扰流板对钢管塔风振治理效果的试验研究

Test research on the effect of spoiler on wind vibration control of steel pipe tower

输电塔是常见的高耸结构,在电力工程中被广泛应用。塔中某些长细比较大的钢管杆件在风速较小时容易发生垂直于风向的微风振动,长期的振动容易导致杆件疲劳破坏。针对目前常规的加装扰流板减振措施缺乏理论指导和试验验证的问题,采用风洞试验的手段,对扰流板的尺寸进行优化,测试减振效果。通过测试结果发现,扰流板的安装数量和布置间距对减振效果的影响十分显著。综合考虑减振效果和风荷载,在工程应用中,推荐安装4组宽2D高0.5D扰流板,间距4D布置(D为管径)。该布置方案在风洞测试中取得了显著的减振效果,减振率达到95%以上。

Transmission towers are common high-rise structures and are widely used in power engineering.Some steel pipe rods with relatively large length and slenderness in the tower are prone to breeze vibration perpendicular to the wind direction when the wind speed is small.Long-term vibration is likely to cause fatigue damage of the rods.At present,conventional spoiler measures lack theoretical guidance and experimental verification.In this paper,wind tunnel tests are used to optimize the size of the spoiler and test the damping effect.Through the test results,it is found that the number of spoilers and the arrangement spacing have a significant impact on the vibration reduction effect.Considering the damping effect and wind load comprehensively,in engineering applications,it is recommended to install 4 sets of 2D×0.5D spoilers with a 4D spacing(D is the pipe diameter).This layout has achieved significant vibration reduction effects in wind tunnel tests,with a vibration reduction rate of over 95%.