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Date of Publication:2022-10-09

Journal:船舶力学

Issue:8

Page Number:943-953

ISSN No.:1007-7294

Abstract:According to the characteristics of steel catenary riser, a simplified model of vibration is established. Modal analyses of risers are carried out; vortex induced vibration fatigue damages are analyzed based on modal superposition method combined with modal properties and environmental current parameters. Parameters analyses of vortex induced vibration fatigue on steel catenary risers are executed by changing current velocities, risers'wall thicknesses, outer diameters, inner fluid densities and strake lengths. The results indicate that fatigue damages of risers increase with current velocity and outer diameter increase and inner fluid density decreases respectively, but the fatigue damages do not change obviously when wall thickness varies.

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