钢管节点局部柔度的等效单元及其在海洋平台结构分析中的应用

为了在海洋平台结构分析中计及管节点局部柔度的影响，本文建立了一种在海洋平台有限元分析中代表空间管节点局部柔度的等效单元，它可方便地与通用的结构有限元程序配合，对三维平台结构进行精确的静动力分析．作者编制的与ＳＡＰ５配合使用的前处理程序，可自动生成符合ＳＡＰ５输入格式的等效单元读入刚度矩阵数据．通过算例说明，在海洋平台结构分析中计及管节点局部柔度是十分必要的．

Equivalent Element of Steel Tubes with Local Joint Flexibility and Its Use in Structural Analysis of Offshore Platform

In order to consider the local joint flexibility in structural analysis of offshore platforms,an equivalent element model is established. With the equivalent element the three-dimensional golbal structural analysis of offshore platforms in which the local flexbility is taken into account can be performed by using the Finite Element Method. A pre-processing program to generate the stiffness matrix data according to the input data form of SAP5 has been developped. Numerical examples show the necessity of considering local joint flexibility in the structural analysis of offshore platforms.