Simulation Modelling Practice and Theory最新文献_第10页

Research on allowable deviations of the pilot hole based on TBM conical cutterhead muck discharging simulation in inclined openings 基于TBM斜孔锥形刀盘排泥模拟的导孔允许偏差研究

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-24 DOI: 10.1016/j.simpat.2025.103210

Houzhe Xie , Zhiyong Ji , Xianqiong Zhao , Wei Ke , Jing Xiao , Mei Yang

Due to its high tunneling efficiency under steep conditions, the directed pilot hole in conjunction with the Tunnel Boring Machine (TBM) conical cutterhead has been widely utilized in inclined openings. However, the key factor influencing TBM tunneling efficiency, the mucking efficiency of the conical cutterhead, is significantly affected by unavoidable pilot hole deviations. In this study, the muck flow characteristics of the conical cutterhead with a pilot hole under steep conditions were analyzed using a comprehensive Discrete Element Method simulation that encompassed the stages of falling, shoveling, and discharging. Then the muck discharge efficiency and residual muck efficiency were employed as quantitative indicators to evaluate the cutterhead’s mucking performance and secondary cutter wear. Furthermore, the interactive effects of deviation distance of the pilot hole (DD) and deviation angle of the pilot hole (DA) on mucking performance were investigated. Based on various engineering requirements, a weighted multi-factor analysis method is proposed for determining the allowable deviations of the pilot hole. For a specific inclined shaft with the following characteristics: a cutterhead with a diameter of 7690 mm, a conical angle of 15°, a 2500 mm pilot hole and a tunneling inclination of 55°, the results indicate that DD reaches a minimum value, when DA=112.5°. Specifically, the minimum DD=183 mm when minimizing secondary cutter wear, and 401 mm when enhancing mucking performance. These findings offer theoretical guidance for determining positional parameters of the pilot hole in inclined openings.

定向导孔配合隧道掘进机锥形刀盘，由于在陡峭条件下具有较高的掘进效率，在倾斜巷道中得到了广泛的应用。然而，影响TBM掘进效率的关键因素——锥形刀盘的排泥效率受到不可避免的导孔偏差的显著影响。在这项研究中，采用离散元法综合模拟，包括下降、铲泥和排出阶段，分析了陡峭条件下带先导孔的锥形刀盘的泥流特性。然后以排渣效率和残余渣土效率作为定量指标，评价刀盘的排渣性能和刀盘二次磨损。此外，还研究了导孔偏差距离（DD）和导孔偏差角度（DA）对排渣性能的交互影响。根据各种工程要求，提出了确定导孔允许偏差的加权多因素分析方法。对于刀盘直径为7690 mm，锥角为15°，导孔为2500 mm，掘进倾角为55°的特定斜井，结果表明，当DA=112.5°时，DD达到最小值。具体而言，当减少二次切削齿磨损时，最小DD=183 mm，当提高排渣性能时，最小DD= 401 mm。研究结果为确定斜孔导孔位置参数提供了理论指导。

{"title":"Research on allowable deviations of the pilot hole based on TBM conical cutterhead muck discharging simulation in inclined openings","authors":"Houzhe Xie , Zhiyong Ji , Xianqiong Zhao , Wei Ke , Jing Xiao , Mei Yang","doi":"10.1016/j.simpat.2025.103210","DOIUrl":"10.1016/j.simpat.2025.103210","url":null,"abstract":"<div><div>Due to its high tunneling efficiency under steep conditions, the directed pilot hole in conjunction with the Tunnel Boring Machine (TBM) conical cutterhead has been widely utilized in inclined openings. However, the key factor influencing TBM tunneling efficiency, the mucking efficiency of the conical cutterhead, is significantly affected by unavoidable pilot hole deviations. In this study, the muck flow characteristics of the conical cutterhead with a pilot hole under steep conditions were analyzed using a comprehensive Discrete Element Method simulation that encompassed the stages of falling, shoveling, and discharging. Then the muck discharge efficiency and residual muck efficiency were employed as quantitative indicators to evaluate the cutterhead’s mucking performance and secondary cutter wear. Furthermore, the interactive effects of deviation distance of the pilot hole (<em>DD</em>) and deviation angle of the pilot hole (<em>DA</em>) on mucking performance were investigated. Based on various engineering requirements, a weighted multi-factor analysis method is proposed for determining the allowable deviations of the pilot hole. For a specific inclined shaft with the following characteristics: a cutterhead with a diameter of 7690 mm, a conical angle of 15°, a 2500 mm pilot hole and a tunneling inclination of 55°, the results indicate that <em>DD</em> reaches a minimum value, when <em>DA</em>=112.5°. Specifically, the minimum <em>DD</em>=183 mm when minimizing secondary cutter wear, and 401 mm when enhancing mucking performance. These findings offer theoretical guidance for determining positional parameters of the pilot hole in inclined openings.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103210"},"PeriodicalIF":3.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145220743","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical modelling of drop mass shape influence on energy absorption of welded wire mesh in dynamic impact conditions 动态冲击条件下跌落质量形状对焊接网吸能影响的数值模拟

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-17 DOI: 10.1016/j.simpat.2025.103207

Ceren Karatas Batan , Selahattin Akdag , Chengguo Zhang , Joung Oh , Serkan Saydam

