New Method in Suppressing Vortex-Induced Vibration of Marine Riser
Marine risers are key apparatus in connecting the subsea wells to the oil production platform.When the ocean current flow past a riser, the vortex shedding behind riser may induce vibration.If the frequency of vortex shedding is approaching or equal to the natural frequency of riser, the resonance will be generated.Such phenomenon leads to the potential fatigue damage of riser.Therefore, the safety and assurance of marine risers are widely arousing the interest of offshore engineering.In present paper, previous apparatus or methods in suppressing vortex-induced vibration (VIV) of risers used in marine engineering are firstly analyzed, and correspondingly the conditions in design of VIV suppressors are proposed.Based on the Bernoulli equation, the disturbance in flow around a bluff body and the relationship of vortex shedding in span-wise direction, a new method of VIV suppression is proposed.The numerical results have shown that the vibration of risers could be reduced by such disturbance.
Marine riser Vortex-induced vibration Suppression
Xingfu Zhong Liming Lin Yingxiang Wu Shiying Shi
Institute of Mechanics,CAS,Beijing,China
国际会议
上海
英文
9-12
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）