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Human experience-guided reinforcement learning for carrier-based aircraft support operation scheduling 基于人类经验引导的舰载机保障调度强化学习
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.07.016
Xudong Chen , Yizhe Luo , Qihang Sun , Wenxiao Guo , Zhao Jin , Shuo Feng , Yucheng Shi , Mingliang Xu
The efficiency of carrier-based aircraft support operation scheduling critically impacts aircraft carrier operational effectiveness by determining sortie generation rates, yet faces significant challenges in complex deck environments characterized by resource coupling, dynamic constraints, and high-dimensional state-action spaces. Traditional optimization algorithms and vanilla reinforcement learning (RL) struggle with computational inefficiency, sparse rewards, and adaptability to dynamic scenarios, while human expert systems are constrained by the quality of expert knowledge, and poor expert guidance may even have a negative impact. To address these limitations, this paper proposes a human experience-guided actor-critic reinforcement learning framework that synergizes domain expertise with adaptive learning. First, a dynamic Markov decision process (MDP) model is developed to rigorously simulate carrier deck operations, explicitly encoding constraints on positions, resources, and collision avoidance. Building upon this foundation, a human experience database is constructed to enable real-time pattern-matching-based intervention during agent-environment interactions, dynamically correcting wrong actions to avoid catastrophic states while refining exploration efficiency. Finally, the policy and value network objectives are reshaped to incorporate human intent through hybrid reward functions and adaptive guidance weighting, ensuring balanced integration of expert knowledge with RL's exploration capabilities. Extensive simulations across three scenarios demonstrate superior performance compared to state-of-the-art methods and maintain robustness under suboptimal human guidance. These results validate the framework's ability to harmonize human expertise with adaptive learning, offering a practical solution for real-world carriers.
舰载机保障调度的效率通过决定出动架次生成率对航母作战效能产生重大影响,但在资源耦合、动态约束和高维状态-行动空间等复杂甲板环境中面临重大挑战。传统的优化算法和香草强化学习(RL)努力解决计算效率低下、奖励稀疏和对动态场景的适应性等问题,而人类专家系统受到专家知识质量的限制,糟糕的专家指导甚至可能产生负面影响。为了解决这些限制,本文提出了一个人类经验引导的行为者-评论家强化学习框架,该框架将领域专业知识与自适应学习协同起来。首先,开发了动态马尔可夫决策过程(MDP)模型,严格模拟航母甲板操作,明确编码位置、资源和避碰约束。在此基础上,构建了一个人类经验数据库,以便在智能体与环境交互期间实现基于模式匹配的实时干预,动态纠正错误行为以避免灾难性状态,同时提高勘探效率。最后,通过混合奖励功能和自适应引导权重,重塑政策和价值网络目标,以融入人类意图,确保专家知识与强化学习的探索能力的平衡整合。与最先进的方法相比,三种场景的广泛模拟显示了优越的性能,并在次优人类指导下保持了鲁棒性。这些结果验证了该框架协调人类专业知识与自适应学习的能力,为现实世界的运营商提供了实用的解决方案。
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引用次数: 0
Energy learning hyper-heuristic algorithm for cooperative task assignment of heterogeneous UAVs under complex constraints 复杂约束下异构无人机协同任务分配的能量学习超启发式算法
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.06.006
Mengshun Yuan, Mou Chen, Tongle Zhou, Zengliang Han
Cooperative task assignment is one of the key research focuses in the field of unmanned aerial vehicles (UAVs). In this paper, an energy learning hyper-heuristic (EL-HH) algorithm is proposed to address the cooperative task assignment problem of heterogeneous UAVs under complex constraints. First, a mathematical model is designed to define the scenario, complex constraints, and objective function of the problem. Then, the scheme encoding, the EL-HH strategy, multiple optimization operators, and the task sequence and time adjustment strategies are designed in the EL-HH algorithm. The scheme encoding is designed with three layers: task sequence, UAV sequence, and waiting time. The EL-HH strategy applies an energy learning method to adaptively adjust the energies of operators, thereby facilitating the selection and application of operators. Multiple optimization operators can update schemes in different ways, enabling the algorithm to fully explore the solution space. Afterward, the task order and time adjustment strategies are designed to adjust task order and insert waiting time. Through the iterative optimization process, a satisfactory assignment scheme is ultimately produced. Finally, simulation and experiment verify the effectiveness of the proposed algorithm.
