翼板角部处理方柱全风向角风致振动性能风洞试验研究  

Wind tunnel tests on the wind induced vibration performance of a square cylinder with wing plates in all wind directions

作　　者：温青[1,2] 郭建炜[1] 龙航 翟晓亮 华旭刚[2] 孙洪鑫[1] WEN Qing;GUO Jianwei;LONG Hang;ZHAI Xiaoliang;HUA Xugang;SUN Hongxin(Hunan Provincial Key Laboratory of Structures for Wind Engineering and Vibrational Control,College of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Key Laboratory for Wind and Bridge Engineering of Hunan Province,Hunan University,Changsha 410082,China;CCCC First Highway Consultants Co.,Ltd.,Xi’an 710075,China)

机构地区：[1]湖南科技大学结构抗风与振动控制湖南省重点实验室,湖南湘潭411201 [2]湖南大学风工程与桥梁工程湖南省重点实验室,长沙410082 [3]中交第一公路勘察设计研究院有限公司,西安710075

出　　处：《振动与冲击》2024年第22期287-292,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(52378511);陕西省自然科学基础研究计划项目(2021JM-606)。

摘　　要：方形结构和构件在工程结构中应用广泛,其风致振动问题随着高度和跨度的增加而更加突出,角部处理是方形截面结构工程中常用的一种气动措施。为了研究翼板角部处理对方柱全风向角风致振动性能的影响,开展了标准方柱和翼板角部处理方柱的全风向角节段模型风洞试验,分析了标准方柱和带翼方柱全风向角涡激振动和驰振性能。结果表明:(1)翼板角部处理减小了方柱发生涡激振动的风向角范围,但是,最大涡激振动振幅和风速锁定区间明显大于标准方柱,翼板并未改善方柱的涡激振动性能,反而不利于方柱的涡激振动;(2)翼板角部处理没有提高方柱的驰振临界风速,但减小了发生驰振的风向角工况,整体而言,翼板角部处理并没有改善方柱的驰振性能;(3)在全风向角范围内,带翼方柱观测到涡激振动、驰振耦合状态振动和非耦合状态振动,表明风向角是改变柱体驰振类型的一个重要因素。Square structures and components are widely used in engineering structures,and their wind-induced vibration problems become more prominent with the increase of its height and span.Corner treatment is a commonly used aerodynamic measure in square section structural engineering.In order to investigate the effect of wing corner treatment on the wind induced vibration performance of square cylinders in all wind directions,wind tunnel tests were conducted on some standard square cylinders and a wing corner treated square cylinder by using all wind direction section models.The vortex-induced vibration and galloping performance of the standard square cylinders and winged square cylinder in all wind directions were analyzed.The results show that:(1)The corner treatment with the wing plate reduces the wind direction range of vortex-induced vibration of the square cylinder,but the maximum amplitude of vortex-induced vibration and the wind speed locking range are significantly larger than those of the standard square cylinders.The wing plate does not improve the vortex-induced vibration performance of the square cylinder,but on the contrary is not conducive to the vortex-induced vibration of the square cylinder.(2)The treatment of wing plate corners does not increase the critical wind speed of galloping of the square cylinder,but reduces the wind direction angle conditions where galloping occurrs.Overall,the treatment of wing plate corners does not improve the galloping performance of the square cylinder.(3)In all wind directions,vortex-induced vibration and galloping coupled vibration as well as uncoupled vibration are observed in winged square cylinders,indicating that wind direction is an important factor in changing the type of galloping vibration of the cylinder.

关 键 词：标准方柱 带翼方柱 驰振 涡激振动 全风向角 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3