Fatigue Characteristics Analysis of Steel Catenary Riser near Touchdown Zone Based on Full Coupled Model and SCR-Soil Interaction Model

Abstract

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

CLC Number:

P 751

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.

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