【摘要】 以南海现役某半潜式钻井平台的表面裂纹为研究对象,用有限元法和断裂力学理论,对平台结构整体及裂纹尖端局部断裂力学进行了分析,确定了描述裂纹及其在钻井平台局部扩展的力学参量。采用ABAQUS软件构造板壳结构表面裂纹,研究了决定裂纹扩展的断裂力学参量以及腐蚀等因素对裂纹尖端断裂力学参量分布的影响,为含裂纹平台结构安全评估提供一种科学的方法。更多还原

【Abstract】 The global structure analysis and local crack evaluation on the semi-submersible platform servicing in South China Sea were carried out by finite element method and fracture mechanics theory.The fracturing parameters for describing the cracks and their propagation on the local shell plate of the platform were determined.The effects of local shell plate corrosion factor on the fracturing parameters distributed around the crack tip were investigated using ABAQUS software.The global structural strength evaluation to obtain the necessary boundary conditions for the analysis of local fracture was made.The distribution of stress intensity factor along crack front was analyzed by the fracture mechanics.更多还原