Underground mines rely on a ground support system (i.e. reinforcement and surface support elements such as welded wire mesh) to control rock deformation and maintain excavation stability under dynamic loading conditions. Designing an effective ground support system requires a detailed understanding of the mechanical behaviour of these support components and their response to impact scenarios. This study investigates the influence of drop mass geometry on the deformation and failure mechanisms of welded wire mesh utilising a 3D finite element analysis (FEA) based on geometries used in laboratory testing. Five drop mass configurations, prism, spherical, cylindrical, ETAG 027, and irregular, were evaluated under the same energy input to explore their effects on mesh behaviour. Although the developed dynamic testing setup offers valuable insights into mesh performance, the lack of standardised drop mass shapes remains a significant challenge, as it causes inconsistencies in test results and complicates data comparison across different studies or reliable experiment replication. The FEA model was developed and calibrated using experimental data. The results demonstrated that the drop mass shape strongly affects load distribution, displacement patterns and the extent of damage in the mesh. The prism shape, used for calibration, provided a good match with the laboratory result. Cylindrical geometries demonstrated more favourable energy dissipation, absorbing 5.69 kJ, whereas the irregular and spherical shapes exhibited lower energy absorption, 2.83 kJ and 2.55 kJ, respectively, due to the concentrated nature of the initial impact load being distributed over a smaller contact area. The ETAG 027 geometry produced a balanced response, with a peak displacement of approximately 152.77 mm and an energy absorption of 3.06 kJ, accompanied by moderately distributed plastic deformation. This study can support the development of more reliable testing procedures and energy-based design approaches for support systems in dynamic underground environments.

地下矿山在动载条件下，依靠地面支护系统（即钢筋和焊接钢丝网等地表支护元件）控制岩石变形，维持开挖稳定。设计一个有效的地面支撑系统需要详细了解这些支撑部件的机械行为及其对冲击情景的响应。本研究利用基于实验室测试中使用的几何形状的三维有限元分析（FEA）研究了下落质量几何形状对焊接钢丝网变形和破坏机制的影响。在相同的能量输入下，评估了棱镜、球形、圆柱形、ETAG 027和不规则五种水滴质量构型，以探索它们对网格行为的影响。尽管开发的动态测试设置为网格性能提供了有价值的见解，但缺乏标准化的下落质量形状仍然是一个重大挑战，因为它会导致测试结果不一致，并使不同研究之间的数据比较复杂化或可靠的实验复制。利用实验数据建立了有限元模型并进行了标定。结果表明，降质量形状对载荷分布、位移模式和网格损伤程度有较大影响。用于标定的棱镜形状与实验室结果吻合良好。由于初始冲击载荷集中分布在较小的接触面积上，圆柱形结构的能量消耗更有利，吸收了5.69 kJ，而不规则形状和球形结构的能量吸收较低，分别为2.83 kJ和2.55 kJ。ETAG 027的几何形状产生了平衡的响应，峰值位移约为152.77 mm，能量吸收为3.06 kJ，并伴有适度分布的塑性变形。该研究可以为动态地下环境中支撑系统开发更可靠的测试程序和基于能量的设计方法提供支持。

{"title":"Numerical modelling of drop mass shape influence on energy absorption of welded wire mesh in dynamic impact conditions","authors":"Ceren Karatas Batan , Selahattin Akdag , Chengguo Zhang , Joung Oh , Serkan Saydam","doi":"10.1016/j.simpat.2025.103207","DOIUrl":"10.1016/j.simpat.2025.103207","url":null,"abstract":"<div><div>Underground mines rely on a ground support system (i.e. reinforcement and surface support elements such as welded wire mesh) to control rock deformation and maintain excavation stability under dynamic loading conditions. Designing an effective ground support system requires a detailed understanding of the mechanical behaviour of these support components and their response to impact scenarios. This study investigates the influence of drop mass geometry on the deformation and failure mechanisms of welded wire mesh utilising a 3D finite element analysis (FEA) based on geometries used in laboratory testing. Five drop mass configurations, prism, spherical, cylindrical, ETAG 027, and irregular, were evaluated under the same energy input to explore their effects on mesh behaviour. Although the developed dynamic testing setup offers valuable insights into mesh performance, the lack of standardised drop mass shapes remains a significant challenge, as it causes inconsistencies in test results and complicates data comparison across different studies or reliable experiment replication. The FEA model was developed and calibrated using experimental data. The results demonstrated that the drop mass shape strongly affects load distribution, displacement patterns and the extent of damage in the mesh. The prism shape, used for calibration, provided a good match with the laboratory result. Cylindrical geometries demonstrated more favourable energy dissipation, absorbing 5.69 kJ, whereas the irregular and spherical shapes exhibited lower energy absorption, 2.83 kJ and 2.55 kJ, respectively, due to the concentrated nature of the initial impact load being distributed over a smaller contact area. The ETAG 027 geometry produced a balanced response, with a peak displacement of approximately 152.77 mm and an energy absorption of 3.06 kJ, accompanied by moderately distributed plastic deformation. This study can support the development of more reliable testing procedures and energy-based design approaches for support systems in dynamic underground environments.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103207"},"PeriodicalIF":3.5,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A digital twin-based platform for testing and optimization of path planning algorithms 基于数字孪生的路径规划算法测试与优化平台

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-15 DOI: 10.1016/j.simpat.2025.103206

Guanglie Wang , Zhijia Zhang , Aleksandra Nazarova

With the rapid development of autonomous driving technology, there is an increasing demand for safety, reliability, and optimization efficiency in path planning algorithms. However, traditional physical testing is often costly, time-consuming, and subject to environmental uncertainties, making it difficult to efficiently verify and optimize these algorithms. To address this issue, this paper proposes a high-fidelity digital twin-based platform for testing and optimizing path planning algorithms. By constructing a simulation environment that mirrors the physical world, the platform minimizes the gap between simulation and real-world scenarios, enhancing the safety and stability of path planning. The platform integrates global path planning using the A* algorithm, local path planning with the Timed Elastic Band method, and optimization using Bézier curves to improve the smoothness, feasibility, and safety of the path. Additionally, it incorporates the vehicle’s physical characteristics — such as velocity, steering angle, and drive mode — into the parameter optimization process, ensuring consistency between the simulation and the real-world environment. Experiments were conducted by deploying identical path planning algorithms in both the simulation and the physical environments. The results demonstrate that algorithms optimized through the digital twin platform can be reliably transferred to real-world scenarios, improving obstacle avoidance and overall path planning safety. The planned paths in the physical environment closely matched those in simulation, confirming the effectiveness of the digital twin approach for path planning testing and optimization. This research provides new insights into environmental adaptability, safety assurance, and engineering deployment of path planning in autonomous driving.

