肋板与流体的耦合对水下双壳体声辐射的影响  

The Coupling of Ribbed Plates and Fluid Effects on the Vibration and Sound Radiation of Submerged Double Cylindrical Shells

作　　者：包宜颉 周其斗[1] 纪刚[1] 黄振卫[1] 

机构地区：[1]海军工程大学舰船工程系,湖北武汉430033

出　　处：《中国舰船研究》2014年第5期85-92,共8页Chinese Journal of Ship Research

摘　　要：以水下双层圆柱壳为研究对象,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,计算各工况下分别忽略和考虑层间实肋板与内域流体耦合作用这2种情况下结构的振动与声辐射,并从均方法向速度级和辐射声功率级这2个方面分析讨论壳间肋板与内域流体耦合作用对水中双层圆柱壳振动与声辐射的影响。结果表明:壳间肋板与流体耦合作用对水下双层圆柱壳振动与声辐射影响很小。壳间肋板数量越多,厚度越薄,内壳半径越小,肋板与内域流体的耦合作用对结构的振动与声辐射的影响则越小。An approach combining the finite element with boundary element method is proposed to calcu-late the vibration and sound radiation of submerged double cylindrical shells in different conditions（consid-ering and neglecting the coupling of the ribbed plate between inner and outer shells and fluid between in-ner and outer shells under two kinds of conditions）. The coupling effects on the vibration and sound radia-tion of submerged double cylindrical shells is analyzed by comparing the numerical results in two perspec-tives： mean velocity level and radiated sound power level. The result indicates that the coupling has little in-fluence on the vibration and sound radiation, and the less space between the two shells, the thinner the ribis, and the smaller radius of the inner shell is, the more negligible the coupling effect will be.

关 键 词：内域流体 肋板 流固耦合 双层圆柱壳 振动 声辐射 

分 类 号：U661.44[交通运输工程—船舶及航道工程]