| Truss Spar平台桁架管节点疲劳分析 |
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| 引用本文： | 陈鹏耀,薛鸿祥,唐文勇,张圣坤.Truss Spar平台桁架管节点疲劳分析[J].海洋工程,2007,25(2):15-20. |
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| 作者姓名： | 陈鹏耀 薛鸿祥 唐文勇 张圣坤 |
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| 作者单位： | 上海交通大学,海洋工程国家重点实验室,上海,200030 |
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| 基金项目： | 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) |
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| 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。
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| 关 键 词： | Truss Spar平台 管节点 疲劳分析 有限元 |
| 文章编号： | 1005-9865（2007）02-0015-06 |
| 收稿时间： | 2006-07-21 |
| 修稿时间： | 2006年7月21日 |
Fatigue analysis of tubular joints in a Truss Spar platform |
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| CHEN Peng-yao,XUE Hong-xiang,TANG Wen-yong,ZHANG Sheng-kun.Fatigue analysis of tubular joints in a Truss Spar platform[J].Ocean Engineering,2007,25(2):15-20. |
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| Authors: | CHEN Peng-yao XUE Hong-xiang TANG Wen-yong ZHANG Sheng-kun |
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| Abstract: | It is very difficult to accurately analyze structure fatigue strength of a truss 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 tobe 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. |
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| Keywords: | truss spar platform tubular joint fatigue analysis FEM |
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