随着自动驾驶技术的快速发展，对路径规划算法的安全性、可靠性和优化效率的要求越来越高。然而，传统的物理测试通常是昂贵的，耗时的，并且受到环境不确定性的影响，使得很难有效地验证和优化这些算法。为了解决这一问题，本文提出了一种高保真的基于数字孪生的路径规划算法测试和优化平台。该平台通过构建反映现实世界的仿真环境，最大限度地减少了仿真与现实场景之间的差距，增强了路径规划的安全性和稳定性。该平台采用A*算法进行全局路径规划，采用定时弹性带法进行局部路径规划，采用bsamzier曲线进行优化，提高了路径的平滑性、可行性和安全性。此外，它还将车辆的物理特性（如速度、转向角度和驾驶模式）纳入参数优化过程，以确保模拟与现实环境之间的一致性。通过在仿真和物理环境中部署相同的路径规划算法进行了实验。结果表明，通过数字孪生平台优化的算法可以可靠地转移到现实场景中，提高了避障和整体路径规划的安全性。物理环境下规划的路径与仿真环境下的路径非常吻合，验证了数字孪生方法在路径规划测试和优化方面的有效性。该研究为自动驾驶道路规划的环境适应性、安全保障和工程部署提供了新的见解。

{"title":"A digital twin-based platform for testing and optimization of path planning algorithms","authors":"Guanglie Wang , Zhijia Zhang , Aleksandra Nazarova","doi":"10.1016/j.simpat.2025.103206","DOIUrl":"10.1016/j.simpat.2025.103206","url":null,"abstract":"<div><div>With the rapid development of autonomous driving technology, there is an increasing demand for safety, reliability, and optimization efficiency in path planning algorithms. However, traditional physical testing is often costly, time-consuming, and subject to environmental uncertainties, making it difficult to efficiently verify and optimize these algorithms. To address this issue, this paper proposes a high-fidelity digital twin-based platform for testing and optimizing path planning algorithms. By constructing a simulation environment that mirrors the physical world, the platform minimizes the gap between simulation and real-world scenarios, enhancing the safety and stability of path planning. The platform integrates global path planning using the A* algorithm, local path planning with the Timed Elastic Band method, and optimization using Bézier curves to improve the smoothness, feasibility, and safety of the path. Additionally, it incorporates the vehicle’s physical characteristics — such as velocity, steering angle, and drive mode — into the parameter optimization process, ensuring consistency between the simulation and the real-world environment. Experiments were conducted by deploying identical path planning algorithms in both the simulation and the physical environments. The results demonstrate that algorithms optimized through the digital twin platform can be reliably transferred to real-world scenarios, improving obstacle avoidance and overall path planning safety. The planned paths in the physical environment closely matched those in simulation, confirming the effectiveness of the digital twin approach for path planning testing and optimization. This research provides new insights into environmental adaptability, safety assurance, and engineering deployment of path planning in autonomous driving.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103206"},"PeriodicalIF":3.5,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Forge4Flame: An intuitive dashboard for designing GPU agent-based models to simulate infectious disease spread Forge4Flame：一个直观的仪表板，用于设计基于GPU代理的模型来模拟传染病的传播

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-12 DOI: 10.1016/j.simpat.2025.103205

Daniele Baccega , Irene Terrone , Peter Heywood , Robert Chisholm , Paul Richmond , Sandro Gepiro Contaldo , Lorenzo Bosio , Simone Pernice , Marco Beccuti

Agent-based models are computational models that simulate the dynamic interactions, behaviours, and communication protocols among agents in a shared environment. The use of such models in the field of epidemiology has attracted much attention, allowing the evaluation of the effectiveness of possible interventions and vaccination strategies. However, setting up these environments typically requires a manual and technical process that can be both time-consuming and complex. To address this challenge, we introduce Forge4Flame, a novel and user-friendly dashboard that simplifies the definition of agent-based models for FLAME GPU 2. Our goal is to make this modelling framework more accessible to a broader audience of researchers and public health professionals. Specifically, the tool streamlines model design, execution, and analysis by automatically generating the required FLAME GPU 2 code and incorporating valuable visualisation and post-processing features. Moreover, the integration of two different levels of population model was explored, allowing a detailed analysis of disease dynamics. This shows the tool’s potential to enhance both the accessibility and scalability of agent-based models through Docker and Slurm for efficient distributed computing on high-performance computing systems. Finally, the effectiveness of this tool is demonstrated through a case study that investigates the COVID-19 emergency in a generic Italian middle school.

基于代理的模型是模拟共享环境中代理之间的动态交互、行为和通信协议的计算模型。这种模型在流行病学领域的使用引起了很大的注意，可以对可能的干预措施和疫苗接种战略的有效性进行评估。然而，设置这些环境通常需要一个人工和技术过程，既耗时又复杂。为了应对这一挑战，我们引入了Forge4Flame，这是一个新颖且用户友好的仪表板，它简化了FLAME GPU 2基于代理的模型的定义。我们的目标是使更广泛的研究人员和公共卫生专业人员更容易使用这个建模框架。具体来说，该工具通过自动生成所需的FLAME GPU 2代码并结合有价值的可视化和后处理功能，简化了模型设计，执行和分析。此外，还探索了两个不同层次的种群模型的整合，从而可以详细分析疾病动态。这表明该工具有潜力通过Docker和Slurm增强基于代理的模型的可访问性和可伸缩性，从而在高性能计算系统上实现高效的分布式计算。最后，通过调查意大利一所普通中学的COVID-19紧急情况的案例研究，证明了该工具的有效性。

