塔架式单点系泊系统中软钢臂结构强度和疲劳分析

Structure Strength and Fatigue Analysis of Soft Yoke in Tower Type Single Point Mooring System

阐述从系泊时域分析结果中筛选极端工况软钢臂结构设计载荷的方法,采用考虑惯性释放的有限元算法计算结构应力的过程,并推荐结构强度和稳定性校核的接受衡准。根据疲劳载荷长期分布,采用有限元方法计算相关各疲劳载荷对应的疲劳应力因子,进而求得所有位置疲劳应力的长期分布,采用确定性疲劳分析方法计算疲劳寿命。

The loads selection method for yoke structure design in extreme condition and the procedure of finite element(FE)analysis considering inertia release are expounded,the acceptance criteria of structure yielding and buckling strength check are recommended.Based on the long-term distribution of fatigue loads,FE analysis is used to get the fatigue stress factor for each fatigue load,the long-term distribution of fatigue stress at all positions is obtained,and deterministic method of fatigue assessment is used to calculate the fatigue life.