• 首页 | 期刊简介 | 编委会 | 投稿须知 | 出版道德规范 | 下载专区 | English
毛禹,李春光,韩艳*,王雷,梁爱鸿,颜虎斌.双幅钝体钢箱梁间距对涡振性能的影响及其机理研究[J].实验力学,2022,37(6):889~899
双幅钝体钢箱梁间距对涡振性能的影响及其机理研究
Study on the mechanism of the influence of spacing on vortex-induced vibration of double bluff body steel box girders
投稿时间:2021-09-05  修订日期:2021-10-28
DOI:10.7520/1001-4888-21-204
中文关键词:  涡振性能  风洞试验  双幅钢箱梁  间距  表面压力
英文关键词:vortex vibration performance  wind tunnel test  twin box bridge  space  surface pressure
基金项目:国家自然科学优秀青年基金项目(51822803);国家自然科学基金项目(51978087);长沙理工大学桥梁工程安全控制教育部重点实验室开放基金项目(18ZDXK09)
作者单位
毛禹 长沙理工大学 土木工程学院, 湖南长沙 410114 
李春光 长沙理工大学 土木工程学院, 湖南长沙 410114 
韩艳* 长沙理工大学 土木工程学院, 湖南长沙 410114 
王雷 广东省交通规划设计研究院, 广东广州 510000 
梁爱鸿 长沙理工大学 土木工程学院, 湖南长沙 410114 
颜虎斌 长沙理工大学 土木工程学院, 湖南长沙 410114 
摘要点击次数: 364
全文下载次数: 72
中文摘要:
      为研究双幅钝体钢箱梁桥梁涡激振动性能及其振动机理,进行了节段模型风洞试验。通过测振测压试验获取了模型涡振位移响应和表面各测点压力时程数据,并对比分析了间距从0.5m到3.0m每0.5m变化下箱梁表面测点脉动压力系数均值、均方差以及局部气动力与总体气动力的相关性和贡献系数。研究结果表明:节段模型在±3°、0°攻角均发生竖弯涡激振动,-3°攻角为最不利攻角。间距的变化引起箱梁表面及梁底的脉动压力差异化,间距超过2m时变化显著;双幅钝体钢箱梁间距存在一个涡振性能最优值,间距为1.5m时,双幅箱梁涡激振动虽未被彻底抑制,但涡振幅值大幅降低,在此间距下,上下游箱梁在桥面区域以及梁底区域表面压力脉动大幅削弱,降低了局部气动力与总体气动力的相关性,从而削弱了涡振幅值。
英文摘要:
      In order to study the vortex induced vibration (VIV) performance and vibration mechanism of double amplitude bluff body steel box girder bridge, wind tunnel test of segmental model was carried out. The displacement response of vortex vibration and the time history data of pressure at each measuring point on the surface were obtained through the vibration and pressure measurement test. Taking a working condition every 0.5m, the mean value and standard deviation of the fluctuating pressure coefficient of the measuring points on the box girder surface with a spacing of 0.5m to 3m, as well as the correlation and contribution coefficient of local aerodynamic force and overall aerodynamic force are compared and analyzed. The results show that: Vertical bending vortex-induced vibration occurs at the Angle of attack of ±3° and 0°, and the Angle of attack of -3 is the most unfavorable Angle. The variation of spacing causes the difference of pulsating pressure on the surface and bottom of the box girder, and the variation is significant when the spacing is more than 2m. There is an optimal value of vortex vibration performance of the double amplitude bluff body steel box girder bridge. When the spacing is 1.5m, the vortex vibration of the double bluff body steel box girder is not completely suppressed, but amplitude of vortex-induced vibration is greatly reduced. Under this interval, the pressure pulsation of the upper and lower box girders in the deck area and the bottom area of the girder is greatly weakened, which destroys the correlation between the local aerodynamic force and the overall aerodynamic force, thus amplitude of vortex-induced vibration is reduced.
查看全文  下载PDF阅读器
关闭

版权所有:《实验力学》编辑部
您是本站第 65193415 位访问者,今日一共访问683次,当前在线人数: 0
技术支持:本系统由北京勤云科技发展有限公司设计