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A method for modifying octagonal Goodman–Smith fatigue limit diagram 修改八边形古德曼-史密斯疲劳极限图的方法
IF 2.7 Pub Date : 2024-02-29 DOI: 10.1108/ijsi-12-2023-0136
Yuhan Tang, Yuedong Wang, Jiayu Liu, Boya Tian, Qi Dong, Ziwei He, Jiayi Wen
PurposeIn order to extend the application of the original octagonal Goodman–Smith fatigue limit diagram, which is commonly used for the evaluation of structure fatigue stress in engineering, a modification of it is proposed for the structure made of S355 steel (commonly used in high-speed electric multiple units (EMUs) bogie frame).Design/methodology/approachThe modification is made based on Deutscher Verband für Schweißen und verwandte Verfahren e. V. (DVS) 1612 standard and the γ-P-S-N curve, with consideration of the fatigue evaluation requirements of different survival rates and confidence levels. The verification of the modification is performed for three welded joints and for the comparison with the experimental data.FindingsThe results indicate that the design survival rate, the design safety margin and the fatigue stress evaluation of welded joint types are all improved by using the modified diagram.Originality/valueThere are relatively few studies on modifying octagonal Goodman–Smith fatigue limit diagram. In this paper, a modified diagram is proposed and applied in order to ensure the safety and durability of key welded structures of rail vehicles.
目的为了扩大工程中常用于评估结构疲劳应力的原始八角形 Goodman-Smith 疲劳极限图的应用范围,提出了针对 S355 钢结构(常用于高速电力动车组(EMU)转向架构架)的修改方案。设计/方法/途径该修改基于德国焊接和通用机械协会(DVS)1612 标准和 γ-P-S-N 曲线,并考虑了不同存活率和置信水平的疲劳评估要求。结果表明,使用修改后的图表,焊接接头类型的设计存活率、设计安全裕度和疲劳应力评估都得到了改善。原创性/价值关于修改八角形 Goodman-Smith 疲劳极限图表的研究相对较少。本文提出并应用了一种修正图,以确保轨道车辆关键焊接结构的安全性和耐久性。
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引用次数: 0
Influence of pre-existing cracks and concrete cover on service life of reinforced concrete and mechanical behaviour of corroded rebars 原有裂缝和混凝土覆盖层对钢筋混凝土使用寿命和受腐蚀钢筋机械性能的影响
IF 2.7 Pub Date : 2024-01-30 DOI: 10.1108/ijsi-12-2023-0139
Kuleni Fekadu Yadeta, S. Siriwardane, T. A. Mohammed, H. Lemu
PurposeIncorporating pre-existing crack in service life prediction of reinforced concrete structures subjected to corrosion is crucial for accurate assessment, realistic modelling and effective decision-making in terms of maintenance and repair strategies.Design/methodology/approachAn accelerated corrosion test was conducted by using impressed current method on cylindrical specimens with varying cover thickness and crack width. Mechanical properties of the specimens were evaluated by tensile tests.FindingsThe results show that, the pre-cracked samples exhibited shorter concrete cover cracking times, particularly with wider cracks when compared to the uncracked samples. Moreover, the load-bearing capacity of the reinforcement bars decreased owing to the pre-cracks, causing structural deflection and a shortened yield plateau. However, the ductility index remained consistent across all sample types, implying that the concrete had good overall ductility. Comparing the results of the non-corroded rebar and corroded rebar samples, the maximum reduction in the yield load was 25.22%, whereas the maximum reduction in the ultimate load was 26.23%. The simple mathematical model proposed in this study provides a reliable method for predicting the chloride ion diffusion coefficient in cracked concrete of existing reinforced concrete structures.Originality/valueA simple mathematical model was proposed for evaluation of the equivalent chloride ion diffusion coefficient considering crack width, average crack spacing and crack extending lengths for cracked reinforced concrete structures, which is used to incorporate existing crack in service life prediction models.
