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针对航天器混响声场中的声振预示问题,提出了一种满足声场载荷空间相关性的混响载荷建模方法,该方法能够简化声振分析的建模过程,提高分析效率。首先基于波动理论给出了混响载荷空间相关性的理论模型;随后结合工程需求,提出了基于Rayleigh积分和互易关系的混响载荷建模方法,并从理论上证明其满足混响载荷的空间相关性理论模型;最后采用典型算例对建模方法的正确性进行了验证,并研究了声场载荷空间相关性对声振预示结果的影响。
Aiming at the problem of acoustic vibration prediction in spacecraft reverberant sound field, a reverberation load modeling method is proposed to meet the spatial correlation of sound field load. This method can simplify the modeling process of acoustic vibration analysis and improve the analysis efficiency. Firstly, based on the wave theory, the theoretical model of the reverberation load space correlation is given. Then based on the engineering requirements, a reverberation load modeling method based on Rayleigh integral and reciprocal relationship is proposed. It is theoretically proved that the reverberation load satisfies the reverberation load Finally, a typical example is used to verify the correctness of the modeling method. The effect of the spatial correlation of the sound field load on the prediction of the acoustic vibration is also studied.