摘要
本文对BINGO9000半潜式钻井平台进行了疲劳强度分析。首先 ,建立了该平台整体三维有限元模型 ,结合北海波浪长期分布资料 ,计算了72种波浪载荷工况下的整体结构应力 ,为管节点结构局部应力分析提供边界条件。其次 ,建立了管节点结构局部有限元模型进行疲劳强度分析。在计算管节点结构应力范围时 ,本文应用热点应力法 ,并根据DNV规范提供的S -N曲线 ,以及Miner线性疲劳累积损伤准则计算出管节点结构的疲劳寿命。本文最后给出了一些有意义的结论 。
Fatigue strength of BINGO9000 semisubmersible drilling rig is analyzed in this paper.First,3D finite element model of the rig is formed.According to wave long-term distribution of North Sea,stresses of the whole structure subjected to 72 wave loads cases are calculated,which supplies boundary conditions of local tubular joint models in local stress analysis.Then,for fatigue strength analysis,local finite element models of the tubular joints are also formed.Hot spot stress method is used in the calculation of stress range.With S-N curve selected from DNV rules of fatigue strength analysis for mobile offshore units,the Miner linear fatigue damage accumulation rule is used to calculate fatigue life of the tubular joints.Finally,some useful conclusions are drawn,which will give valuable technical support for future design and building of the semisubmersible drilling rig in China.
出处
《船舶力学》
EI
2002年第2期54-63,共10页
Journal of Ship Mechanics
