基于流固耦合的锚索涡激振动抑制方法研究  

PATTERNS OF CABLE VIV SUPPRESSION BASED ON THE FLUID-STRUCTURE INTERACTION

作　　者：晁春峰[1,2] 项贻强 林建平[3,4] 

机构地区：[1]浙江大学土木工程系,杭州310058 [2]浙江省交通科学研究院,杭州310006 [3]桥梁无损检测与工程计算四川省高校重点实验室,成都610059 [4]华侨大学土木工程学院,福建厦门361021

出　　处：《力学与实践》2015年第6期725-730,共6页Mechanics in Engineering

基　　金：国家自然科学基金(51279178);桥梁无损检测与工程计算四川省高校重点实验室开放基金项目(2014QZJ05)资助

摘　　要：悬浮隧道锚索的涡激振动会加剧锚索的疲劳破坏,进而影响悬浮隧道的使用寿命和安全.文章在海洋立管涡激振动抑制研究的基础上,考虑悬浮隧道锚索倾斜角度和来流方向的影响,采用流固耦合的数值方法,对整流罩方法和三控制杆方法的抑制效果进行了分析.结果表明,在顺来流方向,两种方法均具有良好的抑振效果;锚索有倾斜的情况下,三控制杆方法的效果会有所提升;但在来流方向改变时,整流罩方法具有较强的适应性.The vortex-induced vibration（VIV） will accelerate the fatigue failure of the cables and reduce the life and threaten the safety of the SFT（submerged floating tunnel）. In this paper, the effect of the controlling VIV of cables with the fairing or the three control rods is analyzed by using the numerical method based on the fluid-structure interaction. The influence of different cable tilt angles and flow directions on the vibration of the cables is explored with regard to the vortex-induced vibration suppression of the marine riser. The results show that the two proposed methods have a good vibration control effect along the flow direction. The fairing has a more prominent effect and the vibration suppression effect of the three control rods will be greatly improved if the cables are tilted. The analysis also demonstrates that the three control rods may partly increase the VIV of the cables when the flow direction changes. In summary, the fairing has a better adaptability.

关 键 词：悬浮隧道 锚索 流固耦合 涡激振动 振动抑制 

分 类 号：U459.9[建筑科学—桥梁与隧道工程]