基于ANSYS/LS-DYNA高速弹头冲击仿真

Simulation of High-speed Warhead Impact Based on ANSYS/LS-DYNA

摘要:

高速弹头的侵彻问题是军工防护等领域研究的一个重要课题；采用有限元仿真软件ANSYS/LS-DYNA为平台对高速弹头侵彻靶板的过程进行了数值模拟；选取Johnson-Cook本构模型来描述侵彻过程,得到了速度为1 300 m/s的子弹侵彻6 mm靶板的速度、加速度、能量变化曲线和VonMises应力云图,从而直观地显示靶板的变形情况和动态响应,有助于分析高速弹头的撞击过程；验证了ANSYS/LS-DYNA有限元仿真在分析侵彻问题中的可行性和优越性,对改进弹头和防护材料设计具有重要意义；并为防护材料设计进行高速冲击实验的研究提供了新的途径和思路。

Abstract:

The penetration of high-speed warheads is an important issue in the field of military protection. The finite element simulation software ANSYS / LS-DYNA is used to simulate the process of high speed warhead penetrating the target plate. The Johnson-Cook constitutive model is used to describe the penetration process. The velocity, acceleration, energy change curve and VonMises stress cloud of the 6 mm target penetrating with a speed of 1 300 m/s are obtained. In this case The deformation and dynamic response of the target are visually displayed.It helps to analyze the high-speed warhead impact process. It is proved that the feasibility and superiority of ANSYS/LS-DYNA finite element simulation in analyzing the penetration problem are of great significance to improve the design of warhead and protective material. And it provides a new way and idea for the research of high-speed impact experiment of protective material design.