一种冲击谱试验机的研制

Development of a Shock Response Spectrum Test Facility

目的研制冲击谱试验机 ,以考核航天产品耐受爆炸冲击环境的能力。方法采用有限元方法对跌落式冲击谱试验机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冲击力作用下的动态响应进行了计算机仿真研究 ,进而在仿真结果的指导下研制了冲击谱试验机。结果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 ,跌落式冲击谱试验机可以较好地实现对航天器爆炸冲击环境的模拟。结论实际测试曲线与计算机仿真结果的较好吻合 ,验证了仿真结果的有效性 ,从理论与实践上证明了用跌落式冲击谱试验机模拟航天器爆炸冲击环境的可行性。

Objective To develop a shock response spectrum test facility for testing space products in the pyrotechnic environments. Method The natural frequencies of the resonant plate,a key part of the facility,were calculated with finite element method. The dynamic response of the whole system was simulated when the machine was excited by a real shock generated by a dropping hammer. A shock response spectrum test facility was developed under the guide of the simulation results. Result The resonant plate drop machine could simulate pyrotechnic shock by adjusting the force, the natural frequencies of the plate and the damping materials above and under the plate. Conclusion The agreement between the measurement and the simulation indicates that the computer simulation results are reliable. It is feasible to use the resonant plate drop machine to simulate pyrotechnic environment.