论文部分内容阅读
文章针对航天器在混响声场中的随机振动问题,提出一种通过多个不相干的平面波线性叠加以模拟混响声场的实现方法,给出了每个平面波的具体参数并从理论上证明其满足理想混响声场假设。在此基础上利用有限元-边界元耦合方法对整星低频声固耦合问题进行分析,并用混响室噪声试验响应数据进行了验证。研究结果表明:该方法理论推导正确,为航天器低频声固耦合分析及声振力学环境预示提供了一种新的有效手段。
Aiming at the random vibration problem of the spacecraft in the reverberation sound field, a method to simulate the reverberant sound field by linearly stacking a plurality of incoherent plane waves is proposed. The specific parameters of each plane wave are given and it is theoretically proved that Satisfy the ideal reverberant sound field assumptions. On the basis of this, the finite element-boundary element coupling method is used to analyze the sound-solid coupling problem of the low frequency of the whole satellite, and the noise response of the reverberation chamber is verified. The results show that the theory of the method is derived correctly and provides a new effective method for the sound-mechanical coupling analysis of low-frequency spacecraft and predicting the acoustic vibration mechanical environment.