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Indexed by:期刊论文

Date of Publication:2014-07-01

Journal:MARINE STRUCTURES

Included Journals:SCIE、EI

Volume:37

Page Number:86-110

ISSN No.:0951-8339

Key Words:Vortex-induced vibration; Discrete vortex method; Finite volume method; Pseudo-excitation method; Fatigue damage

Abstract:The fatigue damage of a long deepwater riser undergoing in-line and cross-flow vortex-induced vibration (VIV) in deepwater is numerically studied using pseudo-excitation method (PEM) in present paper. For evaluating the fluid-structure interaction problem of vortex-induced vibration of deepwater riser at high Reynolds number, the strip theory is employed in this paper, and the discrete vortex method (DVM) is used to calculate the VIV of each strip to obtain the load spectrum as the pseudo-excitation, while the finite volume method (FVM) is employed to evaluate the structure dynamics of a deepwater riser. The VIV is considered as a stationary random process. The response of riser to vortex induced excitation is calculated using pseudo-excitation method. The DVM model and pseudo-excitation method are both validated by comparing their numerical results with experiments. The fatigue damage of one deepwater riser is evaluated based on the Palmgren-Miner Rule. (C) 2014 Elsevier Ltd. All rights reserved.