协同任务分配是无人机领域的研究热点之一。针对复杂约束条件下异构无人机的协同任务分配问题,提出了一种能量学习超启发式(EL-HH)算法。首先,设计数学模型来定义问题的场景、复杂约束和目标函数。然后,在EL-HH算法中设计了方案编码、EL-HH策略、多优化算子以及任务序列和时间调整策略。方案编码分为任务序列、无人机序列和等待时间三层。EL-HH策略采用能量学习方法自适应调整算子的能量,从而方便算子的选择和应用。多个优化算子可以以不同的方式更新方案,使算法能够充分探索解空间。然后,设计任务顺序和时间调整策略,调整任务顺序,插入等待时间。通过迭代优化过程,最终得到满意的分配方案。最后,通过仿真和实验验证了该算法的有效性。
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引用次数: 0
Analytical model of the perforation process of spherical-nosed projectiles impacting finite-thickness metal plates 球头弹丸冲击有限厚度金属板穿孔过程的分析模型
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.07.018
Yiding Wu, Wencheng Lu, Minghui Ma, Yilei Yu, Xinyi Sun, Guangfa Gao
This study presents a theoretical analysis of the perforation process of finite-thickness metal plates (with a thickness ratio of T0/D = 0.6–1.5) under normal impact by spherical-nosed projectiles. The model is validated over an impact velocity range of 180–1247 m/s. The entire penetration process is divided into three stages: the crater formation stage, the steady stage, and the shear stage. A thickness-dependent dynamic cavity expansion resistance model is first introduced to quantitatively describe the axial resistance experienced by the projectile during the tip-entry and steady stages. Subsequently, a thickness-related damage parameter is proposed to refine the resistance expression during the transition from the steady stage to the shear stage, thereby eliminating discontinuities in resistance across stages. When the projectile fully perforates the target, the model predicts a gradual decay of resistance to zero as the residual ligament thickness vanishes, which better reflects the actual physical behavior. The model is validated using four sets of experimental conditions. In addition, to illustrate the model's applicability more intuitively, a numerical simulation case from the literature is reproduced, and the resulting resistance-time curve is compared with the model output. The results demonstrate that the proposed model agrees well with experimental data in terms of residual velocity, ballistic limit, and penetration resistance. Finally, a method for adjusting the threshold parameter within the resistance function is provided, and the influence of this coefficient on the model predictions is discussed.
本研究对有限厚度金属板(厚度比T0/D = 0.6 ~ 1.5)在球头弹丸法向冲击下的穿孔过程进行了理论分析。在180 - 1247m /s的冲击速度范围内对模型进行了验证。整个侵彻过程分为三个阶段:成坑阶段、稳定阶段和剪切阶段。首先建立了一种随厚度变化的动态空腔膨胀阻力模型,定量描述了弹丸在尖端进入和稳定阶段所经历的轴向阻力。随后,提出了一个与厚度相关的损伤参数,以细化从稳定阶段过渡到剪切阶段的阻力表达式,从而消除了阶段间阻力的不连续。当弹丸完全穿靶时,模型预测随着残余韧带厚度的消失,阻力逐渐衰减为零,更能反映实际物理行为。采用四组实验条件对模型进行了验证。此外,为了更直观地说明模型的适用性,本文重现了文献中的一个数值模拟案例,并将所得电阻-时间曲线与模型输出进行了比较。结果表明,该模型在残余速度、弹道极限和侵彻阻力等方面与实验数据吻合较好。最后,给出了在阻力函数内调整阈值参数的方法,并讨论了该系数对模型预测的影响。
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引用次数: 0
Numerical investigation of the propagation characteristics of H2-F2-Air fueled rotating detonation waves h2 - f2 -空气燃料旋转爆震波传播特性的数值研究
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.04.022
Xinzhe Jiang, Baoxing Li, Yanjing Yang, Jianming Yang, Xiaohong Zhang
