传统arbitrary lagrange—Eulerian (ALE)算法模型大、耗时长.为了解决这些问题,提出了一种改进算法.利用仿真软件LS-DYNA,采用ALE算法和试验数据相对比,验证缩放前模型的仿真准确性;然后根据缩放理论,等比例缩小整车模型和炸药当量,同样用ALE算法对车身底部在爆炸冲击波作用下的动态响应进行仿真,得到驾驶室底板的位移和速度曲线.最后将仿真结果与原模型仿真值和理论计算值进行对比.结果表明:运用相似理论对驾驶室进行仿真所得结果与理论结果吻合较好,可应用于爆炸冲击波对车身底板的防护仿真研究中.%Traditional arbitrary lagrange-Eulerian (ALE) method need big finite element model and it costs long time.In order to solve this problems,an improved algorithm is put forward..Using LS-DYNA software,ALE algorithm and the experimental data,simulation accuracy of the model before scaling was verified.Then according to the theory of scale,scale the vehicle model and the equivalent of explosive,equally with the ALE algorithm to make simulation for the dynamic response of the bottom of car body under the action of the explosion shock wave.Then the cab floor displacement and velocity curve are received.Finally the simulation results with the simulation values and the theoretical value the original model was compared.The results show that the result proceeds by the theory of similarity in good agreement with the theoretical results,this method can be applied to simulation of blast damage to the vehicle bottom.
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