统计能量分析方法用于卫星天线结构声振响应预示的有效性研究

鉴于有限元法（finite element method, FEM）在求解中高频段天线结构振动噪声问题中的局限性，引入统计能量分析（statistical energy analysis, SEA）方法进行天线结构全频段的噪声分析：以卫星天线反射面为研究对象建立统计能量模型；将声振响应分析结果与卫星天线噪声试验结果进行对比，发现当内损耗因子≤1.0%时，二者吻合良好，0.5%是最佳内损耗因子。以上验证了统计能量分析方法可有效应用于卫星天线结构预示，并可作为卫星型号研制过程中天线结构动力学分析的有益补充。

The prediction of vibro-acoustic response of satellite antenna based on statistical energy analysis

The vibro-acoustic analysis of large and flexible structures is challenging and time-consuming under the frame of the conventional finite element method (FEM). To solve this problem, this paper proposes a method based on the statistical energy analysis(SEA) for the mid- and high-frequency vibro-acoustic analysis. The dependency of the internal loss factor on the model is determined in the case of a satellite antenna reflector. It is shown that the analytical result agrees quite satisfactorily with the test data when the internal loss factor ranges from 0.1% to 1.0%, and an assignment of 0.5% is advisable. This study may provide a helpful reference for the dynamic analysis of satellite antenna structures in the development process.