某400ft自升式钻井平台主船体结构强度分析

摘要

考虑到某400 ft自升式钻井平台在水深91．4 m作业工况下固有周期与波浪周期相近，动态放大因子较大，作业工况下悬臂梁－钻台系统具有最大工作载荷，针对该工况分析主船体结构强度，介绍主船体强度分析中模型建立和载荷施加的注意点与细节处理，确定主船体高应力区域，为自升式钻井平台的主船体结构设计和强度校核提供参考。%The natural period of the 400 ft self-elevating drilling unit in operational condition with 91.4 m water depth is close to the wave period which leads to a high dynamic amplification factor, and the combined loading of cantilever-drill floor sys-tem is maximum in the operation condition.The structural strength of the main hull in this load case is analyzed by FEM.The key points of modeling and loads applying methods in structural strength analysis of the main hull are studied in detail.The high-stress areas are found and it provides reference for the structural design and strength assessment of the main hull.