噪声与振动控制 ›› 2013, Vol. 33 ›› Issue (6): 143-147.DOI: 10.3969/j.issn.1006-1335.2013.06.031

• 3.运载工具振动与噪声 • 上一篇    下一篇

螺旋桨激励力下轴系—艇体耦合系统低频声辐射特征分析

陈发祥 1,  谌勇 2,  华宏星 2   

  1. ( 1. 江南长兴造船(集团)有限责任公司,  上海  201913;2. 上海交通大学  机械系统与振动国家重点实验室,  上海  200240 )
  • 收稿日期:2013-07-09 修回日期:2013-08-14 出版日期:2013-12-18 发布日期:2013-12-18

Analysis on the Low-frequency Acoustic Radiation Signature of the Shaft-hull Coupling System Under Propeller Exciting Load

  • Received:2013-07-09 Revised:2013-08-14 Online:2013-12-18 Published:2013-12-18

摘要:

针对某轴系—艇体缩比试验模型,首先进行动力学建模,并利用试验数据对模型参数进行修正。在此基础上将振动模型利用直接边界元法进行进一步延伸分析,对螺旋桨纵、横激励力作用下壳体的声辐射特征进行预测,得到两种激励力下典型模态的壳体表面声压和远场声压分布特性,并从能量角度对耦合系统的声辐射特性进行分析,给出轴系—艇体耦合系统水下声辐射特性。

关键词: 振动与波; 轴系&mdash, 艇体耦合系统; 螺旋桨激励力; 声辐射

Abstract:

Numerical modeling on a scaled shaft-hull model is made using the finite element method firstly. Then the experimental data is used to verify and modify the dynamics model. Direct boundary element method is applied to compute the acoustic radiation signature of the hull when subjected to the propeller exciting force in both transverse and longitudinal direction. The acoustic pressure and far-field pressure distribution is obtained. The energy method is also used to compare the acoustic power under different loading conditions.

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