Simulation techniques of pyroshock environment under the excitation of a light gas gun

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (22) : 1-10.

ZHAO Hongda1,2，SUN Yi1，DING Jifeng3，HAO Zhiwei4，LIU Wei1，WANG Xiong1，LIU Yizhi1

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Abstract

In order to overcome the problem of repeated debugging process in pyroshock tests of mechanical impact, a simulation platform is presented and the effect rules of its adjustable parameters on the pyroshock environment are researched. A simulation platform, which is excited by light gas gun and has multiple parameters, is designed. The shock tests and numerical methods are combined to investigate the effect rules of adjustable parameters, such as the pressure of the gas chamber, the positions of the connectors, the thickness of the loading board, on the Shock Response Spectrum (SRS) of the plate that the device is mounted. At the same time, the quantitative relationship between the pyroshock environment and the adjustable parameters are fitted or the corresponding tables are summarized. The practicability of the platform and the reliability of the effect rules are verified through a typical pyroshock signal. The researches indicate that the relationship between the pressures of the gas chamber has an effect of power-law approximately on the amplitudes of the SRS of the resonant plate, and the combination of the positions of connectors and loading plate thickness can realize the adjustment of knee frequency in large range.

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pyroshock / simulation platform / light gas gun / SRS

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ZHAO Hongda1,2，SUN Yi1，DING Jifeng3，HAO Zhiwei4，LIU Wei1，WANG Xiong1，LIU Yizhi1. Simulation techniques of pyroshock environment under the excitation of a light gas gun[J]. Journal of Vibration and Shock, 2021, 40(22): 1-10

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