{"title":"Forge4Flame: An intuitive dashboard for designing GPU agent-based models to simulate infectious disease spread","authors":"Daniele Baccega , Irene Terrone , Peter Heywood , Robert Chisholm , Paul Richmond , Sandro Gepiro Contaldo , Lorenzo Bosio , Simone Pernice , Marco Beccuti","doi":"10.1016/j.simpat.2025.103205","DOIUrl":"10.1016/j.simpat.2025.103205","url":null,"abstract":"<div><div>Agent-based models are computational models that simulate the dynamic interactions, behaviours, and communication protocols among agents in a shared environment. The use of such models in the field of epidemiology has attracted much attention, allowing the evaluation of the effectiveness of possible interventions and vaccination strategies. However, setting up these environments typically requires a manual and technical process that can be both time-consuming and complex. To address this challenge, we introduce <em>Forge4Flame</em>, a novel and user-friendly dashboard that simplifies the definition of agent-based models for FLAME GPU 2. Our goal is to make this modelling framework more accessible to a broader audience of researchers and public health professionals. Specifically, the tool streamlines model design, execution, and analysis by automatically generating the required FLAME GPU 2 code and incorporating valuable visualisation and post-processing features. Moreover, the integration of two different levels of population model was explored, allowing a detailed analysis of disease dynamics. This shows the tool’s potential to enhance both the accessibility and scalability of agent-based models through Docker and Slurm for efficient distributed computing on high-performance computing systems. Finally, the effectiveness of this tool is demonstrated through a case study that investigates the COVID-19 emergency in a generic Italian middle school.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103205"},"PeriodicalIF":3.5,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145105930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Peridynamics modeling of underground borehole instability: Collapse mechanism and stabilization strategy 地下钻孔失稳的周动力学建模：坍塌机理与稳定策略

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-09 DOI: 10.1016/j.simpat.2025.103203

Haoran Xu , Yongsheng Liu , Fei Li , Shuaipeng Wang , Shangyu Yang

Borehole instability is a critical challenge that affects safety and efficiency in deep drilling. Classical continuum mechanics struggles to accurately capture the discontinuous processes of crack initiation and propagation around boreholes. This paper develops and validates a nonlocal borehole damage model based on peridynamics. The borehole collapse mechanism is explored, and the regulatory role of drilling fluid pressure in maintaining borehole stability is evaluated. The results show that borehole collapse initiates along the direction of minimum horizontal pressure, characterized by a crescent-shaped shear failure accompanied by tensile fractures. The borehole eventually evolves into a butterfly-shaped damage pattern with a central fragmented zone. Increasing the elastic modulus of the surrounding rock and reducing the borehole radius effectively inhibits damage propagation. As the elastic modulus increases from 6 to 30 GPa, the areas of the collapse zones are reduced by 87.50%, indicating a substantial enhancement in the material’s resistance to both microcrack initiation and macroscopic instability. Low-modulus rocks are more prone to form continuous shear-fracture zones. In contrast, the horizontal pressure difference emerges as the primary driver of damage evolution; once it exceeds 30 MPa, the crack growth resistance deteriorates rapidly, leading to accelerated crack coalescence and the formation of a connected fracture network. An optimal drilling fluid pressure window can suppress up to 85.05% of the damaged area. However, excessive pressure may induce radial tensile fractures. The findings revealed the mechanisms of borehole collapse and confirmed the superiority of the peridynamics model in predicting borehole instability. This study provides theoretical insight and methodological support for stability control in deep drilling operations.

井眼失稳是影响深井钻井安全性和效率的关键问题。经典连续介质力学难以准确地捕捉井眼周围裂纹萌生和扩展的不连续过程。本文建立并验证了基于周动力学的非局部井眼损伤模型。探讨了井眼坍塌机理，评价了钻井液压力对维持井眼稳定性的调节作用。结果表明：井眼塌陷沿最小水平压力方向开始，以月牙形剪切破坏伴张性破裂为特征；钻孔最终演变成蝴蝶形的破坏模式，中心有破碎带。增加围岩弹性模量和减小钻孔半径可以有效抑制损伤的传播。当弹性模量从6 GPa增加到30 GPa时，坍塌区面积减少了87.50%，表明材料的抗微裂纹萌生和抗宏观失稳能力都有了显著增强。低模量岩石更容易形成连续剪切破碎带。水平压差是损伤演化的主要驱动力；一旦超过30 MPa，裂纹扩展阻力迅速恶化，导致裂纹加速合并，形成连通的裂缝网络。最佳钻井液压力窗可抑制85.05%的损伤面积。然而，过大的压力可能诱发径向张性骨折。研究结果揭示了井眼坍塌的机理，证实了周动力学模型在预测井眼失稳方面的优越性。该研究为深部钻井作业的稳定性控制提供了理论见解和方法支持。

{"title":"Peridynamics modeling of underground borehole instability: Collapse mechanism and stabilization strategy","authors":"Haoran Xu , Yongsheng Liu , Fei Li , Shuaipeng Wang , Shangyu Yang","doi":"10.1016/j.simpat.2025.103203","DOIUrl":"10.1016/j.simpat.2025.103203","url":null,"abstract":"<div><div>Borehole instability is a critical challenge that affects safety and efficiency in deep drilling. Classical continuum mechanics struggles to accurately capture the discontinuous processes of crack initiation and propagation around boreholes. This paper develops and validates a nonlocal borehole damage model based on peridynamics. The borehole collapse mechanism is explored, and the regulatory role of drilling fluid pressure in maintaining borehole stability is evaluated. The results show that borehole collapse initiates along the direction of minimum horizontal pressure, characterized by a crescent-shaped shear failure accompanied by tensile fractures. The borehole eventually evolves into a butterfly-shaped damage pattern with a central fragmented zone. Increasing the elastic modulus of the surrounding rock and reducing the borehole radius effectively inhibits damage propagation. As the elastic modulus increases from 6 to 30 GPa, the areas of the collapse zones are reduced by 87.50%, indicating a substantial enhancement in the material’s resistance to both microcrack initiation and macroscopic instability. Low-modulus rocks are more prone to form continuous shear-fracture zones. In contrast, the horizontal pressure difference emerges as the primary driver of damage evolution; once it exceeds 30 MPa, the crack growth resistance deteriorates rapidly, leading to accelerated crack coalescence and the formation of a connected fracture network. An optimal drilling fluid pressure window can suppress up to 85.05% of the damaged area. However, excessive pressure may induce radial tensile fractures. The findings revealed the mechanisms of borehole collapse and confirmed the superiority of the peridynamics model in predicting borehole instability. This study provides theoretical insight and methodological support for stability control in deep drilling operations.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103203"},"PeriodicalIF":3.5,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145049318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From pedestrian simulation to security screening checkpoint planning: Simulation-enhanced optimization method 从行人模拟到安检检查站规划：仿真增强优化方法

