带格栅腔体结构水下声辐射性能研究  

Study on Underwater Acoustic Radiation Performance of Cavity Structures with Grilles

作　　者：胡昊明 崔洪宇[1] HU Haoming;CUI Hongyu(School of Naval Architecture and Ocean Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024

出　　处：《噪声与振动控制》2022年第5期85-89,共5页Noise and Vibration Control

摘　　要：带格栅腔体结构在流激作用下极易产生结构振动和噪声,较大噪声会影响舰船隐身性能。本文采用分离涡模拟并结合有限元耦合边界元方法,对栅条不同布放方式下腔体结构的绕流流场和水下声辐射特性进行分析。研究结果表明,在来流激励下,带格栅腔体结构的栅条振动响应较大,在共振频率处有较大的声辐射,与来流方向平行的格栅声辐射性能优于同来流方向垂直的格栅,结构振动声功率级随来流速度增加而增大。The cavity structure with grille can generate vibration and noise very easily under the excitation of water flow, and the large noise can affect the stealth performance of the ship. In this paper, the flow field and underwater acoustic radiation characteristics of the cavity structure with grille are investigated by DES and FEM/BEM. The results show that the cavity structure with grille has larger vibration response under the excitation of water flow and larger acoustic radiation at the resonant frequency, and the grille parallel to the flow direction has better acoustic radiation performance than the grille perpendicular to the flow direction. The acoustic power level increases with the increasing of the flow velocity.

关 键 词：声学 分离涡模拟 有限元 边界元 振动声辐射 格栅腔体结构 

分 类 号：TB532[理学—物理]