基于STAR-CCM + 與Virtual.Lab 的圍殼流激振動(dòng)噪聲仿真分析

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中圖分類(lèi)號(hào)：E925.66 文獻(xiàn)標(biāo)志碼：B

Abstract：To solve the flow-induced vibration noise problem of the streamlined structures of the underwater vehicle's sail，computational fluid dynamics（CFD） and computational acoustics numerical method are employed，the distribution of flow field and the characteristic of flow-induced vibration noise are comprehensively analyzed. The hydrodynamic pressure fluctuation on the structure surface is used as the excitation to solve the acoustic vibration coupling of the structure with a acoustic coating. By comparing the flow-induced vibration noise before and after applying the acoustic coating on the underwater vehicle's sail，the influence of the acoustic coating material parameters on vibration noise is explored. It can provides a reference for vibration reduction in underwater vehicle.

Key words：acoustic coating；large eddy simulation （LES）； flow-induced vibration noise；acoustic vibration coupling；computational fluid dynamics （CFD）

0 引言

出的翼型結(jié)構(gòu)，如舵、圍殼、穩(wěn)定翼等，這些翼型結(jié)構(gòu)破壞了航行器本身的流場(chǎng)，導(dǎo)致結(jié)構(gòu)發(fā)生振動(dòng)，從而傳遞到水下航行器整體并向外輻射，產(chǎn)生流激振動(dòng)水下航行器多為流線(xiàn)型結(jié)構(gòu)，其表面有許多突噪聲。（剩余7984字）