典型船舶结构中振动波传递特性研究

姚熊亮;计方;钱德进;庞福振

振动与冲击 ›› 2009, Vol. 28 ›› Issue (8) : 20-24.

PDF(1558 KB)
PDF(1558 KB)
振动与冲击 ›› 2009, Vol. 28 ›› Issue (8) : 20-24.
论文

典型船舶结构中振动波传递特性研究

  • 姚熊亮,计方,钱德进,庞福振
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The characteristics of vibration wave propagation from typical hull structure

  • YAO Xiong-liang,Ji Fang,QIAN De-jin,PANG Fu-zhen
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摘要

摘要:以波动理论为基础,根据不均质结构中波型转换、阻抗特性,系统地分析了典型船舶结构中振动波的传递特性,推导并给出了平面弯曲波入射时的隔声量公式。在此基础上人为构造了阻抗失配基座,分析了阻抗失配基座的隔振性能。结果表明,十型结构对弯曲波有较强的阻抑作用,弯曲波在突变截面处的能量再分配关系主要由两块板的特性阻抗所决定;┻┳型构件的连接处机械阻力较大,其隔振效果超过十型结构; 型结构隔振性能随突变截面阻抗失配程度增大显著提高,采取多次截面突变的办法能够得到较大的隔声量;阻抗失配基座加剧了振动波在船体板架中的波型转换、散射和反射,使总的隔振效果显著提高。本文旨在为船舶结构声学设计提供参考。

Abstract

Abstract:Based on wave analysis method, the characteristics of vibration wave propagation from typical hull structure are analyzed according to wave conversion and impedance characteristic in non-homogeneous structure, and the formula of sound transmission loss incident by plane bending wave is deduced. On this basis, the influence of impedance mismatch ship foundation on isolation performance is discussed. The results show that 十structure greatly impedes the bending wave propagation, and the redistribution of bending wave in mutated-section is mainly determined by natural impedance of the two plates. The resistance at the connection of ┻┳ structure increased and its isolation performance is better than十structure. The isolation performance of structure obviously increased with the increment of the impedance mismatch level of the mutated-section, therefore more sound transmission loss can be get by bringing in a number of mutation of cross-section. The impedance mismatch base aggravated wave conversion, scattering and reflection of vibration wave in the hull plates, so that the total isolation performance improved significantly. This article aims to provide reference for acoustic design of typical hull structure.

关键词

波动分析法 / 平面弯曲波 / 阻抗失配 / 隔声量

Key words

wave analysis method / plane bending wave / impedance mismatch / sound transmission loss

引用本文

导出引用
姚熊亮;计方;钱德进;庞福振. 典型船舶结构中振动波传递特性研究[J]. 振动与冲击, 2009, 28(8): 20-24
YAO Xiong-liang;Ji Fang;QIAN De-jin;PANG Fu-zhen. The characteristics of vibration wave propagation from typical hull structure[J]. Journal of Vibration and Shock, 2009, 28(8): 20-24

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