Vortex-induced vibration is one of the significant inducing factors of fatigue damage in steel catenary risers(SCRs),thus vortex-induced vibration analysis holds crucial importance in the design of SCRs.OrcaFlex,with its robust functionality and widespread application in marine engineering,offers two fatigue damage prediction methods for vortex-induced vibration,namely the frequency domain prediction method based on modal superposition and the time domain prediction method based on the Iwan-Blevins wake oscillator model.The time domain prediction model of OrcaFlex for vortex-induced vibration only considers fatigue damage caused by transverse vortex-induced vibration.An interface for the development of a two-degree-of-freedom wake oscillator model for vortex-induced vibration is established based on OrcaFlex's time domain prediction method,considering the influence of floating platform motion on the excitation of SCRs due to vortex-induced vibration.This facilitates the prediction of fatigue damage in SCRs due to two-degree-of-freedom vortex-induced vibration.
关键词
钢悬链立管/疲劳损伤/时域预报/涡激振动/OrcaFlex/尾流振子模型
Key words
steel catenary riser(SCR)/fatigue damage/time domain prediction/vortex-induced vibration(VIV)/OrcaFlex/wake oscillator model
维普
万方数据