肋骨侧向加强对环肋圆柱壳水下振动与声辐射的影响  

Effects of Lateral Reinforced Plates on Underwater Vibro-Acoustic Features of Ring-Stiffened Cylindrical Shells

作　　者：王路才[1] 周其斗[1] 纪刚[1] 

机构地区：[1]海军工程大学舰船工程系

出　　处：《中国舰船研究》2013年第2期84-89,共6页Chinese Journal of Ship Research

摘　　要：采用结构有限元耦合流体边界元的附加质量附加阻尼算法,对肋骨采用不同侧向加强材的环肋圆柱壳水下振动与声辐射进行数值计算,并对数值计算结果进行比较和分析。讨论了4种侧向加强材对环肋圆柱壳水下振动与声辐射的影响,结果表明:4种肋骨侧向加强材对环肋圆柱壳结构的减振降噪是有利的,肋骨采用扶强材、半肋距肘板、整肋距肘板和纵筋加强其减振降噪效果会逐渐增强;随着频率的升高,各种侧向加强材的减振降噪效果也逐渐增强;肋骨侧向加强材主要对环肋圆柱壳肋骨间的振动产生影响,对其低频整体振动影响较小。An approach combining the finite element method and the boundary element method is pro- posed in this paper to calculate the underwater vibration and acoustic radiation of a ring stiffened cylindri- cal shell under the reinforcement of various lateral plates. The effects of different lateral reinforced plates to the cylindrical shell are analyzed by comparing the respective numerical results. It is shown that lateral re- inforced plates may reduce the vibration and acoustic radiation of the cylindrical shell, where the reduction effects are most significant on the plate build from longitudinal stiffeners, followed sequentially by stiffen- ers, semi-spacing boards and whole spacing boards. Also, the vibration and noise reduction becomes stronger as the frequency goes higher. It is worth noticing that the effects described in this paper are mainly restricted within the areas between the rings on the shell, and they are not so significant on low frequency vibration.

关 键 词：侧向加强材 流固耦合 振动 辐射噪声 圆柱壳 

分 类 号：U661.44[交通运输工程—船舶及航道工程]