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-09-02 DOI: 10.1016/j.simpat.2025.103202

Xiaoting Yuan , Tieqiao Tang , Tao Wang , Nikolai Bode

Modeling pedestrian flow through security checkpoints is critical for efficient airport operations. In this study, we develop a discrete event simulation model to describe queue dynamics at security screening checkpoints. Focusing on queue lengths, waiting times, and passenger arrival rates, we investigate how dynamically changing the number of open checkpoints affects system performance. Building on these insights, we formulate a mixed-integer linear programming model that incorporates system performance states derived from simulations to optimize checkpoint planning over time. Finally, we validate our approach through simulations based on arrival data from Guangzhou Baiyun International Airport, China. Compared with a stand-alone mixed-integer linear programming formulation, the simulation-enhanced method achieves fewer total and peak lanes while meeting the same service-level targets. By providing an accurate representation of pedestrian flows, this research offers airports a practical decision tool for dynamic resource allocation and improved checkpoint performance.

模拟通过安检点的人流对机场的高效运营至关重要。在这项研究中，我们开发了一个离散事件模拟模型来描述安全检查检查点的队列动态。我们关注队列长度、等待时间和乘客到达率，研究动态改变开放检查点的数量如何影响系统性能。在这些见解的基础上，我们制定了一个混合整数线性规划模型，该模型结合了从模拟中获得的系统性能状态，以优化检查点规划。最后，我们通过广州白云国际机场的到达数据进行了仿真验证。与独立的混合整数线性规划公式相比，仿真增强方法在满足相同服务水平目标的情况下实现了更少的总车道和峰值车道。通过提供行人流量的准确表示，本研究为机场动态资源分配和改善检查站性能提供了实用的决策工具。

{"title":"From pedestrian simulation to security screening checkpoint planning: Simulation-enhanced optimization method","authors":"Xiaoting Yuan , Tieqiao Tang , Tao Wang , Nikolai Bode","doi":"10.1016/j.simpat.2025.103202","DOIUrl":"10.1016/j.simpat.2025.103202","url":null,"abstract":"<div><div>Modeling pedestrian flow through security checkpoints is critical for efficient airport operations. In this study, we develop a discrete event simulation model to describe queue dynamics at security screening checkpoints. Focusing on queue lengths, waiting times, and passenger arrival rates, we investigate how dynamically changing the number of open checkpoints affects system performance. Building on these insights, we formulate a mixed-integer linear programming model that incorporates system performance states derived from simulations to optimize checkpoint planning over time. Finally, we validate our approach through simulations based on arrival data from Guangzhou Baiyun International Airport, China. Compared with a stand-alone mixed-integer linear programming formulation, the simulation-enhanced method achieves fewer total and peak lanes while meeting the same service-level targets. By providing an accurate representation of pedestrian flows, this research offers airports a practical decision tool for dynamic resource allocation and improved checkpoint performance.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103202"},"PeriodicalIF":3.5,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144989364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of start-up strategies of gas injection compressor in underground gas storage using deep reinforcement learning 基于深度强化学习的地下储气库注气压缩机启动策略优化

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-08-30 DOI: 10.1016/j.simpat.2025.103204

Xingyu Zhao , Changhe Li , Pengzhi Lu , Wei Li , Weiwei Qiu , Wuchang Wang , Yuxing Li

Injection compressors, as the core equipment in the gas injection process of underground gas storage (UGS) facilities, play a vital role in ensuring the safe and efficient operation of UGS systems. However, traditional optimization methods often struggle to adapt dynamically under complex operating conditions and may lead to excessive energy consumption. To address these challenges, this study proposes a deep reinforcement learning (DRL)-based approach to optimize compressor start-up strategies. First, a high-fidelity hybrid simulation model is developed by integrating thermodynamic equations of reciprocating compressors with a residual correction network based on a multilayer perceptron, forming a Mechanism-Data fusion Model framework. This model achieves prediction errors of <5 % for power and <3 % for discharge flow rate. Based on the accurate simulation model, an optimization framework is constructed using the Twin Delayed Deep Deterministic Policy Gradient (TD3) algorithm. Within this framework, continuous control variables—such as the number of operating compressors, inlet throttling levels, and relative clearance volume adjustments—are mapped to the action space of the reinforcement learning agent. A multi-objective reward function is designed to incorporate penalties for gas injection deviations, the number of active compressors, inlet pressure constraints, and clearance volume limits. By introducing delayed updates to the target network and applying an adaptive noise clipping mechanism, the proposed strategy ensures optimal parameter control across the entire gas injection cycle while satisfying operational and safety requirements. Experimental results demonstrate that the proposed method reduces compressor energy consumption by 5.18 %, offering a precise, adaptive, and intelligent decision-making solution for dynamic optimization of UGS compressor operations.