目的在受腐蚀的钢筋混凝土结构的使用寿命预测中纳入预先存在的裂缝对于准确评估、建立现实的模型以及在维护和修理策略方面做出有效决策至关重要。结果结果表明,与未开裂试样相比,预开裂试样的混凝土覆盖层开裂时间更短,尤其是裂缝更宽时。此外,由于存在预裂缝,钢筋的承载能力下降,导致结构变形和屈服平台缩短。然而,所有类型样本的延性指数保持一致,这意味着混凝土具有良好的整体延性。对比未锈蚀钢筋和锈蚀钢筋样本的结果,屈服荷载的最大减幅为 25.22%,而极限荷载的最大减幅为 26.23%。本研究提出的简单数学模型为预测现有钢筋混凝土结构裂缝混凝土中的氯离子扩散系数提供了可靠的方法。 原创性/价值 本研究提出了一个简单的数学模型,用于评估裂缝钢筋混凝土结构的等效氯离子扩散系数,该模型考虑了裂缝宽度、平均裂缝间距和裂缝延伸长度,可用于将现有裂缝纳入使用寿命预测模型。
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引用次数: 0
Evaluation of the strain response of FRP partially confined concrete using FEM and DIC testing 利用有限元和 DIC 测试评估 FRP 部分约束混凝土的应变响应
IF 2.7 Pub Date : 2024-01-09 DOI: 10.1108/ijsi-11-2023-0112
Yunfei Zou
PurposeThis study aims to enhance the understanding of fiber-reinforced polymer (FRP) applications in partially confined concrete, with a specific focus on improving economic value and load-bearing capacity. The research addresses the need for a more comprehensive analysis of non-uniform vertical strain responses and precise stress–strain models for FRP partially confined concrete.Design/methodology/approachDIC and strain gauges were employed to gather data during axial compression tests on FRP partially confined concrete specimens. Finite element analysis using ABAQUS was utilized to model partial confinement concrete with various constraint area ratios, ranging from 0 to 1. Experimental findings and simulation results were compared to refine and validate the stress–strain model.FindingsThe experimental results revealed that specimens exhibited strain responses characterized by either hardening or softening in both vertical and horizontal directions. The finite element analysis accurately reflected the relationship between surface constraint forces and axial strains in the x, y and z axes under different constraint area ratios. A proposed stress–strain model demonstrated high predictive accuracy for FRP partially confined concrete columns.Practical implicationsThe stress–strain curves of partially confined concrete, based on Teng's foundation model for fully confined stress–strain behavior, exhibit a high level of predictive accuracy. These findings enhance the understanding of the mechanical behavior of partially confined concrete specimens, which is crucial for designing and assessing FRP confined concrete structures.Originality/valueThis research introduces innovative insights into the superior convenience and efficiency of partial wrapping strategies in the rehabilitation of beam-column joints, surpassing traditional full confinement methods. The study contributes methodological innovation by refining stress–strain models specifically for partially confined concrete, addressing the limitations of existing models. The combination of experimental and simulated assessments using DIC and FEM technologies provides robust empirical evidence, advancing the understanding and optimization of FRP-concrete structure performance. This work holds significance for the broader field of concrete structure reinforcement.
目的 本研究旨在加强对纤维增强聚合物 (FRP) 在局部约束混凝土中应用的了解,特别关注提高经济价值和承载能力。该研究满足了对非均匀垂直应变响应进行更全面分析的需求,并为玻璃纤维增强聚合物局部约束混凝土建立了精确的应力-应变模型。使用 ABAQUS 进行有限元分析,以 0 至 1 的不同约束面积比建立部分约束混凝土模型。实验结果表明,试样在垂直和水平方向上表现出硬化或软化的应变反应。有限元分析准确反映了不同约束面积比下表面约束力与 x、y 和 z 轴轴向应变之间的关系。基于 Teng 的全约束应力应变行为基础模型的局部约束混凝土应力应变曲线具有很高的预测精度。这些发现加深了对部分约束混凝土试件力学行为的理解,这对于设计和评估玻璃钢约束混凝土结构至关重要。 原创性/价值这项研究提出了创新性见解,即部分包裹策略在梁柱连接修复中具有优越的便利性和效率,超过了传统的全约束方法。该研究通过改进应力-应变模型,特别是针对部分约束混凝土的应力-应变模型,解决了现有模型的局限性,为方法论的创新做出了贡献。使用 DIC 和 FEM 技术进行的实验和模拟评估相结合,提供了可靠的经验证据,促进了对 FRP 混凝土结构性能的理解和优化。这项工作对更广泛的混凝土结构加固领域具有重要意义。
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引用次数: 0
Research on fatigue curve fitting methods based on the notch stress approach 基于缺口应力法的疲劳曲线拟合方法研究
IF 2.7 Pub Date : 2024-01-09 DOI: 10.1108/ijsi-10-2023-0106
Shengfu Xue, Zhengping He, Bingzhi Chen, Jianxin Xu
PurposeThis study investigates the fitting techniques for notch fatigue curves, seeking a more reliable method to predict the lifespan of welded structures.Design/methodology/approachBuilding on the fatigue test results of butt and cruciform joints, this research delves into the selection of fitting methods for the notch fatigue curve of welded joints. Both empirical formula and finite element methods (FEMs) were employed to assess the notch stress concentration factor at the toe and root of the two types of welded joints. Considering the mean stress correction and weld misalignment coefficients, the notch fatigue life curves were established using both direct and indirect methods.FindingsAn engineering example was employed to discern the differences between the direct and indirect approaches. The findings highlight the enhanced reliability of the indirect method for fitting the fatigue life curve.Originality/valueWhile the notch stress approach is extensively adopted due to its accurate prediction of component fatigue life, most scholars have overlooked the importance of its curve fitting methods. Existing literature scantily addresses the establishment of these curves. This paper offers a focused examination of fatigue curve fitting techniques, delivering valuable perspectives on method selection.
