具有失真性变形与凹坑耦合损伤的海洋平台桩腿有限元分析

Finite element analysis of the deformed-sunken damaged members of ocean platform structures

采用有限元分析方法 ,建立了有失真性变形与凹坑耦合损伤桩腿的等效梁和管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 ,结果表明 ,三种结果符合很好。最后 ,将等效单元计算程序接入大型有限元程序 Super SAP,然后对受损后的平台整体结构进行了应力计算和强度分析。

The element stiffness matrix of the equivalent beam or pipe of the deformed\|sunken damaged leg of the platform is derived through the finite element method. The stresses and displacements of some damaged components are calculated. The numerical solutions agree with those obtained by the fine mesh finite element method of the Super SAP procedure. Finally, using the Super SAP combined with the procedure of the present equivalent element method, the stresses of some platform structures are calculated and analyzed.