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.
出处
《船舶力学》
EI
CSCD
北大核心
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)
关键词
剪切来流
柔性立管
涡激振动
螺旋列板
sheared currents
flexible riser
Vortex-Induced Vibration
helical strakes