设计/方法/途径基于对接接头和十字形接头的疲劳测试结果,本研究深入探讨了焊接接头缺口疲劳曲线拟合方法的选择。采用经验公式和有限元方法(FEM)评估了两种类型焊接接头趾部和根部的缺口应力集中系数。考虑到平均应力修正和焊接错位系数,采用直接和间接方法建立了缺口疲劳寿命曲线。尽管缺口应力法因其对部件疲劳寿命的准确预测而被广泛采用,但大多数学者都忽视了其曲线拟合方法的重要性。现有文献很少涉及这些曲线的建立。本文重点探讨了疲劳曲线拟合技术,为方法选择提供了宝贵的视角。
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引用次数: 0
New investigation of delamination using the VCCT method to predict the damage in bonded composite repair plates subjected to tensile load 使用 VCCT 方法预测承受拉伸载荷的粘接复合材料修复板损坏情况的分层新研究
IF 2.7 Pub Date : 2024-01-04 DOI: 10.1108/ijsi-11-2023-0113
Sofiane Talbi, M. Salem, B. Mechab, Tewfik Ghomari, Ahmed Allem, Belabbes Bachir Bouiadjra, Benelmaarouf Mehdi
PurposeThis study provides an analysis of patch repair for cracked aircraft structures. Delamination is a type of damage that affects the patch's behavior. The purpose of this study is to assess the influence of delamination on repair performance.Design/methodology/approachAn analytical and numerical study using the finite element method was conducted for a cracked plate repaired with a patch containing a pre-existing delamination defect. The method for defining the contact pair surfaces and modeling the delamination interaction within the patch interface is specified using the virtual crack closure technique (VCCT) approach.FindingsThe efficiency of the repair is measured in terms of the J-integral. The effects of delamination initiation, mechanical loading, crack length and patch stacking sequences are presented. It is noted that in mode I, delamination propagation is only significant at node A. The numerical results are in good agreement with those of the analytical solution found in the literature. It is observed that the patch's behavior is strongly dependent on loading, crack size and stacking sequences in terms of reducing the structure's lifespan, especially in the presence of delamination.Originality/valueThe numerical modeling presented by the VCCT approach is highly valuable for studying delamination evolution. The influence of loading, crack size and stacking sequences on repair performance is discussed in this work.
