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Indexed by:会议论文

Date of Publication:2013-06-30

Included Journals:EI、Scopus

Page Number:170-177

Abstract:The fatigue damage of a long flexible riser undergoing vortex-induced vibration (VIV) in deepwater is numerically studied using pseudoexcitation method (PEM) in present paper. For evaluating the fluidstructure interaction problem of vortex-induced vibration of bluff bodies at high Reynolds number, the strip theory approach is taken into consideration, and the discrete vortex method (DVM) is used to calculate the vortex-induced vibration of each strip to obtain the load spectrum for the calculation of pseudo-excitation, while the finite volume method (FVM) is employed for evaluating the structure dynamics of a long flexible riser. The DVM model is validated by its comparison with the experimental results. The vortex-induced vibration is considered as a stationary random process. The response of riser to vortex induced excitation is calculated using pseudo-excitation method (PEM). The fatigue damage rate of the riser per year is evaluated and the service life of the riser can be predicted based on the Palmgren- Miner Rule. Copyright ? 2013 by the International Society of Offshore and Polar Engineers (ISOPE).