基于传递特性的航天器在轨冲击环境预示方法研究  

Prediction of spacecraft in-orbit shock environment based on transfer functions

作　　者：李会娜[1] 高庆[2] 卢鑫[2] 秦朝红[1] LI Huina;GAO Qing;LU Xin;QIN Zhaohong(Beijing Institute of Structure and Environment Engineering;China Academy of Launch Vehicle Technology,Beijing 100076,China)

机构地区：[1]北京强度环境研究所 [2]中国运载火箭技术研究院,北京100076

出　　处：《航天器环境工程》2019年第4期340-343,共4页Spacecraft Environment Engineering

基　　金：国家自然科学基金项目“超声速进气道激波振荡与结构耦合动态特性研究”(编号:11502023)

摘　　要：实际飞行实验中,经常需要较为精确地确定高频激励作用下航天器某结构部位的冲击响应,统计类预示方法速度快但误差较大;数值类预示方法较为精确,但计算规模大、耗时长,且很难考虑冲击源和结构传递等偏差的影响.文章参考振动传递函数的定义和性质,建立了基于结构传递特性、用已知结构点的冲击环境预示相关结构冲击环境及其分布的方法;利用某火工分离试验冲击测量结果,验证了该方法可快速、准确预示指定部位的冲击环境.In the flight experiment,it is often necessary to determine the impact response of a part of the spacecraft structure under high frequency excitations.In such case,the statistical predication methods give results faster but with more error;whereas the numerical methods enjoy a more accurate result at the expense of time,and it is usually difficult to consider the deviations of the shock source and the structural transferring.Therefore,both methods have some undesirable features.This paper proposes a prediction method based on the shock transfer function,similar to the vibration transfer function.It is verified by a separation test of a pyro product.It is shown that the method can quickly and accurately predict the impact response of the specified spot.

关 键 词：航天器 高频冲击 冲击响应 传递特性 冲击环境预示 

分 类 号：TB122[理学—工程力学] V416.5[理学—力学]