本文设计一种新型涡轮扰流抑振装置,并在风-浪-流联合水槽中通过试验研究了该抑振装置对海洋立管涡激振动的抑制效果。在试验中,针对该新型抑振装置,提出了4种不同结构设计参数,研究了在不同外流速下各种参数工况的抑制效果及振动规律。试验结果表明:涡轮扰流抑振装置不受来流方向的限制,有较强的适用性;同时,该抑振装置能明显降低立管由漩涡脱落引起的横向振动幅值,且流速越高,抑制效果越明显,最大抑制效果可达80.2%;另外,试验结果还表明该抑振装置对立管振动的主频率影响不大。

In this paper,we designed a new type of turbine flow disruption suppression device.In order to verify the effect of this suppression device for VIV of the marine risers,a series of experiments were conducted in a wind-wave-current flume.In the experiment,by changing four different structural parameters,the suppression effects of the suppression device were observed and the vibration rules were summerized under different external flow velocities.The experimental results show that this suppression device is not sensitive to the flow direction,which means it has better applicability for practical engineering.And this device remarkably reduced the transverse vibration amplitude of the risers which was induced by vortex shedding.The results have also verified that the suppression effect of the device gradually increased with external flow velocity increased,and the optimal suppression efficiency of the suppression devices is80.2percent.In additon,this suppression device did not affect the dominant frequency of the risers obviously.