目的 本研究分析了裂缝飞机结构的修补修复。分层是影响修补件性能的一种损坏类型。本研究的目的是评估分层对修复性能的影响。设计/方法/途径采用有限元方法对裂纹板进行了分析和数值研究,该裂纹板是用含有预先存在的分层缺陷的补片修复的。使用虚拟裂缝闭合技术 (VCCT) 方法确定了接触对表面的定义方法和补片界面内分层相互作用的建模方法。研究介绍了分层开始、机械加载、裂缝长度和修补层堆叠顺序的影响。数值结果与文献中的分析结果十分吻合。据观察,贴片的行为与加载、裂纹尺寸和堆叠顺序密切相关,会缩短结构的使用寿命,尤其是在存在分层的情况下。 原创性/价值VCCT 方法提出的数值建模对于研究分层的演变非常有价值。本研究讨论了加载、裂纹大小和堆叠顺序对修复性能的影响。
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引用次数: 0
Exploring the mechanical response of functionally graded hollow disks: insights from rotation, gravity and variable heat generation 探索功能分级空心盘的机械响应:从旋转、重力和可变发热中获得启示
IF 2.7 Pub Date : 2023-12-15 DOI: 10.1108/ijsi-10-2023-0095
Sanjay Kumar Singh, L. Sondhi, Rakesh Kumar Sahu, Royal Madan
PurposeThe purpose of the study is to perform elastic stress and deformation analysis of a functionally graded hollow disk under different conditions (rotation, gravity, internal pressure, temperature with variable heat generation) and their combinations.Design/methodology/approachThe classical method of solution, Navier's equation, is used to solve the governing equation. The analysis considers thermal and mechanical boundary conditions and takes into account the variation of material properties according to a power law function of the radius of the disk and grading parameter.FindingsThe findings of the study reveal distinct trends and behaviors based on different grading parameters. The influence of gravity is found to be negligible, resulting in similar patterns to the pure rotation case. Variable heat generation introduces non-linear temperature profiles and higher displacements, with stress values influenced by grading parameters.Practical implicationsThe study provides valuable insights into the behavior of displacement and stresses in hollow disks, offering a deeper understanding of their mechanical response under varying conditions. These insights can be useful in the design and analysis of functionally graded hollow disks in various engineering applications.Originality/valueThe originality and value of this study lies in the consideration of various loading combinations of rotation, gravity, internal pressure and temperature with variable heat generation. Furthermore, the study of effect of various angular rotations, temperatures and pressures expands the understanding of the mechanical behavior of such structures, contributing to the existing body of knowledge in the field.
目的本研究旨在对功能分级空心圆盘在不同条件(旋转、重力、内部压力、温度和可变发热)及其组合下的弹性应力和变形进行分析。分析考虑了热和机械边界条件,并根据圆盘半径和分级参数的幂律函数考虑了材料特性的变化。研究发现,重力的影响可以忽略不计,其结果与纯旋转情况下的模式相似。该研究为了解空心盘的位移和应力行为提供了有价值的见解,使人们对其在不同条件下的机械响应有了更深入的了解。原创性/价值本研究的原创性和价值在于考虑了旋转、重力、内部压力和温度等不同的加载组合以及可变的发热量。此外,对各种角度旋转、温度和压力影响的研究拓展了对此类结构力学行为的理解,为该领域现有知识体系做出了贡献。
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引用次数: 0
Seismic reduction principle and response analysis of variable damping viscous damper system 可变阻尼粘滞阻尼器系统的减震原理和响应分析
IF 2.7 Pub Date : 2023-12-05 DOI: 10.1108/ijsi-08-2023-0085
Shahe Liang, Zhiqiang Zhang, Aiqun Li
PurposeA new type of variable damping viscous damper is developed to meet the settings of different damping parameter values at different working stages. Its main principle and design structure are introduced, and the two-stage and multi-stage controllable damping methods are proposed.Design/methodology/approachThe theoretical calculation formulas of the damping force of power-law fluid variable damping viscous damper at elongated holes are derived, aiming to provide a theoretical basis for the development and application of variable damping viscous dampers. For the newly developed variable damping viscous damper, the dynamic equations for the seismic reduction system with variable damping viscous dampers under a multi-degree-of-freedom system are established. A feasible calculation and analysis method is proposed to derive the solution process of time history analysis. At the same time, a program is also developed using Matlab. The dynamic full-scale test of a two-stage variable damping viscous damper was conducted, demonstrating that the hysteresis curve is complete and the working condition is stable.FindingsThrough the calculation and analysis of examples, the results show that the seismic reduction effect of high and flexible buildings using the seismic reduction system with variable damping viscous dampers is significant. The program developed is used to analyze the seismic response of a broadcasting tower using a variable damping TMD system under large earthquakes. The results indicate that the installation of variable damping viscous dampers can effectively control the maximum inter-story displacement response of TMD water tanks and can effectively consume seismic energy.Originality/valueThis method can provide a guarantee for the safe and effective operation of TMD in wind and vibration control.
