基于统计能量分析法的火箭仪器舱声振环境预示  

Prediction for Acoustic-vibration Environment of the Launch Vehicle Instrument Cabin Basd on Statistical Energy Analysis

作　　者：曾耀祥 潘忠文 李东 

机构地区：[1]北京宇航系统工程研究所,北京100076

出　　处：《导弹与航天运载技术》2013年第4期27-32,共6页Missiles and Space Vehicles

摘　　要：以某火箭型号仪器舱为研究对象,建立不同的统计能量分析(Statistical Energy Analysis,SEA)模型,通过与试验数据对比,分析得出统计能量分析法预示精度与子系统的划分和模型参数密切相关,同时利用包络思想给出修正后的铝蒙皮类结构内损耗因子。合理的统计能量模型能够较好地预示仪器舱声振环境,预示结果满足工程分析的要求。Different Statistical Energy Analysis（SEA） models of the instrument cabin were established based on instrument cabin of launch vehicle.Comparing with experiment data,the prediction results show that the prediction precision is related to the partition of subsystem and model parameters.Besides,the improved internal loss factor of aluminum skin structure is presented by envelope method.Acoustic-vibration environment of the instrument cabin could be predicted well with reasonable SEA model and the prediction results meet the requirements of project.

关 键 词：统计能量分析法 内损耗因子 声振环境 

分 类 号：V416.5[航空宇航科学与技术—航空宇航推进理论与工程]