基于海床吸力和刚度衰减模型的深海钢悬链线立管动力响应分析

上海交通大学学报（自然版） ›› 2011, Vol. 45 ›› Issue (04): 585-589.

基于海床吸力和刚度衰减模型的深海钢悬链线立管动力响应分析

王坤鹏，薛鸿祥，唐文勇

（上海交通大学海洋工程国家重点实验室，上海 200240）

收稿日期:2010-10-29 出版日期:2011-04-29 发布日期:2011-04-29
基金资助:
国家科技重大专项资助项目（2008ZX0502600504），海洋工程国家重点实验室自主研究课题资助项目（GKZD010031）

Dynamic Response Analysis of Deepwater Steel Catenary Riser Based on the Seabed-Suction and Stiffness-Degradation Model

WANG Kun-Peng, XUE Hong-Xiang, TANG Wen-Yong

(State Key Laboratory of Ocean Engineering，Shanghai Jiaotong University，Shanghai 200240，China）

Received:2010-10-29 Online:2011-04-29 Published:2011-04-29

摘要/Abstract

摘要： 运用ABAQUS创建触地单元，将立管海床作用的模拟简化为3种模型：线性刚度、线性截断、线性截断并考虑海床吸力和刚度衰减.将浮体垂向运动作为立管顶端边界输入，并对3种简化模型进行了计算比较.结果表明：考虑立管海床分离以及吸力效应对计算结果的影响很大；考虑吸力效应时，在立管和海床分离的阶段会有较多的疲劳应力循环.第③类触地单元较好地反映了吸力的产生和释放过程，其包含的海床刚度衰减模型也给出了令人满意的结果.
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关键词: 钢悬链线立管, 立管-海床作用, 触地单元, 海床吸力, 刚度衰减

Abstract: A touch-seabed element was created in ABAQUS to simulate the soilriser interaction which is reduced to three models: linear stiffness, linear stiffness with soil-riser’s separateness, soilriser’s separateness and considering the suction and the degradation of the seabed. Considering the floater’s z-motion at the riser’s top boundary, the three models were analyzed and compared. The result shows that the soil-riser’s separateness and suction have great effect on the computation result. If the model considers the suction，there will be many stress cycles at the soil-riser separateness stage. The third touch-seabed element well shows the generation and release of suction, and the seabed stiffness degradation model included in it also gives satisfactory results.

Key words: steel catenary riser, soil-riser interaction, touch-seabed element, seafloor suction, stiffness degradation

王坤鹏, 薛鸿祥, 唐文勇. 基于海床吸力和刚度衰减模型的深海钢悬链线立管动力响应分析[J]. 上海交通大学学报（自然版）, 2011, 45(04): 585-589.

WANG Kun-Peng, XUE Hong-Xiang, TANG Wen-Yong. Dynamic Response Analysis of Deepwater Steel Catenary Riser Based on the Seabed-Suction and Stiffness-Degradation Model[J]. Journal of Shanghai Jiaotong University, 2011, 45(04): 585-589.

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