目的为满足不同工作阶段不同阻尼参数值的设置,研制了一种新型变阻尼粘性阻尼器。介绍了其主要工作原理和设计结构,提出了两级和多级可控阻尼方法。推导了幂律流体变阻尼粘滞阻尼器在细长孔处阻尼力的理论计算公式,旨在为变阻尼粘滞阻尼器的开发和应用提供理论依据。针对新研制的变阻尼粘性阻尼器,建立了多自由度变阻尼粘性阻尼器减震系统的动力学方程。提出了一种可行的计算分析方法,推导出时程分析的求解过程。同时,利用Matlab编写了相应的程序。对两级变阻尼粘性阻尼器进行了动态全尺寸试验,结果表明,滞回曲线完整,工作状态稳定。结果通过算例计算分析,结果表明,变阻尼粘性阻尼器减震体系对高柔性建筑的减震效果显著。利用所编制的程序分析了某广播塔在大地震作用下的变阻尼TMD系统的地震反应。结果表明,安装变阻尼粘性阻尼器可以有效控制TMD水箱的最大层间位移响应,并能有效地消耗地震能量。该方法可为TMD在风振控制中的安全有效运行提供保障。
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引用次数: 0
Crack localization in glass fiber composite beams by experimental modal analysis and multi variable Gaussian process regression method 通过实验模态分析和多变量高斯过程回归法确定玻璃纤维复合梁的裂缝位置
IF 2.7 Pub Date : 2023-12-05 DOI: 10.1108/ijsi-09-2023-0092
S. Rama Krishna, J. Sathish, Talari Rahul Mani Datta, S. Raghu Vamsi
PurposeEnsuring the early detection of structural issues in aircraft is crucial for preserving human lives. One effective approach involves identifying cracks in composite structures. This paper employs experimental modal analysis and a multi-variable Gaussian process regression method to detect and locate cracks in glass fiber composite beams.Design/methodology/approachThe present study proposes Gaussian process regression model trained by the first three natural frequencies determined experimentally using a roving impact hammer method with crystal four-channel analyzer, uniaxial accelerometer and experimental modal analysis software. The first three natural frequencies of the cracked composite beams obtained from experimental modal analysis are used to train a multi-variable Gaussian process regression model for crack localization. Radial basis function is used as a kernel function, and hyperparameters are optimized using the negative log marginal likelihood function. Bayesian conditional probability likelihood function is used to estimate the mean and variance for crack localization in composite structures.FindingsThe efficiency of Gaussian process regression is improved in the present work with the normalization of input data. The fitted Gaussian process regression model validates with experimental modal analysis for crack localization in composite structures. The discrepancy between predicted and measured values is 1.8%, indicating strong agreement between the experimental modal analysis and Gaussian process regression methods. Compared to other recent methods in the literature, this approach significantly improves efficiency and reduces error from 18.4% to 1.8%. Gaussian process regression is an efficient machine learning algorithm for crack localization in composite structures.Originality/valueThe experimental modal analysis results are first utilized for crack localization in cracked composite structures. Additionally, the input data are normalized and employed in a machine learning algorithm, such as the multi-variable Gaussian process regression method, to efficiently determine the crack location in these structures.
目的确保飞机结构问题的早期发现对保护人类生命至关重要。一种有效的方法是识别复合材料结构中的裂缝。本文采用试验模态分析和多变量高斯过程回归方法对玻璃纤维复合材料梁的裂纹进行检测和定位。采用晶体四通道分析仪、单轴加速度计和实验模态分析软件,采用粗纱冲击锤法实验确定的前三个固有频率训练高斯过程回归模型。利用试验模态分析得到的裂纹组合梁的前三个固有频率,训练了裂纹局部化的多变量高斯过程回归模型。采用径向基函数作为核函数,采用负对数边际似然函数对超参数进行优化。采用贝叶斯条件概率似然函数估计复合材料结构裂纹局部化的均值和方差。结果:通过对输入数据进行归一化处理,提高了高斯过程回归的效率。拟合的高斯过程回归模型对复合材料结构裂纹局部化进行了试验模态分析验证。预测值与实测值的差异为1.8%,表明实验模态分析方法与高斯过程回归方法具有较强的一致性。与近期文献中的其他方法相比,该方法显著提高了效率,并将误差从18.4%降低到1.8%。高斯过程回归是一种有效的复合材料结构裂纹定位机器学习算法。实验模态分析结果首次用于裂纹复合材料结构的裂纹定位。此外,输入数据被归一化并用于机器学习算法,如多变量高斯过程回归方法,以有效地确定这些结构中的裂纹位置。
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引用次数: 0
Research on anti-fatigue design method for welded joints of marine engineering equipment 海洋工程设备焊接接头抗疲劳设计方法研究
Pub Date : 2023-11-14 DOI: 10.1108/ijsi-09-2023-0087
Chunliang Niu
Purpose To obtain better fatigue resistance for marine engineering equipment welded joints in the design stage, the design method of the marine engineering equipment welded joint design stage needs to be studied. Design/methodology/approach Based on the structural stress theory, a design method of the marine engineering equipment welded joints with better fatigue performance is proposed. The effectiveness of the method is demonstrated through the simulation analysis and fatigue test of typical marine engineering equipment welded joints. Findings Methods based on the theoretical advantages of structural stress and the principle of ensuring that the welded joint has a low degree of stress concentration. Originality/value The design method of marine engineering equipment welded joints proposed in this study provides a set of operable design routes for technicians, which can better meet the needs of engineering applications.
