高速冲击载荷下考虑乘员安全的均质梁动态响应  

Dynamic Responses of a Monolithic Beam Subjected to High-Velocity Impact Loading,With Occupant Safety Considered

作　　者：张杜江 赵振宇[2,3] 张智扬 高辉遥 卢天健 ZHANG Dujiang;ZHAO Zhenyu;ZHANG Zhiyang;GAO Huiyao;LU Tianjian(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,P.R.China;State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China;MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures(MLMS),Nanjing University of Aeronautics and Astronautics,Nanjing 210016,P.R.China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500 [2]南京航空航天大学航空航天结构力学及控制全国重点实验室,南京210016 [3]南京航空航天大学多功能轻量化材料与结构工业和信息化部重点实验室,南京210016

出　　处：《应用数学和力学》2025年第3期271-282,共12页Applied Mathematics and Mechanics

基　　金：国家自然科学基金(11972185,12002156)。

摘　　要：为了提升装甲车防护结构抗爆性能,保障乘员生命安全,开展了高速冲击载荷下考虑乘员安全的均质梁动态响应研究.首先,基于泡沫铝弹丸冲击均质梁-弹簧-质量块样件实验工装,测量了不同冲击速度下的质量块位移随时间变化曲线;然后,建立了相应的数值模型进行仿真计算,并开展理论计算,当泡沫铝弹丸速度较高时,仿真、实验与理论结果吻合较好;最后,基于验证的数值仿真方法,系统讨论了泡沫铝弹丸冲击速度、质量块质量、弹簧刚度和阻尼系数对质量块峰值位移、峰值加速度的影响.结果表明:随着泡沫铝弹丸速度增大,质量块峰值位移、峰值加速度都增大;质量块峰值位移对质量块质量、弹簧刚度变化不敏感;质量块峰值加速度随其质量增加而降低,随弹簧刚度、阻尼系数增加而增加.研究结果验证了理论和仿真方法的正确性,为使用理论、仿真方法快速设计高速冲击载荷下的高性能防护结构提供了支撑.To improve the protective structure design of armored vehicles against intensive blast loadings and ensure the safety of occupants, the dynamic responses of a monolithic beam subjected to impact loading, with occupant safety considered, was studied. First, experiments were carried out to characterize the dynamic performances of the monolithic beam attached with a mass-spring-damping system subjected to foam projectile impact. Then, the numerical simulations and theoretical analysis were conducted. At a relatively high foam projectile velocity, there is good agreement between numerical, experimental and theoretical results. The effects of the foam projectile velocity, the block mass, the spring stiffness, and the damping coefficient on the peak displacements and accelerations of the mass block were discussed by means of the numerical model. The results show that, the peak displacements and accelerations of the mass block increase with the foam projectile velocity. The block mass and the spring stiffness have little effect on the peak displacements and accelerations of the mass block. The peak accelerations of the mass block decrease with the block mass, but increase with the spring stiffness and the damping coefficient. The theoretical and numerical methods have verified correctness, providing a support for the rapid design of high-performance protective structures against intensive impact loads.

关 键 词：冲击 乘员安全 质量-弹簧-阻尼系统 动态响应 

分 类 号：O347.1[理学—固体力学]