The incorporation of fluorine (F2) into hydrogen-air (H2/Air) mixtures presents a novel approach to enhancing the performance of rotating detonation engines (RDEs). This study systematically investigates the effects of F2 concentration and inlet mass flow rate on rotating detonation wave (RDW) propagation using two-dimensional numerical simulations, providing the first comprehensive analysis of F2 as an oxidizing additive in regulating detonation performance, propagation stability, and heat release dynamics in RDEs. The results indicate that when F2 concentration is below 1%, the flow field primarily exhibits a stable single-wave propagation mode. As F2 concentration increases, RDW performance initially improves but then deteriorates, reaching its optimal state at 0.8% F2. When F2 concentration exceeds 1%, the coupled effects of F2 concentration and inlet mass flow rate induce a transition from single-wave to multi-wave propagation modes. While a higher inlet mass flow rate promotes increased wave numbers, it also intensifies wave-wave interactions. With further increases in F2 concentration, the enhanced heat release leads to intensified local deflagration, frequent hotspot formation, and wave collisions, ultimately degrading RDW performance and destabilizing the multi-wave flow field. Moreover, excessive HF formation is identified as a critical driver of enhanced deflagration, hotspot generation, and the disruption of multi-wave stability. These findings provide a theoretical foundation for integrating F2 additives into H2/Air-based RDE systems.
将氟(F2)加入到氢-空气(H2/Air)混合物中,为提高旋转爆震发动机(RDEs)的性能提供了一种新的方法。本研究通过二维数值模拟系统地研究了F2浓度和进口质量流量对旋转爆震波(RDW)传播的影响,首次全面分析了F2作为氧化添加剂对旋转爆震波(RDW)爆轰性能、传播稳定性和热释放动力学的调节作用。结果表明:当F2浓度低于1%时,流场主要表现为稳定的单波传播模式;随着F2浓度的增加,RDW性能先提高后下降,在F2浓度为0.8%时达到最佳状态。当F2浓度超过1%时,F2浓度与进口质量流量的耦合作用导致其传播模式由单波向多波转变。较高的进口质量流量促进了波数的增加,同时也加剧了波与波的相互作用。随着F2浓度的进一步增加,放热增强导致局部爆燃加剧,热点形成频繁,波浪碰撞频繁,最终降低RDW性能,破坏多波流场的稳定。此外,过量HF的形成被认为是爆燃增强、热点产生和多波稳定性破坏的关键驱动因素。这些研究结果为将F2添加剂整合到H2/ air基RDE体系中提供了理论基础。
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引用次数: 0
Electric explosion characteristics of multi-point series explosion foil initiator 多点串联爆炸箔起爆器的电爆炸特性
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.07.023
Zheng Ning , Lirong Bao , Ang Li , Songmao Zhao , Zeyu Cheng , Peng Zhu , Ruiqi Shen
Investigating the characteristics of synchronous electrical explosions of multiple exploding foil initiators (EFI) in the same circuit, a four-point series-connected EFI circuit utilizing flexible flat cables was designed to analyze the electrical explosion characteristics. Loop current and terminal voltages of each EFI were recorded to characterize the multi-point series-connected EFI explosion. The effects of voltage, capacitance, and loop length on the response time, energy deposition, and energy utilization efficiency of the multi-point series-connected EFI were explored. Based on the FIRESET model, a mathematical model for the multi-point series-connected EFI explosion was developed, and the influence of initial resistivity on the peak voltage during electrical explosion was quantitatively analyzed. Results indicate that the primary factor influencing the response time is the conduction performance of the switch, while the synchronization deviation is minimally affected by variations in voltage and capacitance. At an inter-electrode spacing of 50 mm, within the voltage range of 1,500–3,000 V and capacitance range of 0.22–1.5 μF, the minimum and maximum synchronization deviations of the four-point EFI were 2 ns and 11 ns, respectively. As input energy increases, the deposited energy of the EFI rises, but the overall energy utilization efficiency decreases. The computational results of the proposed model align well with the experimental data. Furthermore, higher initial resistivity in the series-connected circuit corresponds to a higher peak voltage during electrical explosion. This work elucidates the characteristics of multi-point series-connected EFI explosions, offering valuable insights for the design of multi-point EFI circuits.
