不同比例尺铁路桥箱梁风洞试验涡振对比  

Comparison of Vortex-induced Vibration in Wind Tunnel Test of Railway Box Girder with Different Model Scales

作　　者：王骑[1,2] 黄林 高贵[3] 李世文 宁伯伟 WANG Qi;HUANG Lin;GAO Gui;LI Shiwen;NING Bowei(Southwest Jiaotong University,Chengdu,Sichuan 610031,China;Key Laboratory for Wind Engineering of Sichuan Province,Chengdu,Sichuan 610031,China;Wuhan-Jiujiang Railway Passenger Dedicated Line Hubei Corporation Limited,Wuhan,Hubei 430201,China;China Railway Major Bridge Reconnaissance&Design Institute Co.Ltd,Wuhan,Hubei 430050,China)

机构地区：[1]西南交通大学,成都610031 [2]风工程四川省重点实验室,成都610031 [3]武九铁路客运专线湖北有限责任公司,武汉430201 [4]中铁大桥勘测设计院集团有限公司,武汉430050

出　　处：《铁道工程学报》2025年第1期64-68,76,共6页Journal of Railway Engineering Society

基　　金：中国铁路总公司科技研究开发计划重点课题(AJZH2020-001);国家重点研发计划项目(2022YFC3005304);四川省科技计划项目(2021YJ0030)。

摘　　要：研究目的:整体式钝体钢箱梁作为大跨度铁路桥近年来采用的一种主梁形式,涡激振动现象较为显著,为研究比例尺对铁路桥钝体箱梁节段模型涡振试验的影响,采用1∶90、1∶50与1∶25节段模型风洞试验,对比不同比例尺试验下铁路桥钝体箱梁断面的涡振响应,在此基础上分析研究铁路桥钝体箱梁节段模型风洞试验的适宜缩尺比。研究结论:(1)铁路桥钝体箱梁的涡激振动试验结果受模型比例尺影响较大,其中1∶50节段模型试验中获得的断面涡振响应最为显著,通过1∶25比例尺试验获得的断面涡振响应较小,但该两种比例尺模型的主要涡振特性试验结果大致吻合;(2)1∶90节段模型试验在各风攻角下均没有测试到断面的涡振响应,采用小尺度模型试验无法有效反映钝体箱梁铁路桥实桥的涡振特性;(3)在不考虑节段模型系统满足与实桥间质量与质量惯性矩相似律的条件下,可以在小尺度(1∶90比例尺)模型试验中获得铁路桥钝体箱梁断面的涡激振动,虽无法借此判定实际铁路桥梁的涡振响应,但可借此对比断面涡振性能的高低,在主梁设计阶段初期辅助完成气动优化措施的研究;(4)本研究成果可为大跨度铁路桥箱梁的风洞试验比例尺设定提供参考。Research purposes:The integral blunt box girder is one of the main girder forms of large-span railway bridges in recent years,and the vortex-induced vibration(VIV)phenomenon is quite significant.In order to study the effect of scale on the section model wind tunnel test for railway blunt box girder VIV response,the 1∶90,1∶50 and 1∶25 section model wind tunnel tests were used to compare the VIV response of railway blunt box girder under different scale tests.On this basis,the appropriate section model scale of railway blunt box girder was analyzed and studied.Research conclusions:(1)The railway blunt box girder VIV response test results are greatly affected by the model scale.The VIV response obtained in the 1∶50 section model test is the most significant,while the VIV response obtained in the 1∶25 section model test is relatively small.However,the main VIV characteristics test results of the two scale models are roughly consistent.(2)In the 1∶90 section model wind tunnel test,the section VIV response was not detected at each angle of wind attack.The small-scale model test cannot effectively reflect the railway blunt box girder VIV characteristics.(3)Without considering that the section model system satisfies the similar law of mass and mass moment of inertia to the real bridge,the railway blunt box girder VIV response can be obtained in the small-scale(1∶90 scale)model test.Although the VIV response of the actual railway bridge cannot be determined by this method,the VIV performance of the section can be compared by this method.At the initial stage of girder design,this method can assist in the study of aerodynamic optimization measures.(4)The results of this research can be used as a reference for setting the scale of wind tunnel tests for box girders of large-span railway bridges.

关 键 词：铁路桥钝体箱梁 涡激振动 风洞试验 模型比例尺 雷诺数 

分 类 号：U24[交通运输工程—道路与铁道工程]