注气压缩机作为地下储气库设施注气过程中的核心设备，对保证地下储气库系统安全高效运行起着至关重要的作用。然而，传统的优化方法往往难以动态适应复杂的运行条件，并且可能导致过多的能量消耗。为了应对这些挑战，本研究提出了一种基于深度强化学习（DRL）的方法来优化压缩机启动策略。首先，将往复式压缩机热力学方程与基于多层感知器的残差校正网络相结合，建立了高保真混合仿真模型，形成了机制-数据融合模型框架；该模型对功率的预测误差为5%，对流量的预测误差为3%。在精确仿真模型的基础上，采用双延迟深度确定性策略梯度（TD3）算法构建了优化框架。在这个框架中，连续的控制变量——如运行压缩机的数量、进口节流水平和相对间隙量调整——被映射到强化学习代理的动作空间。设计了一个多目标奖励函数，包括对注气偏差、活动压缩机数量、进口压力约束和间隙容积限制的惩罚。通过向目标网络引入延迟更新，并应用自适应噪声抑制机制，该策略确保在满足操作和安全要求的同时，在整个注气周期内实现最优参数控制。实验结果表明，该方法可将压缩机能耗降低5.18%，为UGS压缩机运行动态优化提供了精确、自适应、智能的决策解决方案。

{"title":"Optimization of start-up strategies of gas injection compressor in underground gas storage using deep reinforcement learning","authors":"Xingyu Zhao , Changhe Li , Pengzhi Lu , Wei Li , Weiwei Qiu , Wuchang Wang , Yuxing Li","doi":"10.1016/j.simpat.2025.103204","DOIUrl":"10.1016/j.simpat.2025.103204","url":null,"abstract":"<div><div>Injection compressors, as the core equipment in the gas injection process of underground gas storage (UGS) facilities, play a vital role in ensuring the safe and efficient operation of UGS systems. However, traditional optimization methods often struggle to adapt dynamically under complex operating conditions and may lead to excessive energy consumption. To address these challenges, this study proposes a deep reinforcement learning (DRL)-based approach to optimize compressor start-up strategies. First, a high-fidelity hybrid simulation model is developed by integrating thermodynamic equations of reciprocating compressors with a residual correction network based on a multilayer perceptron, forming a Mechanism-Data fusion Model framework. This model achieves prediction errors of <5 % for power and <3 % for discharge flow rate. Based on the accurate simulation model, an optimization framework is constructed using the Twin Delayed Deep Deterministic Policy Gradient (TD3) algorithm. Within this framework, continuous control variables—such as the number of operating compressors, inlet throttling levels, and relative clearance volume adjustments—are mapped to the action space of the reinforcement learning agent. A multi-objective reward function is designed to incorporate penalties for gas injection deviations, the number of active compressors, inlet pressure constraints, and clearance volume limits. By introducing delayed updates to the target network and applying an adaptive noise clipping mechanism, the proposed strategy ensures optimal parameter control across the entire gas injection cycle while satisfying operational and safety requirements. Experimental results demonstrate that the proposed method reduces compressor energy consumption by 5.18 %, offering a precise, adaptive, and intelligent decision-making solution for dynamic optimization of UGS compressor operations.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103204"},"PeriodicalIF":3.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multi-objectives optimization of evacuation path based on improved matrix translation model and exit balance algorithm 基于改进矩阵平移模型和出口平衡算法的疏散路径多目标优化

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-08-23 DOI: 10.1016/j.simpat.2025.103201

Chun Sheng , Qize He , Liping Yu , Jiacheng Wang , Haoming Xie , Zhiming Fang , Zhongyi Huang

Emergency evacuation planning requires balancing multiple objectives like minimizing time, avoiding hazards, and ensuring fairness. Traditional methods struggle to strike a balance between macroscopic efficiency and microscopic realism. This study proposes a new multi-objective optimization framework based on an improved Matrix Translation Model (MTM) and Exit Balance Algorithm (EBA): the improved MTM efficiently simulates the evacuation process and obtains individual objectives, thereby deriving group evacuation time objective

f_{t}

, detour objective

f_{d}

; crowding objective

f_{c}

, injury objective

f_{i}

and fatality objective

f_{f}

.

f_{d}

,

f_{c}

,

f_{i}

and

f_{f}

are converted into penalty terms for

f_{t}

, and the improved EBA algorithm balances evacuation times across different exits to solve the multi-objective problem. This framework ensures precise statistical analysis of individual evacuation parameters while guaranteeing that each iteration moves closer to the optimal solution, enabling rapid convergence. Optimization results from a scenario with 2 floors, 42 rooms, and 1688 evacuees demonstrate that the algorithm can complete the simulation within 8–15 s, and the evacuation time reduced by 16 % while controlling detour and crowding duration in the scenario without fire, and the cumulative injury probability cut by 42 % in the fire scenario. This work bridges macroscopic efficiency and microscopic realism, offering a practical solution for dynamic evacuation planning.

紧急疏散计划需要平衡多个目标，如最小化时间、避免危险和确保公平性。传统的方法努力在宏观效率和微观现实主义之间取得平衡。本文提出了一种基于改进矩阵平移模型（MTM）和出口平衡算法（EBA）的多目标优化框架：改进的矩阵平移模型有效地模拟疏散过程并获得个体目标，从而得到群体疏散时间目标ft、绕行目标fd；拥挤目标fc，伤害目标fi，死亡目标ff。将fd、fc、fi、ff转换为ft的惩罚项，改进的EBA算法平衡不同出口的疏散时间，解决多目标问题。该框架确保对单个疏散参数进行精确的统计分析，同时保证每次迭代都更接近最佳解决方案，从而实现快速收敛。以2层、42间、1688人的疏散场景为例进行优化，结果表明，该算法可在8 ~ 15 s内完成模拟，在不发生火灾的情况下，在控制绕行和拥挤时间的情况下，疏散时间减少16%，在发生火灾的情况下，累计伤害概率减少42%。这项工作在宏观效率和微观真实性之间架起了桥梁，为动态疏散规划提供了实用的解决方案。

