浅埋爆炸下考虑乘员安全的防雷底板设计理论模型  

Theoretical model of armored vehicle bottom plate subjected to detonation of shallow-buried explosives,with occupant safety considered

作　　者：张杜江 赵振宇[1,2] 褚庆国 贺良 任建伟 卢天健 ZHANG Dujiang;ZHAO Zhenyu;CHU Qingguo;HE Liang;REN Jianwei;LU Tianjian(State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,210016 Nanjing,China;MIIT Key Laboratory of Multifunctional Lightweight Materials and Structures(MLMS),Nanjing University of Aeronautics and Astronautics,210016 Nanjing,China;Beijing Special Vehicle Research Institute,100072 Beijing,China;State Key Laboratory of Smart Manufacturing for Special Vehicles and Transmission System,Inner Mongolia First Machinery Group Co.,014030 Baotou,China)

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室,南京210016 [2]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 [3]北京特种车辆研究所,北京100072 [4]内蒙古第一机械集团有限公司特种车辆及其传动系统智能制造国家重点实验室,包头014030

出　　处：《应用力学学报》2024年第4期786-796,共11页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金资助项目(No.11972185,12002156)。

摘　　要：浅埋爆炸载荷下,为更好地开展装甲车防雷底板设计,建立了考虑附加质量-弹簧-阻尼系统的均质梁动态响应理论模型,并采用有限元仿真分析进行验证,理论与仿真结果吻合良好。基于所建立理论模型,分别讨论了炸药质量、均质梁屈服强度、弹簧刚度、阻尼系数和边界条件对均质梁中点和质量块峰值位移、速度、加速度的影响。结果表明:随着TNT质量增大和均质梁屈服强度减小,均质梁中点峰值位移、质量块峰值位移、速度、加速度都增大;当弹簧刚度相同时,随着阻尼系数的增加,均质梁中点峰值位移减小,质量块峰值加速度增大;当阻尼系数一定时,弹簧刚度对均质梁中点的峰值位移和质量块峰值加速度影响较小;针对不同弹簧刚度,选择适当的阻尼系数可以降低质量块峰值速度。When subjected to shallow-buried explosions,a theoretical model was established to characterize the dynamic response of a mass-spring-damping system attached to a monolithic beam.For validation,numerical simulations with the method of finite elements were performed,with good agreement between theoretical and numerical results achieved.The model was then employed to quantify the effects of explosive mass,yield stress of beam material,spring stiffness,damping coefficient,and boundary condition on peak displacement,velocity and acceleration of the beam and the supported mass.With increasing explosion mass or decreasing yield stress,the peak displacement,velocity and acceleration of both the beam and mass increased.When the spring stiffness was constant,with the increase of damping coefficient,the peak displacement of the midpoint decreased,and the peak acceleration of mass increased.When the damping coefficient remained constant,the spring stiffness had little effect on the peak displacement of the beam and the peak acceleration of the mass.As the spring stiffness was varied,selecting a proper damping coefficient could reduce the peak velocity of the mass.With occupant safety considered,the proposed model provides useful design guidance for designing high-performance protective structures for armored vehicles.

关 键 词：浅埋爆炸 防雷底板 乘员 理论模型 质量-弹簧-阻尼系统 

分 类 号：O347.1[理学—固体力学]