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。

Analysis of Acoustic Radiation from Orthogonally Stiffened Cylindrical Shell in Water Based on the Finite Element Method CHEN Jun-ming 1,CHEN Ying-bo 2,HUANG Yu-ying 3 (1.School of Sciences, WUT, Wuhan 430070, China; 2.Design and Research Institute, WUT, Wuhan 430070, China; 3.School of Civil Engineering, HUST, Wuhan 430074, China)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.stiffened cylindrical shell; coupling effect; acoustic radiation; finite element method