水下圆柱壳声辐射激发水表面声波研究  

Study of Water Surface Acoustic Waves Excited by Acoustic Radiation from Underwater Cylindrical Shells

作　　者：张圣海 徐剑秋 黎胜[1,2] ZHANG Shenghai;XU Jianqiu;LI Sheng(State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,Dalian 116024,Liaoning,China;School of Naval Architecture,Dalian University of Technology,Dalian 116024,Liaoning,China;Science and Technology on Underwater Test and Control Laboratory,Dalian 116013,Liaoning,China)

机构地区：[1]大连理工大学工业装备结构分析优化与CAE软件全国重点实验室,辽宁大连116024 [2]大连理工大学船舶工程学院,辽宁大连116024 [3]水下测控技术重点实验室,辽宁大连116013

出　　处：《兵工学报》2024年第7期2329-2340,共12页Acta Armamentarii

摘　　要：研究水下声源声辐射激发的水表面声波,对在空气中进行跨介质水下声源探测具有重要意义。为研究水下声源声辐射激发的水表面声波特性,基于水下声传播理论推导水下稳态点源球面声波激励水表面声波的理论解,依据有限元方法,以脉动球点源为例进行数值分析验证,设计相应实验验证水平衰减规律及声源深度影响。基于声-结构耦合有限元方法研究声源深度等声源参数及环境参数对水下圆柱壳声辐射激发水表面声波的影响。研究结果表明:所提激励下的圆柱壳声源在半自由场环境中激发的海水表面波振幅在某些振型对应固有频率下的振幅远大于其他频率;海底和粗糙海面对水表面波振幅有影响;在所提载荷激励下,有限水深中水下圆柱壳声辐射激励的水表面波振幅在3倍圆柱壳半径以内及20倍半径之外潜深范围内与潜深呈正比,其他范围随潜深呈反比。The study of water surface acoustic waves excited by the acoustic radiation from underwater acoustic source is of great significance for cross-media underwater sound source detection in the air.In order to study the characteristics of water surface acoustic waves excited by the acoustic radiation from underwater acoustic source,the theoretical solution of water surface acoustic wave excited by the spherical acoustic wave radiation from underwater steady point source is derived based on underwater sound propagation theory,the pulsating spherical point source is used as an numerical analysis example to verify the model according to the finite element method,and the corresponding measurement experiments are designed and conducted to verify the horizontal attenuation law and the influence of sound source depth.Based on the acoustic-structure coupling finite element method,the influences of sound source parameters,such as sound source depth,and environmental parameters on the water surface acoustic wave induced by the acoustic radiation from underwater cylindrical shell are studied.The research results indicate that the amplitude of seawater surface wave excited by the cylindrical shell sound source in a semi-free field environment is much greater than that of other frequencies under certain vibration modes corresponding to the natural frequencies.The seabed and rough sea surface have an impact on the amplitude of water surface waves.Under the excitation of load,the amplitude of water surface waves excited by the sound radiation from underwater cylindrical shell in finite water depth is positively proportional to the depth of submergence within 3 times the radius of the cylindrical shell and beyond 20 times the radius,while other ranges are inversely proportional to the depth of submergence.

关 键 词：水下圆柱壳 声辐射 水表面声波 声-结构耦合 粗糙海面 

分 类 号：TB561[交通运输工程—水声工程]