冲击谱试验装置仿真研究

Simulation Study of a Shock Response Spectrum Test facility

该文从跌落式谐振板模拟装置设计原理出发 ,采用工程结构动态特性分析中常用的有限元方法对该装置的关键件谐振板的固有频率进行了设计计算 ,同时对整个系统在冲头的真实冲击力作用下的动态响应使用振型迭加法进行了计算机仿真研究。研究结果表明 :适当调整冲击力的大小、谐振板的固有频率以及板上、板下各类阻尼材料的阻尼特性 ,跌落式谐振板模拟装置可以较好地实现对航天器爆炸冲击环境的模拟。该文对现有同类装置的调试以及对利用同一设计原理进行的新装置的研制会有一定的指导作用。

A kind of shock response spectrum test facilities, called resonant plate drop machine, is investigated. The natural frequencies of the resonant plate being a key part of the facility are calculated by using finite element method. The dynamic response of the whole system is simulated when the machine is excited by a real shock generated by a dropping hammer. The research results indicate that the resonant plate drop machine can simulate pyrotechnic shock by adjusting the force, the natural frequencies of the plate and the damping materials above and bottom of the plate. This research work can help developing a same kind of machines and improving theirs performance.