应力参数对圆柱壳声辐射影响的初探

对加筋圆柱壳由于肋骨数目改变所引起的结构应力参数变化对辐射噪声的影响进行了探索．运用Ansys软件建立不同结构参数的加筋圆柱壳有限元模型，计算了模型在激振力作用下的耦合振动响应，提取结构表面的位移，在Sysnoise软件中计算各种声学物理量．得到了各工况下模型在水下受激振动时的结构表面速度、水中辐射声压和辐射声功率等分布规律．找出了肋骨数目改变引起的结构应力参数与加筋圆柱壳振动和结构声辐射之间的关系，对舱段结构振动与噪声的控制有重要的参考意义．

Elementary study on influence of structural stress parameters on radiation noise of double cylindrical shell

This paper studies the influence of structural stress parameters on the noise radiation of a stiffened cylindrical shell with different rib numbers.Models of cylindrical shells with different structural parameters were built with the software ANSYS,and the coupled vibration responses of these models under excitation were calculated.Then,using the displacements of structural surfaces obtained from calculations as BEM boundary conditions,we found the different kinds of acoustic physical parameters by means of the SYSNOISE software package.Distribution rules of acoustic parameters of structural vibrations in various working cases were obtained.The relationships between the structural stress parameters,vortex-induced vibrations,and sound radiation were derived,thereby providing a significant means to control the vibration and sound radiation of submarines.