潜深对水下圆柱壳振动声辐射特性的影响  

The effects of immersion depth of submerged cylindrical shell on vibro-acoustic characteristics

作　　者：刘佩[1] 刘书文[1] 黎胜[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室运载工程与力学学部船舶工程学院,辽宁大连116024

出　　处：《舰船科学技术》2014年第5期36-41,48,共7页Ship Science and Technology

基　　金：国家安全重大基础研究资助项目

摘　　要：以水下圆柱壳为例,分析在有限深水域中水面和水底对振动声辐射特性的影响,以及在无限深水域中考虑静水压力下潜深度对振动声辐射特性影响。研究结果表明,在忽略静水压力影响的有限水域中,自由液面使其固有频率加大、振动声辐射曲线整体向高频移动,而刚体边界使其固有频率减小、振动声辐射曲线整体向低频移动,并且模态的顺序可能会发生改变。在考虑静水压力影响的无限深水域中,随着圆柱壳在水中深度的增加,固有频率随之减小、圆柱壳振动声辐射曲线整体向低频移动、声辐射效率会有所降低。With respect to cylinder,the effects of free surface and bottom rigid surface on its vibration and acoustic characteristics in water of finite depth,as well as the impacts of the hydrostatic pressure on its vibrational and acoustic characteristics in water of infinite depth were analyzed in this paper.The research results showed that without taking the effects of hydrostatic pressure in water of finite depth into consideration,the natural frequencies of submerged cylinder increased and the response curves moved toward high frequency.Whereas the natural frequencies of cylinder decreased,the order of modes might change and the response curves moved toward low frequency under the influence of rigid boundary.When taking the effects of hydrostatic pressure in water of infinite depth into account,with the depth of cylinder in the water increasing,the natural frequencies of submerged cylinder decreased,the response curves moved to low frequency and the acoustic radiation efficiency might decrease.

关 键 词：下潜深度 自由液面 刚体边界 静水压力 固有频率 声辐射 

分 类 号：TB532[理学—物理]