爆炸冲击波作用下车载炮驾驶室结构动态响应数值仿真  

Numerical Simulation of Dynamic Response of Cabin Structure of Vehicle-mounted Howitzers Under Explosion Shock Wave

作　　者：倪鸿 徐亚栋[1] 魏胜程 NI Hong;XU Yadong;WEI Shengcheng(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《弹道学报》2024年第3期101-110,共10页Journal of Ballistics

摘　　要：地雷、简易爆炸装置和路边炸弹已成为车载炮的严重威胁,地雷爆炸产生的冲击波会对车载炮驾驶室结构造成损伤并危害乘员的生命安全。由于驾驶室底部不同位置地雷爆炸产生的冲击波对驾驶室的响应差异较大,该文对车载炮驾驶室底部在6个爆炸冲击工况下的响应过程进行数值仿真,采用ALE算法建立土壤、空气和炸药模型,Lagrange算法建立车载炮驾驶室和底盘模型,并使用流固耦合算法计算爆炸冲击波传播过程,以及在此过程中车载炮驾驶室的动态响应。分析乘员脚部位置底板处的冲击波压力、加速度和速度变化情况,得到乘员脚部位置底板处的最大冲击波压力、加速度和速度,分析最恶劣工况下的驾驶室结构的损伤情况。仿真结果表明,地雷产生的冲击波使驾驶室底板产生较大的加速度和速度,驾驶室结构发生破坏,乘员在此情况下会受到伤害,有必要针对车载炮驾驶室增加防护结构。仿真结果可以为车载炮驾驶室防护结构设计提供参考。Mines,improvised explosive devices and roadside bombs have become serious threat to vehicle-mounted howitzers(VMH),and the blast wave generated by mine explosion can also cause damage to the cab structure of VMH and endanger the life safety of crew.Because of the significant difference in the response of the shock wave generated by the mines explosion at different positions at the bottom of the cab,numerical simulation of the response process of the cab bottom of VMH under six explosion-shock conditions was carried out.ALE algorithm was used to establish models of soil,air and explosive,and Lagrange algorithm was used to establish the models of cab and chassis of VMH,and the fluid-solid coupling algorithm was used to calculate the propagation process of the explosion-shock wave,as well as the dynamic response of the cab of VMH in this process.The changes of shock-wave pressure,acceleration and velocity at the bottom plate of the passenger s foot position were analyzed,and the maximum shock-wave pressure,acceleration and velocity at the bottom plate of the passenger s foot position were obtained,and the damage to the cab structure under the worst-case operating conditions was analyzed.The simulation results show that the shock wave generated by the mine will make the cab floor produce greater acceleration and speed,and the cab structure will be damaged.In this case,the passengers will be injured.It is necessary to add a protective structure for the cab of VMH.The simulation results can provide reference for the design of cab protective-structure of VMH.

关 键 词：驾驶室结构 爆炸冲击波 ALE算法 流固耦合 数值仿真 

分 类 号：TJ818[兵器科学与技术—武器系统与运用工程]