水平和竖向间距对双矩形断面涡振性能的影响  

Effects of horizontal and vertical distances on vortex-induced vibration of twin rectangular cylinders

作　　者：周志勇[1] 马凯 胡传新 袁万城[1] ZHOU Zhiyong;MA Kai;HU Chuanxin;YUAN Wancheng(State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China;School of Architecture Economics and Management, Shanghai Urban Construction Vocational College, Shanghai 200438, China;School of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]上海城建职业学院建筑经济与管理学院,上海200438 [3]武汉科技大学城市建设学院,湖北武汉430065

出　　处：《哈尔滨工程大学学报》2021年第4期505-513,共9页Journal of Harbin Engineering University

基　　金：国家重点研发计划(2019YFE0112300);土木工程防灾国家重点实验室基金项目(SLDRCE19-B-19);国家自然科学基金项目(51778471,51978512);山东省交通运输科技计划(2017B75).

摘　　要：为了研究双矩形断面间显著的气动干扰问题,本文开展了一系列节段模型风洞试验,研究了宽高比为5∶1的双矩形断面的涡振性能。采用动态测振和测压试验技术,从涡振响应及平均和脉动风压系数分布2个方面系统研究了水平和竖向间距对双矩形断面涡振响应的影响,得出不同间距影响的规律。结果表明:小水平间距下双矩形断面的竖弯涡振响应较大;而水平间距比为1.2时上、下游断面的扭转涡振响应较为不利。竖向间距比为±2.0时存在1个扭转涡振区,其他竖向间距出现了2个扭转涡振区。不同水平间距下平均和脉动风压系数分布类似;不同竖向间距下脉动风压系数沿下游断面上表面的分布差别较大。To investigate the significant aerodynamic interference between twin rectangular cylinders,a series of section model wind tunnel tests were carried out to investigate the vortex-induced vibration(VIV)behavior of twin rectangular cylinders with an aspect ratio of 5∶1 in this study,by a combination of the test technique of vibration measurement and pressure measurement.The analysis was performed based on VIV responses and the mean and fluctuating wind pressure coefficient distributions,obtaining the general conclusions of the influence of horizontal and vertical intervals between the twin rectangular cylinders.The results indicate that generally,the heaving VIV responses are larger for smaller horizontal distances.However,the torsional VIV responses of both cylinders are unfavorable for the horizontal distance ratio of 1.2.There is only one VIV lock-in region in both cylinders for the vertical distance ratios of±2.0,while two lock-in regions occur in both cylinders for other vertical distance ratios.The mean and fluctuating pressure coefficient distributions are similar for different horizontal distances.However,there is a significant difference between the fluctuating pressure coefficient distributions for various vertical distances.

关 键 词：风洞试验 涡激振动 双矩形断面 水平间距 竖向间距 测振试验 测压试验 涡振响应 风压系数分布 

分 类 号：TU311.3[建筑科学—结构工程] U441.3[建筑科学—桥梁与隧道工程]