三体船型疲劳强度评估和分析

摘要

Fatigue analysis of typical structural details of trimaran is carried out according to related rules. Loads characteristics of trimaran are analyzed based on computation and test result. Critical fatigue hotspots are picked out after coarse mesh setting and whole ship FEM stress calculation. Cumulative damage on these hotspots is estimated based on stochastic analysis and stress calculation with fine mesh. Finally, fatigue characteristics of trimaran are summarized.%参照相关规范,对三体船结构的典型节点进行疲劳强度分析.通过波浪载荷计算和试验结果分析了三体船的载荷特征.通过粗网格下的全船有限元应力计算确定了疲劳热点部位.对这些部位采用精细网格进行了基于谱分析的热点应力计算,从而给出了热点部位的累积损伤.最后总结了三体船的疲劳特性.