舱段截断时边界条件的选取方法  

Selection method of boundary conditions in the cabin segment truncation

作　　者：丁宏[1] 陈美霞[1] 魏建辉[1] 谢坤[1] 

机构地区：[1]华中科技大学,湖北武汉430074

出　　处：《舰船科学技术》2014年第2期44-48,共5页Ship Science and Technology

基　　金：华中科技大学自主创新研究基金资助项目(20122N056)

摘　　要：为减小工作量,常常需要截取某个舱段进行单独分析。本文研究舱段截断对振动模态和谐响应的影响,分析截断处的位移、内力和弯矩的连续性边界条件。对单舱段一端分别施加自由、周向径向简支约束、轴向约束以及三向约束等不同的边界条件,并与全船模型的I舱段进行对比,从模态的固有频率和频响曲线两方面进行比较。结果表明,在舱段频率以上,将舱段截断处理为简支约束比较合理。In order to reduce the amount of computation, it is often need to analysis some cabin cut off from the overall structure. This paper focused on the structure-cutoff effects on vibration modes and harmonic response, analyzed the continuity boundary conditions of displacement, force and moment of the junction. Different boundary conditions were applied to a single cabin, compared with the cabin in a whole ship model, in terms of natural frequency and frequency response curve results. It＇ s relatively reasonable to treat the truncation as circumferential and radial simply supported constraints.

关 键 词：圆柱壳舱段 结构截断 边界条件 动态特性 

分 类 号：U663.2[交通运输工程—船舶及航道工程]