船用螺旋桨叶片振动辐射噪声数值分析

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (12) : 207-210.

论文

船用螺旋桨叶片振动辐射噪声数值分析

吴思远黎胜

作者信息 +

Numerical Analysis of Noise Induced by Vibration of Propeller Blades

WU Si-yuan , LI Sheng

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文章历史 +

摘要

螺旋桨噪声是舰船水下噪声的重要组成部分，它会影响舰船的隐身性能。螺旋桨水下噪声可分为流体动力噪声和叶片振动辐射噪声。本文计算研究了螺旋桨叶片振动辐射噪声，首先采用CFD方法对螺旋桨敞水特征进行模拟，提取螺旋桨表面的压力波动作为外部载荷；再利用有限元方法对螺旋桨进行振动响应分析；最后以振动响应作为声辐射边界条件，利用边界元方法计算了螺旋桨的振动辐射噪声。

Abstract

The noise of a propeller is of great importance in ship underwater noise, which will affect the stealth performance of ships. The noise of a propeller can be divided into two kinds due to their different causes. One is fluid-dynamic noise, and the other is the noise induced by the vibration of propeller blades. To calculate the noise induced by the vibration of propeller blades, first the numerical simulation of propeller open-water performance is calculated by means of CFD, then the harmonic response analysis of the propeller is accomplished by FEA method with the hydrodynamic load as the excitation, after then the outputs of the response from FEA are used as the boundary condition for BEA to obtain the acoustic radiation from the propeller blades.