剪切来流下柔性立管涡激振动抑制装置试验研究  

Experimental investigation on the suppression device of VIV of a flexible riser in sheared currents

作　　者：任铁[1] 高云[2] 付世晓[1] 杨家栋[2] 赵勇[3] 

机构地区：[1]上海交通大学海洋工程国家重点实验室,上海200240 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500 [3]大连海事大学交通运输装备与海洋工程学院,辽宁大连116026

出　　处：《船舶力学》2016年第4期497-507,共11页Journal of Ship Mechanics

基　　金：国家自然科学基金(51239007;51490674;51490675;51279101);西南石油大学科研启航计划项目(2015QHZ005);西南石油大学青年教师"过学术关"基金(201499010114)

摘　　要：文章针对柔性立管螺旋列板抑制装置在剪切流场中的涡激振动响应特性进行了试验研究,试验过程中通过旋转臂架从而形成相对剪切来流。通过测试得到的应变数据,基于模态叠加法,可得到立管的位移响应等参数。试验中针对螺旋列板的螺距和鳍高的变化进行了分析,系统地研究了不同螺旋列板状态下立管的主导频率、主导模态、无量纲振幅比以及疲劳损伤等参数。研究结果表明:螺旋列板可以很好地抑制立管的涡激振动响应;与螺距相比,鳍高对立管涡激振动响应会带来更大的影响;剪切流场中立管螺距恒定为5.0D(D为立管外径)时,鳍高为0.15D时的立管具有最好的抑制效果。Laboratory test was conducted on the flexible riser with helical strakes in order to understand its response characteristics in sheared currents.The relative sheared currents were simulated by rotating the cantilever during the experiment.Based on the modal analysis method,the displacement responses can be obtained by the measured strain.The strakes with different heights and pitches were analyzed,and the response parameters such as dominant frequency,dominant mode,non-dimensional displacement and fatigue damage were studied.The analysis results indicate that helical strakes can suppress vortex induced vibration（VIV） response effectively.Compared with strake pitch,strake height has greater influence on the VIV response.When the given pitch is 5.0D（D is the external diameter of the riser） in the sheared current,the0.15 D height always has the best suppression efficiency.

关 键 词：剪切来流 柔性立管 涡激振动 螺旋列板 

分 类 号：O357[理学—流体力学]