基于全耦合模型和管土作用模型的深海悬链线立管触地区域疲劳特性分析

摘要/Abstract

摘要：

利用建立的浮体、立管和系泊索全耦合模型预报悬链线立管(SCR)的顶端响应，并作为立管详细有限元模型的顶端边界条件，进行疲劳响应分析.在全局有限元分析中，SCR与海床的相互作用通过开发的触地单元模拟，该单元能够考虑海床吸力的产生和释放过程，以及海床沟槽的形状.针对不同的海床参数，计算了SCR触地区域的响应，并通过雨流计数法进行了疲劳损伤分析，得到了触地区域的疲劳损伤对海床参数的敏感性.

关键词: 悬链线立管, 触地区域, 海床吸力, 海床沟槽, 疲劳损伤

Abstract:

The upper end responses of a steel catenary riser (SCR) were predicted using the hull/riser/mooring full coupled model, which was then applied to the global finite element analysis of the SCR, where the SCR-soil interaction was simulated by the developed touchdown zone (TDZ) element. The TDZ element could capture the mobilization and release of the clay suction, and account for the seabed trench shape. By changing the seabed characteristic parameters, the parametric studies were conducted, and the fatigue sensitivity of the SCR near touchdown point (TDP) to the seabed parameters was obtained by using the rain flow counting methodology.

Key words: fatigue damage, steel catenary riser(SCR), touchdown zone, seabed suction, seabed trench

中图分类号:

P 751

王坤鹏，薛鸿祥，唐文勇. 基于全耦合模型和管土作用模型的深海悬链线立管触地区域疲劳特性分析[J]. 上海交通大学学报（自然版）, 2014, 48(04): 576-582.

WANG Kunpeng,XUE Hongxiang,TANG Wenyong. Fatigue Characteristics Analysis of Steel Catenary Riser near Touchdown Zone Based on Full Coupled Model and SCR-Soil Interaction Model

[J]. Journal of Shanghai Jiaotong University, 2014, 48(04): 576-582.

参考文献

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