复合材料圆柱壳的波动特性研究  

Dynamic Characteristics for a Laminated Composite Cylindrical Shell

作　　者：陈乐昆[1] 刘敬喜[1] 谭安全[1] 刘元丹[1] 

机构地区：[1]华中科技大学船舶与海洋工程学院,武汉430074

出　　处：《船海工程》2011年第6期96-98,102,共4页Ship & Ocean Engineering

摘　　要：基于壳体理论,研究圆柱壳的频散特性以及相速度和群速度特性,利用数值方法求取特征方程的实数、虚数和复数根,分析其物理含义。研究表明,传播波的数量随激励频率的增加而增加,这些传播波的起始频率都是某一支近场波的截止频率。The dynamic characteristics of laminated composite cylindrical shells were studied based on the shell theory. There are 3 kinds of roots of characteristic equations of shells. The meanings of these roots were analyzed. The dispersion, extensional phase velocities, group velocities and amplitude ratio of various waves were obtained, showing that the number of propagate waves are greater with driving frequency increasing, and the start frequencies are the end frequencies of near field waves.

关 键 词：复合材料圆柱壳 频散特性 群速度 相速度 

分 类 号：U663.3[交通运输工程—船舶及航道工程]