{"title":"Multi-objectives optimization of evacuation path based on improved matrix translation model and exit balance algorithm","authors":"Chun Sheng , Qize He , Liping Yu , Jiacheng Wang , Haoming Xie , Zhiming Fang , Zhongyi Huang","doi":"10.1016/j.simpat.2025.103201","DOIUrl":"10.1016/j.simpat.2025.103201","url":null,"abstract":"<div><div>Emergency evacuation planning requires balancing multiple objectives like minimizing time, avoiding hazards, and ensuring fairness. Traditional methods struggle to strike a balance between macroscopic efficiency and microscopic realism. This study proposes a new multi-objective optimization framework based on an improved Matrix Translation Model (MTM) and Exit Balance Algorithm (EBA): the improved MTM efficiently simulates the evacuation process and obtains individual objectives, thereby deriving group evacuation time objective <span><math><msub><mi>f</mi><mi>t</mi></msub></math></span>, detour objective <span><math><msub><mi>f</mi><mi>d</mi></msub></math></span>; crowding objective <span><math><msub><mi>f</mi><mi>c</mi></msub></math></span>, injury objective <span><math><msub><mi>f</mi><mi>i</mi></msub></math></span> and fatality objective <span><math><msub><mi>f</mi><mi>f</mi></msub></math></span>. <span><math><msub><mi>f</mi><mi>d</mi></msub></math></span>, <span><math><msub><mi>f</mi><mi>c</mi></msub></math></span>, <span><math><msub><mi>f</mi><mi>i</mi></msub></math></span> and <span><math><msub><mi>f</mi><mi>f</mi></msub></math></span> are converted into penalty terms for <span><math><msub><mi>f</mi><mi>t</mi></msub></math></span>, and the improved EBA algorithm balances evacuation times across different exits to solve the multi-objective problem. This framework ensures precise statistical analysis of individual evacuation parameters while guaranteeing that each iteration moves closer to the optimal solution, enabling rapid convergence. Optimization results from a scenario with 2 floors, 42 rooms, and 1688 evacuees demonstrate that the algorithm can complete the simulation within 8–15 s, and the evacuation time reduced by 16 % while controlling detour and crowding duration in the scenario without fire, and the cumulative injury probability cut by 42 % in the fire scenario. This work bridges macroscopic efficiency and microscopic realism, offering a practical solution for dynamic evacuation planning.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"145 ","pages":"Article 103201"},"PeriodicalIF":3.5,"publicationDate":"2025-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144907974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical study of presplit blasting in rock masses with a closed and filled joint using coupled finite-discrete element method 采用有限-离散元耦合方法对封闭充填岩体预裂爆破进行数值研究

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-08-22 DOI: 10.1016/j.simpat.2025.103199

Mansour Sharafisafa , Zeinab Aliabadian , Luming Shen

The optimized performance of rock blasting heavily relies on the presence of discontinuities. These geological features play an important role in wave and fracture propagation in rocks and can be considered a barrier against the blast wave and fracture propagation. Blasting has many applications, but one of the important aspects is presplitting blasting, in which light blasts are operated to create a continuous plane prior to the main blasting. The goal of this particular blast operation is mainly to inhibit damage to the reserved rock. In the presplit blastingin underground rocks, the magnitude of the ground in-situ stresses plays a vital role and dominates the performance of the presplitting, which can lead to an unsuccessful detonation if mismeasured. There is much evidence that, in many cases, the joints are not closed but instead are filled with a different material. Thus, in this study, the performance of presplit blasting in a rock domain with a closed or filled joint is analysed using the combined finite-discrete element method (FDEM) with a gas in fracture logic. First, the applicability of the method is verified against some experiments. Once verified, 2D FDEM models are analysed to evaluate the influence of an inclined closed or filled flaw on blast-induced fracture development. The FDEM results confirm the strong impact of joint inclination angle on the fragmentation degree. Furthermore, it is shown that the performance of the presplit blasting is remarkably dependent on the magnitude of ground in-situ stresses. The results also show that the filling material and its orientation angle with respect to the maximum principal stress have an imposing effect on the success of the presplitting blasting. Also, it is revealed that in the presplit blasting with filled joint, the failure of the filling is a mode failure, while the connecting fractures are of tensile mode.

岩体爆破的优化性能在很大程度上依赖于不连续面的存在。这些地质特征对岩石中的波和裂缝传播起着重要作用，可以被认为是阻止爆炸波和裂缝传播的屏障。爆破有许多应用，其中一个重要的方面是预裂爆破，在主爆破之前进行轻爆以形成一个连续的平面。这种特殊爆破作业的目的主要是抑制对储备岩石的破坏。在地下岩石预裂爆破中，地应力的大小起着至关重要的作用，它决定着预裂爆破的性能，如果测量不当可能导致爆轰不成功。有很多证据表明，在许多情况下，关节并没有闭合，而是被不同的材料填充。因此，在本研究中，采用结合裂隙内气体逻辑的有限-离散单元法（FDEM）对具有闭合或充填节理的岩石域中的预裂爆破性能进行了分析。首先，通过实验验证了该方法的适用性。验证后，分析二维FDEM模型，以评估倾斜闭合或填充缺陷对爆致裂缝发育的影响。FDEM结果证实节理倾角对破碎程度的影响较大。此外，研究表明，预裂爆破的效果与地应力的大小有显著的关系。结果还表明，充填材料及其相对于最大主应力的取向角对预裂爆破的成功与否有重要影响。结果表明，在填缝预裂爆破中，填缝破坏为模态破坏，连接裂缝为拉伸破坏。