为研究同一电路中多个爆炸箔起爆器的同步电爆炸特性,设计了一种采用柔性扁平电缆的四点串联电喷电路,分析其电爆炸特性。记录每个电喷器的回路电流和端子电压,以表征多点串联电喷爆炸。探讨了电压、电容和回路长度对多点串联电喷系统的响应时间、能量沉积和能量利用效率的影响。基于FIRESET模型,建立了多点串联电喷爆炸的数学模型,定量分析了电爆炸时初始电阻率对峰值电压的影响。结果表明,影响同步时间的主要因素是开关的导通性能,而同步偏差受电压和电容变化的影响最小。当电极间距为50 mm,电压范围为1500 ~ 3000 V,电容范围为0.22 ~ 1.5 μF时,四点式电喷的同步偏差最小为2 ns,最大为11 ns。随着输入能量的增加,电喷系统的沉积能量增加,但整体能量利用效率降低。该模型的计算结果与实验数据吻合较好。此外,串联电路中较高的初始电阻率对应于电爆炸时较高的峰值电压。本工作阐明了多点串联电喷爆炸的特点,为多点电喷电路的设计提供了有价值的见解。
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引用次数: 0
Thermochemical characteristics of Ce95Al5 material and perforation behavior of its liner on steel targets Ce95Al5材料的热化学特性及其衬板在钢靶上的穿孔行为
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.05.017
Liang Mao , Peiying Li , Guitao Liu , Xiongbo Feng , Yitong Liu , Zirui Jiang , Chunlan Jiang , Baolin Wang
Cerium-aluminum (CeAl) alloy is promising reactive structural materials (RSMs) with significant potential for liner applications. To investigate the thermochemical characteristics of CeAl alloy and the perforation behavior of its liner impacting steel targets, a CeAl alloy liner with 5 wt% Al content was fabricated, with a cerium (Ce) liner and a copper (Cu) liner used as control. The microstructure and elemental distribution of the CeAl alloy were analyzed using SEM, EDS, and XRD. The thermochemical reaction mechanism of the CeAl alloy was examined through TG-DSC. Penetration experiments were conducted to explore the combined effects of invasion and implosion of CeAl alloy liner against steel target. The results indicate that the addition of Al leads to the formation of Ce3Al intermetallic compounds in the alloy and reduces the apparent activation energy of the Ce-based alloy by around 53.17%, thereby facilitating energy release. The presence of 5 wt% Al increases the calorific value by approximately 24.5%, and this change allows the oxidation process to be divided into three distinct stages. Compared to an inert copper liner, the average penetration diameter of the CeAl5 reactive alloy liner increases by around 42.78%. Furthermore, when compared to the Ce liner, the penetration depth of the CeAl5 reactive alloy liner increases by approximately 82.64%.
铈铝(CeAl)合金是一种很有前途的反应结构材料,在衬垫领域具有很大的应用潜力。为了研究CeAl合金的热化学特性及其衬垫冲击钢靶的穿孔行为,制备了Al含量为5wt %的CeAl合金衬垫,以铈(Ce)衬垫和铜(Cu)衬垫为对照。采用扫描电镜(SEM)、能谱仪(EDS)和x射线衍射仪(XRD)分析了CeAl合金的微观组织和元素分布。采用TG-DSC对CeAl合金的热化学反应机理进行了研究。通过侵彻实验,探讨了CeAl合金衬垫对钢靶的侵彻和内爆联合作用。结果表明:Al的加入导致合金中Ce3Al金属间化合物的形成,使ce基合金的表观活化能降低约53.17%,有利于能量的释放;5 wt% Al的存在使热值增加约24.5%,这种变化使氧化过程分为三个不同的阶段。与惰性铜衬垫相比,CeAl5活性合金衬垫的平均穿透直径增加了约42.78%。此外,与Ce衬垫相比,CeAl5反应合金衬垫的渗透深度提高了约82.64%。
{"title":"Thermochemical characteristics of Ce95Al5 material and perforation behavior of its liner on steel targets","authors":"Liang Mao ,&nbsp;Peiying Li ,&nbsp;Guitao Liu ,&nbsp;Xiongbo Feng ,&nbsp;Yitong Liu ,&nbsp;Zirui Jiang ,&nbsp;Chunlan Jiang ,&nbsp;Baolin Wang","doi":"10.1016/j.dt.2025.05.017","DOIUrl":"10.1016/j.dt.2025.05.017","url":null,"abstract":"<div><div>Cerium-aluminum (CeAl) alloy is promising reactive structural materials (RSMs) with significant potential for liner applications. To investigate the thermochemical characteristics of CeAl alloy and the perforation behavior of its liner impacting steel targets, a CeAl alloy liner with 5 wt% Al content was fabricated, with a cerium (Ce) liner and a copper (Cu) liner used as control. The microstructure and elemental distribution of the CeAl alloy were analyzed using SEM, EDS, and XRD. The thermochemical reaction mechanism of the CeAl alloy was examined through TG-DSC. Penetration experiments were conducted to explore the combined effects of invasion and implosion of CeAl alloy liner against steel target. The results indicate that the addition of Al leads to the formation of Ce<sub>3</sub>Al intermetallic compounds in the alloy and reduces the apparent activation energy of the Ce-based alloy by around 53.17%, thereby facilitating energy release. The presence of 5 wt% Al increases the calorific value by approximately 24.5%, and this change allows the oxidation process to be divided into three distinct stages. Compared to an inert copper liner, the average penetration diameter of the CeAl<sub>5</sub> reactive alloy liner increases by around 42.78%. Furthermore, when compared to the Ce liner, the penetration depth of the CeAl<sub>5</sub> reactive alloy liner increases by approximately 82.64%.</div></div>","PeriodicalId":58209,"journal":{"name":"Defence Technology(防务技术)","volume":"54 ","pages":"Pages 177-187"},"PeriodicalIF":5.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145705815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Energetic composites based on aluminium alloy fuels (Al-Ti and Al-Mg) with polyvinylidene fluoride (PVDF): An in-depth study of the fabrication, structure, combustion properties and reaction kinetics 基于铝合金燃料(Al-Ti和Al-Mg)和聚偏氟乙烯(PVDF)的高能复合材料:对其制备、结构、燃烧性能和反应动力学进行了深入研究
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-12-01 DOI: 10.1016/j.dt.2025.07.017
Zhanjun Yang , Hao Liu , Mi Li , Xiaoqian Wang , Yang Li , Zhongxuan Han , Ajay V. Singh , Lin Jiang , Andrei Rotaru
This study investigates the combustion characteristics of reactive aluminium alloys in combination with fluoropolymer oxidizers. Aluminium-magnesium (Al-Mg) and aluminium-titanium (Al-Ti) alloys were selected as metallic fuels, while polyvinylidene fluoride (PVDF) was employed as the oxidizer. Composite samples were prepared using two methods: electrostatic spraying (ES) and physical mixing (PM). The ES method yielded samples with a PVDF-coated structure, whereas the PM method produced simple mixtures. The samples and their combustion products were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), combustion experiments, and thermal analysis. The results indicate that compared to the PM samples, the ES-coated samples exhibited more effective dispersion of metallic particles, reduced particle agglomeration, increased combustion heat release temperature, decreased maximum flame area and height, and mitigated or eliminated explosive or micro-explosive phenomena during combustion, thereby achieving stable combustion. Additionally, the ES samples demonstrated a significant reduction in the particle size of condensed-phase products after combustion, alleviated sintering and agglomeration, decreased the formation of metal oxides, and minimized residual metallic fuel, allowing for the full release of combustion heat. Thermal analysis revealed that the coating structure of the ES samples lowered the activation energy for the reaction between the metallic fuel and PVDF, thereby enhancing the chemical reactivity.
