自由液面形状对水中圆柱壳声振特性影响  

Influence of free-surface shape on acoustic and vibration characteristics of cylindrical shells in water

作　　者：张雯 刘彦森 徐尧 黎胜[1] ZHANG Wen;LIU Yansen;XU Yao;LI Sheng(School of Naval Architecture Engineering,Dalian University of Technology,Dalian 116024,China;Key Laboratory for Underwater Test and Control Technology,Dalian 116013,China)

机构地区：[1]大连理工大学船舶工程学院,辽宁大连116024 [2]水下测控技术重点实验室,辽宁大连116013

出　　处：《舰船科学技术》2024年第22期8-16,共9页Ship Science and Technology

摘　　要：利用有限元方法建立了单层有限长圆柱壳的声-固耦合模型,并通过数值模拟研究了其振动及声辐射特性。针对水下和水面2种工况下的圆柱壳,系统分析了其在不同波幅、波长及相位变化的规则波作用下的振动与声学特性。研究结果表明,自由液面形状对圆柱壳的振动-声辐射有显著影响,且这种影响随着频率升高而增强,特别是在中高频段的影响尤为明显。同时,相比于水下全浸没状态下的圆柱壳,自由液面形状对水面半潜圆柱壳的振动声学特性影响更为显著。本文研究对考虑自由液面对舰船振动声辐射特性的影响有一定的参考价值。Employing the finite element method,a coupled acoustic-structure model was established for a singlelayered finite-length cylindrical shell,and its vibration and sound radiation characteristics were studied through numerical simulations.For both submerged and surface-mounted cylindrical shells,a systematic analysis was conducted to examine their vibration and acoustic properties under the influence of regular waves with varying amplitudes,wavelengths,and phases.The research findings revealed that the shape of the free surface has a significant impact on the distribution of vibration modes and sound radiation patterns in cylindrical shells,with this influence increasing as the frequency rises,being particularly pronounced in the mid to high-frequency range.Furthermore,it was found that the effect of the free surface is more substantial on the vibro-acoustic characteristics of semi-submerged cylindrical shells at the waterline compared to fully submerged ones.This study provides a valuable reference for considering the influence of free surface on the vibration and acoustic radiation characteristics of ships.

关 键 词：有限长圆柱壳 振动声辐射 规则波 有限元方法 

分 类 号：U661.44[交通运输工程—船舶及航道工程]