Truss Spar平台桁架管节点疲劳分析  

Fatigue analysis of tubular joints in a Truss Spar platform

作　　者：陈鹏耀[1] 薛鸿祥[1] 唐文勇[1] 张圣坤[1] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200030

出　　处：《海洋工程》2007年第2期15-20,共6页The Ocean Engineering

基　　金：国家自然科学基金资助项目(50323004);上海市科委重大基础研究课题资助项目(05DJ14001)

摘　　要：Truss Spar平台在风、浪、流的作用下,结构受力十分复杂,准确分析其疲劳强度相当困难。通过建立Truss Spar平台三维有限元模型,利用HydroD软件进行载荷预报、波浪搜索,得到产生最大应力幅响应的最不利浪向和相位角。运用Sestra软件进行整体有限元分析,得到的结果作为桁架管节点细化模型的边界条件,再用Nastran软件进行局部分析求得节点的热点应力,修正壁厚影响。最后根据DNV规范的S-N曲线计算了管节点的疲劳寿命。It h very difficult to accurately analyze structure fatigue strength of a tress spar platform because of the complex loads generated by constant wind, wave and current actions. A good method is provided to predict the load and calculate the fatigue strength of tubular joints. Three - dimension finite element model of the truss spar platform is introduced in HydroD to search the most serious sea- state where structure stress response amplitude reaches the maximum. Then the FEM calculation is carried out in Sestra to obtain the boundary condition＇ s data robe used in calculating detailed tubular joint＇s model, and with the help of Nastran, hot spot stress can be gained. Finally, according to S- N curves in DNV rules, the life of tubular joints can be predicted after refining the previous hot spot stress.

关 键 词：TRUSS SPAR平台 管节点 疲劳分析 有限元 

分 类 号：P756.2[天文地球—海洋科学]