具有裂纹损伤桩腿的海洋石油平台有限元分析  

Finite element analysis of cracked members of ocean platform structures

作　　者：秦太验[1] 柳春图[2] 段梦兰[3] 阚常珍[2] 

机构地区：[1]中国农业大学工程基础科学部,北京100083 [2]中国科学院力学研究所,北京100080 [3]中国船级社海工部,北京100006

出　　处：《海洋工程》2000年第3期15-19,共5页The Ocean Engineering

摘　　要：采用有限元分析方法和断裂力学方法 ,将含裂纹构件的裂纹段以线弹簧处理 ,建立了带有裂纹损伤桩腿的等效梁和管单元的单元刚度矩阵的计算方法。为检验方法的正确性 ,使用该方法对几种损伤构件进行了强度计算 ,并与有限元细化网格计算结果和实验结果进行比较 ,最后将等效单元计算程序接入大型有限元程序 Super SAP,对受损后的平台整体结构进行了应力计算和强度分析。The finite element stiffness matrix of the equivalent beam or pipe of the cracked leg of the platform is derived using the finite element method. The stresses and displacements of some damaged components are calculated, and the numerical solutions are in good agreement with those obtained by the fine mesh finite element method of the Super SAP procedure. Finally, by using the Super SAP combined with the procedure of the proposed equivalent element method, the stresses of some platform structures are calculated and analyzed.

关 键 词：海洋平台 桩腿 有限元 裂纹 

分 类 号：TE951.02[石油与天然气工程—石油机械设备]