计及热传导影响对长杆弹侵彻陶瓷靶的数值分析

采用有限元方法离散瞬态热传导方程，编写成侵彻过程热传导计算模块，并将之嵌入已有的冲击动力学程序中，然后运用于长杆弹在900~1 800 m/s着速范围内侵彻AD95陶瓷靶的数值分析，得到了符合物理事实的计算图像，所得的计算结果比采用传统的绝热模型得到的计算结果更符合实验结果。探讨了计及热传导效应对长杆弹侵彻AD95陶瓷靶数值模拟的影响:着速在900~1 350 m/s范围内时，计及热传导的数值计算所得侵深小于绝热模型计算结果；着速在在1 350~1 450 m/s范围内时，两种模型计算侵深接近；着速在在1 450~1 800 m/s范围内时，热传导模型计算侵深大于绝热模型计算结果。

Influence of heat transfer on long-rod projectiles penetrating into ceramic targets

Based on the finite element method,the heat conduction equation was made discrete and written as the heat transfer computation code which was then embedded into the existing impact dynamics program.The new program was applied to the numerical analysis of the long-rod projectile penetrating into AD95 ceramic targets in the range of 900-1 800 m/s,and the influence of heat transfer on penetration capability was examined.Calculations show that the calculated penetration depth is less than that by the adiabatic model when the heat transfer is taken into account in the range of 900-1 350 m/s.However,it is opposite when the velocity of the projectile comes in the range of 1 450-1 800 m/s.The results by the heat transfer model and the adiabatic model are close to each other in the range of 1 350-1 450 m/s.