轴向板条对海洋立管涡激振动抑振的数值研究  

Numerical investigation on VIV suppression of marine risers with longitudinal slats

作　　者：王伟[1,2] 毛昭勇[1,2] 宋保维[1,2] 田文龙 丁文俊[1,2] 张婷颖 WANG Wei;MAO Zhao-yong;SONG Bao-wei;TIAN Wen-long;DING Wen-jun;ZHANG Ting-ying(School of Marine Science and Technology,Northwestern Polytechnical University,Xi’an 710072,China;Key Laboratory of Unmanned Underwater Vehicle,Ministry of Industry and Information Technology,Xi’an 710072,China)

机构地区：[1]西北工业大学航海学院,西安710072 [2]无人水下运载技术工业和信息化部重点实验室,西安710072

出　　处：《船舶力学》2020年第1期79-87,共9页Journal of Ship Mechanics

基　　金：国家自然科学基金资助项目（51179159;61572404）

摘　　要：涡激振动是一种在海洋工程领域普遍存在的流固耦合物理现象,易导致海洋立管等结构物发生疲劳损伤或失稳。本文为抑制涡激振动而提出一种附加轴向板条的方案,采用非定常流体数值计算方法求解分析不同分布形式下的轴向板条对海洋立管涡激振动特性的影响。首先定义轴向板条的分布形式;采用Newmark-β法求解立管双自由度振动方程并编写UDF,计算采用k-ω/SST湍流模型,并结合动网格技术模拟立管的振动过程。研究结果表明,轴向板条对海洋立管具有较好的抑振效果;当轴向板条数目n=20时,流向振动幅度减小78.57%,横向振动幅度减小58.10%。本文研究结果可为海洋结构物涡激振动的抑振提供参考。Vortex induced vibration(VIV)is a common fluid-structure interaction phenomenon in the field of marine engineering,which can cause fatigue damage or instability of marine structures.In order to suppress the VIV,a new scheme of longitudinal slats was proposed,and the influence of VIV on the marine risers with longitudinal slats was investigated with a transient computational fluid dynamics(CFD)method.Firstly,the distribution of longitudinal slats is defined;secondly,the Newmark-βmethod is used to solve the differential equation with two degrees of freedom and UDF for the CFD numerical calculation is compiled.k-ω/SST turbulence model and couple algorithm are used,and the vibration process of risers is simulated by using the dynamic mesh technique.The results show that the longitudinal slats have a remarkable effect on VIV suppression of marine risers.When the number of longitudinal slats is 20(n=20),the streamwise vibration amplitude will be reduced by 78.57%and the transverse vibration amplitude by 58.10%.The results of the study can provide references for the VIV suppression of marine structures.

关 键 词：轴向板条 涡激振动 抑振 双自由度 数值计算 

分 类 号：O328[理学—一般力学与力学基础]