目的为了使海洋工程设备焊接接头在设计阶段获得较好的抗疲劳性能,需要对海洋工程设备焊接接头设计阶段的设计方法进行研究。基于结构应力理论,提出了一种具有较好疲劳性能的海洋工程设备焊接接头的设计方法。通过对典型海洋工程设备焊接接头的仿真分析和疲劳试验,验证了该方法的有效性。方法基于结构应力的理论优势和保证焊接接头具有低应力集中程度的原则。本研究提出的海洋工程设备焊接接头设计方法为技术人员提供了一套可操作的设计路线,能更好地满足工程应用的需要。
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引用次数: 0
Machine learning-based probabilistic fatigue assessment of turbine bladed disks under multisource uncertainties 多源不确定性下基于机器学习的涡轮叶片叶片概率疲劳评估
Pub Date : 2023-11-07 DOI: 10.1108/ijsi-06-2023-0048
Shun-Peng Zhu, Xiaopeng Niu, Behrooz Keshtegar, Changqi Luo, Mansour Bagheri
Purpose The multisource uncertainties, including material dispersion, load fluctuation and geometrical tolerance, have crucial effects on fatigue performance of turbine bladed disks. In view of the aim of this paper, it is essential to develop an advanced approach to efficiently quantify their influences and evaluate the fatigue life of turbine bladed disks. Design/methodology/approach In this study, a novel combined machine learning strategy is performed to fatigue assessment of turbine bladed disks. Proposed model consists of two modeling phases in terms of response surface method (RSM) and support vector regression (SVR), namely RSM-SVR. Two different input sets obtained from basic variables were used as the inputs of RSM, then the predicted results by RSM in first phase is used as inputs of SVR model by using a group data-handling strategy. By this way, the nonlinear flexibility of SVR inputs is improved and RSM-SVR model presents the high-tendency and efficiency characteristics. Findings The accuracy and tendency of the RSM-SVR model, applied to the fatigue life estimation of turbine bladed disks, are validated. The results indicate that the proposed model is capable of accurately simulating the nonlinear response of turbine bladed disks under multisource uncertainties, and SVR-RSM model provides an accurate prediction strategy compared to RSM and SVR for fatigue analysis of complex structures. Originality/value The results indicate that the proposed model is capable of accurately simulate the nonlinear response of turbine bladed disks under multisource uncertainties, and SVR-RSM model provides an accurate prediction compared to RSM and SVRE for fatigue analysis of turbine bladed disk.
材料弥散、载荷波动和几何容差等多源不确定性对涡轮叶片的疲劳性能有重要影响。鉴于本文的目的,有必要发展一种先进的方法来有效地量化它们的影响并评估涡轮叶片的疲劳寿命。设计/方法/方法在本研究中,采用一种新的组合机器学习策略对涡轮叶片盘进行疲劳评估。该模型包括响应面法(RSM)和支持向量回归(SVR)两个建模阶段,即RSM-SVR。将基本变量得到的两个不同的输入集作为RSM的输入,然后采用分组数据处理策略将RSM在第一阶段的预测结果作为SVR模型的输入。这种方法提高了SVR输入的非线性灵活性,使RSM-SVR模型具有高倾向性和高效率的特点。结果验证了RSM-SVR模型在涡轮叶片疲劳寿命估计中的准确性和倾向性。结果表明,该模型能够准确地模拟多源不确定性条件下涡轮叶片盘的非线性响应,与RSM和SVR模型相比,SVR-RSM模型为复杂结构的疲劳分析提供了更准确的预测策略。结果表明,该模型能够准确模拟多源不确定性条件下涡轮叶片的非线性响应,与RSM和SVRE模型相比,SVR-RSM模型对涡轮叶片的疲劳分析提供了更准确的预测。
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引用次数: 0
期刊
International Journal of Structural Integrity
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