壳体受激响应的频率/波数谱分析法

FREQUENCY／WAVE NUMBER SPECTRUM METHOD OF THE EXCITATION RESPONSE OF A SHELL STRUCTURE

本文利用快速傅里叶变换和最大熵谱分析计算频率／波数谱，对某水下航行器中段壳体的受激响应特性进行了频率／波数谱分析，得到了振动波在该壳体中传播的波数、波速、波型和波的传播方向，与理论分析相比，结果吻合较好。

In this paper， frequency／wave number spectra are given using fast Fourier transform and maximum entropy spectral analysis． The excitation responses of the middle parts of the shell ofa underwater vehicle are analysed with frequency／wave number spectrum method． Wave numbers， wave velocity， types and directions ofwaves propagating on the shell are obtained． The experimental results are in good agreement with theoretical predlctions．