研究了活性铝合金与含氟聚合物氧化剂复合时的燃烧特性。选择铝镁(Al-Mg)和铝钛(Al-Ti)合金作为金属燃料,聚偏氟乙烯(PVDF)作为氧化剂。采用静电喷涂(ES)和物理混合(PM)两种方法制备复合样品。ES方法得到的样品具有pvdf涂层结构,而PM方法产生的样品是简单的混合物。利用扫描电镜(SEM)、x射线衍射(XRD)、燃烧实验和热分析对样品及其燃烧产物进行了表征。结果表明:与PM样品相比,es包覆样品金属颗粒的分散更有效,颗粒团聚减少,燃烧放热温度升高,最大火焰面积和火焰高度降低,燃烧过程中爆炸或微爆炸现象减轻或消除,从而实现稳定燃烧。此外,ES样品显示燃烧后冷凝相产物的粒径显著减小,减轻了烧结和团聚,减少了金属氧化物的形成,最小化了残余金属燃料,使燃烧热充分释放。热分析表明,ES样品的涂层结构降低了金属燃料与PVDF反应的活化能,从而提高了化学反应活性。
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引用次数: 0
Stress waves in concrete targets induced by hypervelocity projectile penetration: an experimental and numerical investigation 超高速弹丸侵彻混凝土靶的应力波:实验与数值研究
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.004
Shangbin Yang , Xiangzhen Kong , Qin Fang , Yong Peng
With the application of hypervelocity weapons in warfare, comprehensively evaluating their destructive effects is of particular interest for protective engineering. Existing studies mostly focused on the depth of penetration by hypervelocity projectile, while investigation on stress waves associated with hypervelocity penetration was very limited. To clarify the generation and propagation of stress waves in concrete targets induced by hypervelocity projectile penetration, in the present study, six spherical projectile penetration tests on concrete targets were firstly conducted with projectile velocity ranged from 1875 m/s to 3940 m/s, in which the stress waves were carefully measured by the PVDF transducers. Then corresponding numerical models were developed and validated, and based on the validated numerical model the mechanisms of generation and propagation of stress waves were clarified. It was found that the stress waves observed during hypervelocity penetration are generated by the continuous interactions of projectile and target during penetration, and have unique characteristics such as the directionality and the "two peaks" phenomenon when compared with the stress waves generated by charge explosion. Finally, the effects of projectile velocity, projectile material, and target strength on the stress waves below the penetration depth were numerically investigated, and two important indexes for evaluating the stress waves by hypervelocity penetration were proposed.
随着超高速武器在战争中的应用,对其破坏效果进行综合评估是防护工程的一个重要课题。现有的研究主要集中在超高速弹丸侵彻深度上,而对超高速侵彻过程中应力波的研究非常有限。为了阐明超高速弹丸侵彻混凝土靶体中应力波的产生和传播规律,本研究首先对混凝土靶体进行了6次球面弹丸侵彻试验,弹丸速度范围为1875 ~ 3940 m/s,并利用PVDF传感器对应力波进行了详细测量。建立并验证了相应的数值模型,在此基础上阐明了应力波的产生和传播机理。研究发现,超高速侵彻过程中观测到的应力波是由侵彻过程中弹与靶的连续相互作用产生的,与装药爆炸产生的应力波相比,具有方向性和“双峰”现象等独特特征。最后,对弹丸速度、弹丸材料和靶材强度对侵彻深度以下应力波的影响进行了数值研究,并提出了评价超高速侵彻应力波的两个重要指标。
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引用次数: 0
A position distribution measurement method and mathematical modeling of two projectiles simultaneous hitting target based on three photoelectric encoder detection screens 基于三光电编码器检测屏的两弹同时命中目标位置分布测量方法及数学建模
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.013
Hanshan Li, Zixuan Cao, Xiaoqian Zhang
To solve the problem of identification and measurement of two projectiles hitting the target at the same time, this paper proposes a projectile coordinate test method combining three photoelectric encoder detection screens, and establishes a coordinate calculation model for two projectiles to reach the same detection screen at the same time. The design method of three photoelectric encoder detection screens and the position coordinate recognition algorithm of the blocked array photoelectric detector when projectile passing through the photoelectric encoder detection screen are studied. Using the screen projection method, the intersected linear equation of the projectile and the line laser with the main detection screen as the core coordinate plane is established, and the projectile coordinate data set formed by any two photoelectric encoder detection screens is constructed. The principle of minimum error of coordinate data set is used to determine the coordinates of two projectiles hitting the target at the same time. The rationality and feasibility of the proposed test method are verified by experiments and comparative tests.