{"title":"Numerical study of presplit blasting in rock masses with a closed and filled joint using coupled finite-discrete element method","authors":"Mansour Sharafisafa , Zeinab Aliabadian , Luming Shen","doi":"10.1016/j.simpat.2025.103199","DOIUrl":"10.1016/j.simpat.2025.103199","url":null,"abstract":"<div><div>The optimized performance of rock blasting heavily relies on the presence of discontinuities. These geological features play an important role in wave and fracture propagation in rocks and can be considered a barrier against the blast wave and fracture propagation. Blasting has many applications, but one of the important aspects is presplitting blasting, in which light blasts are operated to create a continuous plane prior to the main blasting. The goal of this particular blast operation is mainly to inhibit damage to the reserved rock. In the presplit blastingin underground rocks, the magnitude of the ground in-situ stresses plays a vital role and dominates the performance of the presplitting, which can lead to an unsuccessful detonation if mismeasured. There is much evidence that, in many cases, the joints are not closed but instead are filled with a different material. Thus, in this study, the performance of presplit blasting in a rock domain with a closed or filled joint is analysed using the combined finite-discrete element method (FDEM) with a gas in fracture logic. First, the applicability of the method is verified against some experiments. Once verified, 2D FDEM models are analysed to evaluate the influence of an inclined closed or filled flaw on blast-induced fracture development. The FDEM results confirm the strong impact of joint inclination angle on the fragmentation degree. Furthermore, it is shown that the performance of the presplit blasting is remarkably dependent on the magnitude of ground in-situ stresses. The results also show that the filling material and its orientation angle with respect to the maximum principal stress have an imposing effect on the success of the presplitting blasting. Also, it is revealed that in the presplit blasting with filled joint, the failure of the filling is a mode failure, while the connecting fractures are of tensile mode.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"144 ","pages":"Article 103199"},"PeriodicalIF":3.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Failure mechanisms of block-flexural toppling: An extensive numerical study 块体弯曲倾倒破坏机制：广泛的数值研究

IF 3.5 2区计算机科学 Q2 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Simulation Modelling Practice and Theory

Pub Date : 2025-08-20 DOI: 10.1016/j.simpat.2025.103198

Mohammad Seyfaddini , Mojtaba Bahaaddini , Saeed Karimi Nasab , Mohammad Hossein Khosravi , Hossein Masoumi

Toppling failure is a common instability in natural rock slopes. The common approaches for investigating toppling failure mechanisms are physical and analytical methods, which encounter special difficulties for the test set-up and limitation in the number of physical experiments as well as complicated governing equations in analytical models. Recent advances in numerical modeling, particularly the discrete element method (DEM), have opened new avenues for understanding the complex mechanisms behind toppling failure. In this work, the ability of numerical method in reproducing toppling mechanism was first investigated through an extensive comparative analysis with physical and analytical methods. Hence, the validated numerical models were employed to statistically examine the individual and interactive effects of different parameters on the block-flexural toppling failure mechanism using the response surface methodology (RSM). To explore the statistical significance of effective parameters, the central composite design (CCD) was employed. The analysis revealed that aspect ratio constitutes the most influential parameter governing block-flexural toppling failure, while block unit weight found to be the least significant factor. Also, it was found out that the block unit weight and the block aspect ratio can cause a decrease in the failure initiation angle. It was concluded that an increase in the joint friction angle and block tensile strength can increase the stability of slope where the joint friction angle can change the shape and location of failure surface. Finally, evaluation of interaction effects showed that the impact of block tensile strength on block-flexural failure increases with an increase in block slenderness.

倾倒破坏是天然岩质边坡中常见的失稳形式。研究倾倒破坏机制的常用方法是物理方法和分析方法，但由于物理实验数量的限制以及分析模型中控制方程的复杂性，这些方法在试验设置上遇到了特殊的困难。数值模拟的最新进展，特别是离散元法（DEM），为理解倾覆破坏背后的复杂机制开辟了新的途径。在这项工作中，通过与物理方法和分析方法的广泛对比分析，首次研究了数值方法在再现倾倒机理方面的能力。在此基础上，采用响应面法（RSM）统计分析了不同参数对块体弯曲倾倒破坏机制的个体效应和交互效应。为探讨有效参数的统计学意义，采用中心组合设计（CCD）。分析表明，长径比是影响块体弯曲倾倒破坏的最重要参数，而块体单元重量是影响最小的因素。同时，还发现砌块单元重量和砌块长径比都能减小破坏起裂角。结果表明，节理摩擦角的增大和块体抗拉强度的增大均能提高边坡的稳定性，其中节理摩擦角会改变破坏面的形状和位置。最后，相互作用效应的评价表明，块体抗拉强度对块体弯曲破坏的影响随着块体长细比的增加而增加。

{"title":"Failure mechanisms of block-flexural toppling: An extensive numerical study","authors":"Mohammad Seyfaddini , Mojtaba Bahaaddini , Saeed Karimi Nasab , Mohammad Hossein Khosravi , Hossein Masoumi","doi":"10.1016/j.simpat.2025.103198","DOIUrl":"10.1016/j.simpat.2025.103198","url":null,"abstract":"<div><div>Toppling failure is a common instability in natural rock slopes. The common approaches for investigating toppling failure mechanisms are physical and analytical methods, which encounter special difficulties for the test set-up and limitation in the number of physical experiments as well as complicated governing equations in analytical models. Recent advances in numerical modeling, particularly the discrete element method (DEM), have opened new avenues for understanding the complex mechanisms behind toppling failure. In this work, the ability of numerical method in reproducing toppling mechanism was first investigated through an extensive comparative analysis with physical and analytical methods. Hence, the validated numerical models were employed to statistically examine the individual and interactive effects of different parameters on the block-flexural toppling failure mechanism using the response surface methodology (RSM). To explore the statistical significance of effective parameters, the central composite design (CCD) was employed. The analysis revealed that aspect ratio constitutes the most influential parameter governing block-flexural toppling failure, while block unit weight found to be the least significant factor. Also, it was found out that the block unit weight and the block aspect ratio can cause a decrease in the failure initiation angle. It was concluded that an increase in the joint friction angle and block tensile strength can increase the stability of slope where the joint friction angle can change the shape and location of failure surface. Finally, evaluation of interaction effects showed that the impact of block tensile strength on block-flexural failure increases with an increase in block slenderness.</div></div>","PeriodicalId":49518,"journal":{"name":"Simulation Modelling Practice and Theory","volume":"144 ","pages":"Article 103198"},"PeriodicalIF":3.5,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144902502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0