应用结构应变测量的航天器随机振动载荷频率收敛特性研究  

Research for Frequency Astringency of Spacecraft Random Vibration Load Based on Structure Strain Measurement

作　　者：邓卫华[1] 杨新峰[1] 秦江[1] 李艳辉[1] 张玉梅[1] 张红亮[1] 扈勇强 DENG Weihua , YANG Xinfeng , QIN Jiang , LI Yanhui , ZHANG Yumei, ZHANG Hongliang , HU Yongqiang(DFH Satellite Co., Ltd.？ Beijing 100094, Chin)

机构地区：[1]航天东方红卫星有限公司,北京100094

出　　处：《航天器工程》2018年第3期140-145,共6页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：为了简化航天器随机振动载荷的识别,文章对其频率收敛特性进行了研究。方法是测量随机振动时航天器主结构应变功率谱密度值(PSD),计算不同频段的应变均方根值(RMS),然后分析得到适当的截止频率。通过该方法,获得了从低于100kg到1000kg以上多个级别航天器的应变收敛特性。文章最后就某一航天器随机振动载荷识别时如何选择合适的截止频率提出了建议。To simplify identification of spacecraft random vibration load？ this paper researches the frequency astringency. The method is to measure spacecraft main structure strain PSD when ran-dom vibration test, and to compute strain RMS in different frequency ranges and then analyze the proper cut-off frequency. By this method, some frequency astringency is found with different spacecrafts from less than 100 kg to more than 1000 kg. Finally a suggestion is provided to select a proper cut-off frequency for estimating random vibration load corresponding to a certain space-craft.

关 键 词：航天器 随机振动载荷 频率收敛特性 应变 

分 类 号：V414[航空宇航科学与技术—航空宇航推进理论与工程]