作　　者： ; ; ;

机构地区： 广东海洋大学工程学院

出　　处： 《船舶力学》 2011年第6期688-697,共10页

摘　　要： 在很多工程状况下,特别是船舶和海洋工程领域,管道的振动、噪声和疲劳失效是极其严重的问题。文章对充液管道的轴对称波的传播与衰减进行了解析研究。首先推导了周向模态n=0的管道轴对称振动方程,然后分别得到s=1流体波和s=2壳体波的波数表达式。接着,对波数以及管道和流体的阻抗进行了数值计算和讨论。结果发现,在这种模态下,波的传播与衰减随频率变化(频散特性),与壳体厚径比和流体密度密切相关。事实证明,这种耦合振动分析方法是简洁有效的。 Vibration,noise and fatigue failure of pipelines are serious problems in many engineering situations,especially in ship and ocean engineering areas.In this paper,the acoustic propagation and attenuation characteristics of axisymmetrical eigenmodes in a cylindrical,elastic,fluid-filled pipe are investigated analytically.Pipe equations for n=0 axisymmetrical wave motion are derived,and analytical expressions of wavenumber are obtained for s=1 and s=2 waves,which correspond to a fluid dominated wave and an axial shell wave,respectively.The numerical results for wavenumber and impedances of pipe and fluid are obtained and discussed.It shows that the frequency dependent phase velocity and attenuation（dispersion characteristics） of this mode depend strongly upon the shell thickness/radius ratio and the density of the contained fluid.It seems that this analysis method is simple and effective.

关 键 词： 充液管道 轴对称波 波数 传播 衰减

领　　域： [理学] [理学] [一般工业技术] [理学] [理学]