文章基本信息

标题：A Simple Approximate Method for Predicting Impact Force History and Application to Pyroshock Simulation
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作者：Mun-Guk Kim ; In-Gul Kim ; Eun-Su Go 等
期刊名称：Lecture Notes in Engineering and Computer Science
印刷版ISSN：2078-0958
电子版ISSN：2078-0966
出版年度：2018
卷号：2235&2236
页码：576-580
出版社：Newswood and International Association of Engineers
摘要：The impact caused by the explosion of the pyrotechnic device used for stage separation of a launch vehicle and for satellite separation is called pyroshock. Pyroshock causes high-frequency, high-amplitude shock energy, which causes damage to electronic equipment situated close to the pyrotechnic device. Therefore, the electronic equipment mounted on a satellite has to satisfy the requirements of the Shock Response Spectrum(SRS) for pyroshock. As pyrotechnic device is costly and hazardous, mechanical pyroshock simulation devices can be used in pyroshock testing. Metal-metal impact methods are utilized to simulate mechanical pyroshock, and to adjust the knee frequency of the shock response spectrum through resonant plates. However, it is difficult to predict the impact force history of metal-metal impacts and the dynamic behavior of resonant plates. Therefore, devices that satisfy the shock response spectrum are designed through experimental trial and error and much cost and effort is required. Accordingly, to reduce the cost and effort required in the initial design of a pyroshock simulation device, the shock response spectrum should be easily predictable. In this paper, pyroshock was simulated through a pendulum impact device. In order to predict the shock response spectrum without difficulty, impact force history according to the mass and velocity of an impactor was represented by specific variables. An interpolation method and an extrapolation method based on experiment data were used to predict impact force history according to impact mass and velocity. Having determined the predicted impact force history, the dynamic behavior of a resonant plate and the shock response spectrum were calculated by performing finite element analysis (FEA). The predicted shock response spectrum findings were compared with experiment results.
关键词：Impact force history; Pyroshock simulation