平面爆轰波驱动金属飞片运动的数值模拟研究

Numerical Study on the Acceleration of Metallic Flyers Driven by Planar Detonation Wave of Explosives

在材料动力学特性的实验研究中,采用平面爆轰波驱动金属飞片对靶体实施加载是一种重要的实验手段。飞片在爆轰载荷作用下的平整度以及最终的宏观极限速度决定对靶体的加载效果,前者决定靶体尺寸,而后者决定对靶体的压力。采用ALE与Lagrange耦合方法,模拟了爆轰载荷驱动飞片的动力过程,给出了飞片达到极限速度时刻的平整度,并将数值模拟得到的极限速度与基于解析法计算的极限速度进行了对比分析。结果表明,采用流固耦合方法分析爆轰载荷作用下飞片的运动过程是有效并实用的。

As regards the experimental study on the dynamic properties of materials,planar detonation wave driving flyers to impact target is an important technique.The smoothness and limit speed of flyers under detonation load determine the loading effects.The former determines the target size,and the later determines the pressure to the target.Consequently,based on the coupling ALE and Lagrange method,the simulation for the process of detonation wave driving the flyer is performed,and the smoothness of the flyer is given when it approaches the limit speed.The limit speeds of the flyer from numerical results and analytical solution are comparatively analyzed.Finally,we summariz the numerical results and point out the practicality and effectiveness of the fluid-structure coupling method in studying the motive process of flyers under detonation load.