用TDDNA程序计算导弹战斗部瞬态冲击响应

The Calculation of Impact Response Problem for a Missile Warhead by TDDNA

在已往的结构动力响应分析当中。人们往往采用的是等时间步的线性计算,而对于一些进入塑性状态结构来说,其线性计算的结构的应力和变形已不是结构的起初的应力和变形,其结果只给出了一种定性的分析,而且其计算结果高于非线性的计算结果,对于结构设计来说是偏于危险的.因此本文运用了 TDDNA 程序,采用分区段变时间步的显示中心差分方法,对某导弹战斗部进行了非线性的动力响应计算.并绘出了其穿甲时的应力曲线.计算结果表明,在线性计算时,其结构的应力峰值已远远超出结构材料的应力屈服极限,结构已进入了屈服状态.用本文采用的积分方法,不仅节省大量的计算对间,而且计算结果是可估的,它对导弹战斗部的结构分析设计具有很好的参考价值.

This paper deals with the application of TDDNA,a structural analysis program for three-di mension dynamic response of nonlinear systems.The three-dimension nonlinear dynamic analysis is carried out for a warhead model of missile.The multi-timestep explicit time integration(explic it-explicit partition)is adopted to explore and calculate the transient response of warhead during armor piercing armor piercing in dynamic analysis.The nonlinear result is very useful to design the structure of a warhead model of missile.