摘要
针对弹载器件在火炮发射环境下较同样峰值冲击实验环境下更易损坏的现象,以某型特种弹所用弹载光电器件及其减载组件为例,分析了应力波的传播特点和规律;根据特征线相容关系,运用差分方法,通过对黏弹性材料在高过载环境下的动力学方程进行离散化处理,研究了弹载器件的过载时间累积效应形成机理和应力计算方法,对比分析了过载峰值、持续时间不同情况下作用于弹载器件的应力,为不同弹载器件的抗高过载设计提供理论分析和方法参考。
Aiming at projectile-based components in artillery launch environment are easier to be damaged than they be in test environment with the same peak impact,one type projectile-based component with deloading subassembly was used to analyze stress wave propagating characteristics and laws. According to the compatibility relation among characteristic curves,the difference method was applied to discrete dynamic equations of viscoelastic materials in higher overload environment. The mechanism to form overload time cumulative effect of the projectile-based component and its stress calculation method were studied. Its stresses were analyzed contrastively under different overload peak values and time durations. The results provided a reference for anti-high overload design of projectile-based components.
出处
《振动与冲击》
EI
CSCD
北大核心
2017年第24期237-241,共5页
Journal of Vibration and Shock
基金
国家自然科学基金(11172331)
关键词
弹载器件
应力波
减载组件
过载累积
projectile-based components
stress wave
deloading subassembly
cumulative overload
