流体和结构物之间相互耦合时易发生涡激运动现象，该现象不仅包含流固耦合的共性，还具有其自身特性。为了更好对平台涡激运动情况下周围的流场特征及自身振动特性进行研究，采用重叠网格技术模拟结构物涡激运动过程中周围流场变化及平台振动响应。所选取的研究对象原型为服役于墨西哥湾的桁架式Spar平台，建立平台硬舱部分的简化模型，监测其在不同约化速度下的升阻力变化、涡旋生成与泄放规律，分析得到平台在涡激运动时的响应状况，可以作为后续平台设计的参考，用来提高平台工作的安全性。
Vortex induced motion is easy to occur when fluid and structure are coupled with each other. This phenomenon not only contains the commonness of fluid structure coupling, but also has its own characteristics. In order to better study the characteristics of the surrounding flow field and its own vibration characteristics under the condition of vortex induced motion of the platform, the overlapping grid technology is used to simulate the changes of the surrounding flow field and the vibration response of the platform during the vortex induced motion of the structure. The prototype of the selected research object is the truss Spar platform serving in the Gulf of Mexico. A simplified model of the hard cabin of the platform is established to monitor the change of lift resistance, vortex generation and discharge law under different reduced speeds. The response of the platform in vortex induced motion can be used as a reference for subsequent platform design to improve the safety of the platform.
2022,44(17): 77-82 收稿日期：2021-10-11
DOI：10.3404/j.issn.1672-7649.2022.17.016
分类号：P751
基金项目：浙江省自然科学基金资助项目(LY19E090004)；卫星海洋环境动力学国家重点实验室开放基金资助项目(SOED1706)
作者简介：陈国庆 (1997-)，男，硕士研究生，研究方向为海洋工程流体力学
参考文献：
[1] NARENDRAN K, GUAN M Z, MA P F, et al. Control of vortex-induced motion in multi-column offshore platform by near-wake jets[J]. Computers & Fluids, 2018, 13(3): 170–177
[2] WIILLIAMSON C H K, ROSHKO A. Vortex formation in the wake of an oscillating cylinder[J]. Journal of Fluids & Structures, 1988, 2(4): 355–381
[3] 白治宁, 肖龙飞, 程正顺,等. 深吃水半潜式平台涡激运动响应模型实验研究[J]. 船舶力学, 2014, 18(04): 377–384
[4] RIJKEN O. Examining the effects of scale, mass ratios and column shapes on the vortex induced motion response of a semisubmersible through CFD analyses[C]// International Conference on Ocean, Offshore and Arctic Engineering, San Francisco, USA, 2014.
[5] 谷家扬, 谢玉林, 陶延武,等. 新型浮式钻井生产储油平台涡激运动数值模拟及试验研究[J]. 上海交通大学学报, 2017, 51(7): 878–885
[6] 唐世振. 考虑顺流向振动的深水顶张力立管涡激振动分析[D]. 青岛：中国海洋大学, 2010.
[7] KOOPMAN G H. The vortex wakes of vibrating cylinders at low Reynolds numbers[J]. Journal of Fluid Mechanics, 1967, 28: 501~512.
[8] GRIFFIN O M. Vortex-excited cross flow vibrations of a single circular cylinder[J]. ASME Journal of Pressure Vessel Technology, 1980, 102: 158−166.
[9] 杨晓彬, 许国冬. 基于重叠网格法的飞机水上降落水动力砰击载荷研究[J]. 振动与冲击, 2020, 39(2): 57–63
[10] 曹淑刚, 黄维平, 顾恩凯. 考虑流固耦合的弹性圆柱体涡激振动研究[J]. 振动与冲击, 2015, 34(1): 58–62
[11] 王颖. Spar平台涡激运动关键特性研究[D]. 上海: 上海交通大学, 2010.
[12] 邓跃. 低雷诺数下均匀流和振荡流共同作用的圆柱体受迫振动和涡激振动研究[D]. 青岛: 中国海洋大学, 2014.
