摘要
利用有限元(FEM)/边界元法(BEM),建立了桨-轴-船尾部结构耦合振动模型,以实效伴流场下的螺旋桨轴承力作为激励源,分析了螺旋桨不同方向轴承力对尾部结构声振特性的影响.研究结果表明:在螺旋桨轴承力的作用下,船体结构振动响应峰值与螺旋桨倍叶频(BPF)或尾部结构固有频率相近;尾部结构水下辐射噪声特性随频率变化明显,当频率较低时,尾部结构的辐射噪声沿船长的分布相对均匀;随着频率升高,尾部结构的局部声辐射特性增强;水平力为引起船体结构振动并向外辐射噪声的主要分量.
Based on the finite element method(FEM)and boundary element method(BEM),the coupled vibration truncation model of propeller-shaft-hull structure was established to analyze the influence of propeller excitations in different directions on the vibration and acoustic radiation of the stern structure.The research shows that the vibration response peak of the hull structure is similar to the natural frequency of blade passing frequency(BPF)or stern structure by propeller excitations.The characteristics of the underwater radiated noise of the stern structure change obviously with the frequency,the radiated noise of the stern structure is distributed evenly along the ship length when the frequency is low.With the increase of frequency,the local acoustic radiation characteristics of stern structure get significantly enhanced.The vibration and acoustic radiation is mainly caused by horizontal force of propeller.
作者
崔杰
高聪
魏强
李海超
CUI Jie;GAO Cong;WEI Qiang;LI Haichao(College of Naval Architecture and Ocean Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,Jiangsu China;College of Shipbuilding Engineering,Harbin Engineering University,Harbin 150001,China;China Ship Development and Design Center,Wuhan 430064,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第2期126-132,共7页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
哈尔滨工程大学博士研究生科研创新基金资助项目(HEUGIP201801)
中央高校基本科研业务费专项资金资助项目(HEUCFD1515,HEUCFM170113)
国家重点研究发展计划资助项目(2016YFC0303406)
国家自然科学基金资助项目(51209052)
总装预研基金资助项目(6140210020105)
中国博士后基金资助项目(2014M552661).
关键词
尾部结构
声固耦合
有限元
边界元
振动
声辐射
stern structure
acoustic-structure coupling
finite element
boundary element
vibration
acoustic radiation
