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卫星在主动段承受发动机脉动推力和气动噪声激励复合作用下的振动环境。以整星模型为试验对象,分别开展了卫星的振动台随机振动试验、噪声试验和声-振联合试验。对3组试验结果的对比分析发现,声-振联合试验中,基础激励和噪声激励对不同结构处响应在低频段和中高频段具有不同的影响规律。在此基础上,提出了一种工程应用方法,即用振动台试验和噪声试验的响应极值包络法以及线性叠加法以预示声-振联合试验的响应。
Satellites in the active section of the engine to withstand pulsating thrust and aerodynamic noise excitation combined vibration environment. Taking the whole-star model as the test object, random vibration test, noise test and acoustic-vibration joint test of the satellite were carried out respectively. The comparative analysis of the three groups of test results shows that the basic excitation and the noise excitation have different influences on the response of different structures in the low frequency band and middle and high frequency band in the acoustic-vibration joint test. Based on this, an engineering application method is proposed, which is to predict the response of the acoustic-vibration joint test by using the envelope method of response extreme value of vibration table test and noise test and the linear superposition method.