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重点针对一种典型张力腿平台(TLP)进行了整体结构强度分析研究,以验证平台结构完整性设计的环境能够抵御恶劣海况的冲击。首先,建立了一种典型张力腿平台的整体有限元模型,平台主体结构按实际设计建立,上甲板结构通过甲板及梁模型对应简化。通过对操作和极端条件下载荷分析,得到平台危险波浪工况下载荷设计波参数。随后,将波浪载荷映射到整体结构的有限元模型,将张力腿上端位置建模简化为弹簧单元来反映包括旋转在内的6个自由度。最后,通过结构有限元计算软件得到结构在各危险工况下的最大等效应力及应力分布趋势,其中针对35个控制单元组,得到对应每种单元组的波浪的浪向及相位。分析结果及张力腿平台整体结构强度分析方法可供其他海洋平台强度分析参考。
The overall structural strength analysis of a typical tension leg platform (TLP) was conducted to verify the structural integrity of the platform. The designed environment can withstand the impact of adverse sea conditions. Firstly, a typical finite element model of tension leg platform is established. The main structure of the platform is established according to the actual design. The upper deck structure is simplified by the corresponding deck and beam model. Through the analysis of the loads under extreme conditions and operating conditions, the wave parameters of the load in the platform under dangerous wave conditions are obtained. Then, the wave load is mapped to the finite element model of the whole structure, and the position of the upper end of the tension leg is modeled as a spring unit to reflect the six degrees of freedom including the rotation. Finally, the maximum equivalent stress and stress distribution trend of the structure under various dangerous conditions are obtained by the structural finite element software. For the 35 control unit groups, the wave direction and phase of the wave corresponding to each unit group are obtained. Analysis results and tension leg platform overall structural strength analysis method for other offshore platform strength analysis reference.