弹体侵彻过程中装药温升的近似分析

对侵彻过程中内部装药轴向应力和变形进行理论分析,并考虑装药的弹塑性变形,得到轴向应力 和形变量沿着装药轴向分布函数,以内壁与装药摩擦生热和热传导为基础,得到装药温度的分布曲线、最高温 度在装药中的相对位置。计算结果表明,装药最高温升以及最高温升在装药中的位置与炸药的物性参数、装 药长度和过载最大值相关,临界装药长度可作为弹体装药设计的参考,计算结果为弹体侵彻过程中的装药设 计和安全性分析提供理论依据。

Approximate analysis on temperature rise in charge explosive during projectile penetration

The axial stress and the axial deformation of the charge explosive in a projectile was theoretically analyzed during the penetration process.The corresponding distribution functions along the axis of the charge explosive were attained by considering the elastic and plastic deformation of the charge explosive.Based on the friction-induced heat as well as the heat conduction,the temperature distribution along the axis of the charge explosive was obtained.Calculated results show that the maximum temperature rise and its location in the charge explosive are dependent on the charge length and the overload peak in addition to the physical property parameters of the explosive.The calculated critical charge length can be taken as a reference for the charge design.This investigation can provide a theoretical basis for the charge design and the safety analysis in the engineering practice of the projectile penetration.