基于SPH算法的驾驶室底部结构对爆炸冲击波响应数值仿真  

Numerical Simulation of the Response of Vehicle Cab Bottom Shell Structure under Explosive Blast Wave Based on Smoothed Particle Hydrodynamics

作　　者：石秉良[1,2] 周孔亢[1] 张云 祁涛 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]陆军汽车试验场,南京210028

出　　处：《机械工程学报》2016年第16期132-139,共8页Journal of Mechanical Engineering

摘　　要：针对地雷等简易爆炸装置在车辆驾驶室底部非接触爆炸问题,引入无网格光滑粒子流体动力学(Smoothed particle hydrodynamics,SPH)算法模拟爆炸冲击波作用下车辆底部结构的响应。以四边约束靶板为研究对象,分析靶板在爆炸冲击下的能量、应力变化和破坏形态,通过与传统的任意拉格朗日欧拉(Arbitrary Lagrangian-Eulerian,ALE)固流耦合分析法和经验公式计算结果对比,验证SPH算法应用于处理此类问题的可行性;利用SPH算法对爆炸冲击波作用下驾驶室底部结构进行数值仿真,分析车辆底部的油箱、电瓶支架、驾驶室地板、车架等关键结构的冲击响应,并与试验做出对比验证。仿真结果表明,基于SPH算法的爆炸仿真分析具有精度较高、建模简单、耗费计算资源少等优势,能够应用于爆炸冲击波作用下驾驶室底部板壳结构的响应研究,并为驾驶室底部结构抗爆炸设计提供参考。In order to explore the response of vehicle cab bottom under the non-contact blast wave of improvised explosive device, mine, etc. smoothed particle hydrodynamics（SPH） algorithm is employed. The energy, stress contours and destruction form of a square plate restricted by four sides under blast wave with SPH algorithm are analyzed, and the results is highly comparable with empirical formula and the classical method arbitrary Lagrangian-Eulerian（ALE）, the SPH algorithm is available for the transient dynamic response analysis of structure under blast wave. The SPH algorithm is employed to analyze the response of vehicle bottom under explosive blast wave, and the response of fuel tank, battery support, cabin floor and chassis, etc. are validated with physical test. A conclusion can be made that SPH needs simpler model and lower cost, and the result is more accurate. So SPH can be used to predict the vehicle cab bottom shell structure’s response under the blast wave, and provide a reference to the anti-explosion design of vehicle bottom structure.

关 键 词：车辆 驾驶室底部结构 光滑粒子流体动力学 爆炸冲击波 结构响应 

分 类 号：U463[机械工程—车辆工程]