摘要
根据统计能量分析(SEA)法,对某卫星声振环境和某返回舱噪声环境进行了计算分析。提出了仅通过一次试验获取SEA参数的综合确定方法,根据这种方法对SEA模型参数进行修正,利用修正过的参数计算的卫星结构响应结果与试验结果更加接近。另外,还针对SEA模型参数的灵敏度问题进行了分析。在返回舱的应用中,将SEA法预示结果与曲线拟合方法预示结果及试验结果相比较,结果说明三者一致。
The vibro-acoustic environment analysis of a certain satellite and environment noise calculation for a kind of reenter cabin are given based on SEA theory. In the satellite application, comprehensive method is provided, by which SEA parameters can be got by only one test. With this method, the SEA parameters of model are amended. Using the modified SEA parameters, responses of the satellite structure are consistent with the test results well. Sensitivity of the SEA model is also analysed. In the reenter-cabin application, the predicted environment results of SEA are compared with results of curve fitting method and test. It shows from the comparison chart that the predicted results is consistent with the results using curve fitting method and acoustic test.
出处
《振动工程学报》
EI
CSCD
北大核心
2004年第4期477-482,共6页
Journal of Vibration Engineering
关键词
统计能量分析
卫星
模型参数
综合方法
Mathematical models
Satellites
Sensitivity analysis
Statistical methods
Structural analysis
