Astudy on impact reduction of a honeycomb core exposed platform based on a flexible bag damper

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (4) : 96-104.

XIAO Wangqiang1，HUANG Zijie1，LIU Hanwu2，QIAN Haikun2

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Abstract

The exposed platform, as a component equipped with precision instruments such as pyrotechnic separation devices and load adapters, is an important component of aerospace vehicles. Under pyrotechnic impact environments, the exposed platform will generate high-frequency, transient, and high-order pyrotechnic impact responses. High level pyrotechnic impacts can easily cause damage to sensitive components in onboard equipment, resulting in incalculable losses. Therefore, effectively controlling the high-frequency impact of the satellite rocket exposure platform in pyrotechnic environments is of great significance in the aerospace field. This article uses the honeycomb core type flexible bag damping technology to conduct impact reduction research on the exposed platform. Through discrete element energy dissipation simulation design of the flexible bag damping system model, the influence of particle material, particle size, filling rate, and bag film thickness on the impact reduction performance of the flexible bag damper is analyzed, and the optimal characteristic parameters of the flexible bag damper are obtained. The impact response spectra of the exposed platform with flexible bag dampers with different parameters were obtained through impact experiments and compared with simulation results, verifying the correctness of the model and the effectiveness of flexible bag damping technology. The simulation and experimental results show that the flexible bag damper with a filling rate of 95% and a film thickness of 0.2mm and a material of iron based alloy with 2mm particles has the best impact reduction performance. The optimal parameter of the flexible bag damper has an impact reduction effect of 58.13%, meeting the impact reduction requirements of the Mengtian Load Warehouse Exposure Platform.

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Exposure platform / Bean bag damper / Discrete element

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XIAO Wangqiang1，HUANG Zijie1，LIU Hanwu2，QIAN Haikun2. Astudy on impact reduction of a honeycomb core exposed platform based on a flexible bag damper[J]. Journal of Vibration and Shock, 2024, 43(4): 96-104

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