摘要
暴露平台作为搭载火工分离装置和载荷适配器等精密仪器的构件是航天飞行器中重要组成部分,暴露平台在火工冲击环境下会产生高频、瞬态和高量级特点的火工冲击响应。高量级的火工冲击易对星载设备中的敏感元器件造成损伤从而产生难以估量的损失,故有效地控制星箭暴露平台在火工环境下的高频冲击对航空航天领域具有巨大的意义。该研究运用蜂窝芯子式的柔性包袋阻尼技术对暴露平台进行降冲击研究,通过对柔性包袋阻尼系统模型进行离散元耗能仿真设计,分析粒子材质、粒径、填充率及包袋膜厚度对柔性包袋阻尼器降冲击性能的影响,获取柔性包袋阻尼器的最优特征参数。通过冲击试验得出安装不同参数柔性包袋阻尼器暴露平台的冲击响应谱并与仿真结果进行对比,验证了模型的正确性和柔性包袋阻尼技术的有效性。仿真和试验结果表明,柔性包袋阻尼器降冲击性能最佳的粒子材质为铁基合金,最优粒径为2.0 mm,最优填充率为95%,最优膜厚为0.2 mm。最优参数的柔性包袋阻尼器降冲击效果达到了58.13%,达到了梦天载荷仓暴露平台的降冲击要求。
An 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 was analyzed,and the optimal characteristic parameters of the flexible bag damper were 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.
作者
肖望强
黄自杰
刘汉武
钱海鲲
XIAO Wangqiang;HUANG Zijie;LIU Hanwu;QIAN Haikun(School of Aeronautics Engineering,Xiamen University,Xiamen 361000,China;Shanghai Aerospace System Engineering Research Institute,Shanghai 200000,China)
出处
《振动与冲击》
EI
CSCD
北大核心
2024年第4期96-104,共9页
Journal of Vibration and Shock
基金
国家自然科学基金项目(51875490)
福建省科技计划项目(2022H6003)
慧眼行动项目(9350DC58)
中央高校基本科研业务费专项资金项目(20720210042)。
关键词
暴露平台
柔性包袋阻尼器
离散元
exposure platform
bean bag damper
discrete element