为解决两枚弹丸同时命中目标的识别与测量问题,本文提出了一种结合三个光电编码器探测屏的弹丸坐标测试方法,并建立了两枚弹丸同时到达同一探测屏的坐标计算模型。研究了三种光电编码器检测屏的设计方法,以及弹丸通过光电编码器检测屏时阻塞阵光电探测器的位置坐标识别算法。采用屏幕投影法,建立以主检测屏为核心坐标平面的弹丸与直线激光器的相交线性方程,构造任意两个光电编码器检测屏形成的弹丸坐标数据集。利用坐标数据集误差最小原则确定两弹同时命中目标的坐标。通过实验和对比试验,验证了所提测试方法的合理性和可行性。
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引用次数: 0
Enhanced XGBoost algorithm with multi-objective optimization for blast-induced response forecasting of RC slabs 基于多目标优化的增强XGBoost算法的混凝土楼板爆破响应预测
IF 5.9 Q1 ENGINEERING, MULTIDISCIPLINARY Pub Date : 2025-11-01 DOI: 10.1016/j.dt.2025.07.012
Meng Liu , Xuke Lan , Chenxi Bian , Zhiyu Ma , Shuai Ma , Guangyan Huang
Amid increasingly frequent military conflicts and explosion events, accurately predicting the dynamic response of reinforced concrete (RC) slabs, key load-bearing components in building structures, is essential for understanding blast-induced damage and enhancing structural protection. However, current approaches predominantly rely on experimental tests, finite element (FE) simulations, and conventional machine learning (ML) techniques, which are often costly, inefficient, narrowly applicable, and insufficiently accurate. To overcome these challenges, this study aims to optimize ML models, refine architectural designs, and improve model interpretability. A comprehensive dataset comprising 489 samples was constructed by integrating experimental and simulation data from existing literature, incorporating 15 input features and one target variable. Based on this dataset, a novel method, termed MOPSO-TXGBoost, was proposed. Building on XGBoost as a baseline, the method employs multi-objective particle swarm optimization (MOPSO) for hyperparameter tuning, introduces a tri-stream stacking architecture to enhance feature representation, and trains three distinct models to improve generalization performance. A weighted fusion strategy is employed to further enhance the accuracy of prediction. Additionally, a model comprehensive evaluation (MCE) index is introduced, which integrates error metrics and fitting performance to facilitate systematic model assessment. Experimental results indicate that, compared with the baseline XGBoost model, the proposed approach reduces prediction error by 61.4% and increases the coefficient of determination (R2) by 0.217. Moreover, it outperforms several mainstream machine learning (ML) algorithms. The findings of this study advance ML-based blast damage prediction and provide theoretical support for safety assessment and protection optimization of RC slab structures.
在日益频繁的军事冲突和爆炸事件中,准确预测建筑结构关键承重构件钢筋混凝土板的动力响应,对于认识爆炸损伤和加强结构防护至关重要。然而,目前的方法主要依赖于实验测试、有限元(FE)模拟和传统的机器学习(ML)技术,这些技术通常成本高、效率低、适用范围窄,而且不够准确。为了克服这些挑战,本研究旨在优化机器学习模型,改进架构设计,并提高模型的可解释性。通过整合已有文献的实验和仿真数据,构建了包含489个样本的综合数据集,其中包含15个输入特征和1个目标变量。在此基础上,提出了一种新的方法MOPSO-TXGBoost。该方法以XGBoost为基准,采用多目标粒子群优化(MOPSO)进行超参数调优,引入三流叠加架构增强特征表示,并训练三个不同的模型来提高泛化性能。采用加权融合策略进一步提高预测精度。此外,还引入了模型综合评价指标(MCE),该指标综合了误差指标和拟合性能,便于对模型进行系统评价。实验结果表明,与基线XGBoost模型相比,该方法的预测误差降低了61.4%,决定系数(R2)提高了0.217。此外,它优于几种主流机器学习(ML)算法。研究结果进一步推进了基于ml的爆炸损伤预测,为钢筋混凝土板结构的安全评价和防护优化提供了理论支持。
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引用次数: 0
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