摘要
水下加肋壳体的结构声问题在水下航行器隐身技术中有更广阔应用。以受谐激励作用的水中双向正交加肋弹性薄圆柱壳为研究对象 ,考虑介质与结构振动的耦合效应 ,研究耦合系统的声振问题。解析法求解此类问题存在困难 ,运用有限元方法计算了双向正交加肋圆柱壳体的声辐射远场声压。算例结果表明 :在设置环肋的基础上再加设纵肋 ,能有效地改善结构的声辐射特性。
The structural acoustic problem of the ribbed shells in water is extensively applied in the hiding technology of the underwater navigation devices. Aimed at the coupling effect between medium and structure, the finite element method is employed to calculating the sound-pressure field radiated by a harmonically excited, orthogonally stiffened thin elastic circular cylindrical shell in underwater. It is shown that the axial-stiffeners can improve efficiently the mechanical and acoustical characteristics of the coupling system.
出处
《武汉理工大学学报》
CAS
CSCD
2004年第4期74-76,共3页
Journal of Wuhan University of Technology
基金
国家自然科学基金 (10 172 0 38)
关键词
加肋圆柱壳
耦合效应
声辐射
有限元
stiffened cylindrical shell
coupling effect
acoustic radiation
finite element method
