第39卷第1期2023年2月结构工程师StructuralEngineersVol.39,No.1Feb.2023风嘴对流线形钢箱梁涡振性能影响试验和CFD研究康福军1郭峰1王俊2,*李加武2(1.广东省佛山市顺德区工程建设中心,佛山528300;2.长安大学公路学院,西安710064)摘要为了研究风嘴对流线形钢箱梁涡振性能的影响,以顺德斜拉桥为工程背景,通过节段模型测振风洞试验研究流线形钢箱梁涡振性能,研究发现:原设计断面在成桥状态出现超过规范限值的竖弯涡振和扭转涡振;为提高风洞模型试验效率,首先采用CFD的方法分析了62°、50°和40°风嘴对断面流场特性的影响,结果表明小角度风嘴可以进一步强化断面流线形、降低迎风侧的负压力并改变断面漩涡的规模和位置。随后通过主梁节段模型风洞试验验证了40°风嘴的气动优化措施能较好地消减涡振,该研究可为流线形钢箱梁涡振性能研究提供参考。关键词桥梁工程,流线形钢箱梁,涡振,风洞试验,CFD,风嘴WindFairingEffectonVortex-InducedVibrationofStreamlineSteelBoxDeckbyWindTunnelTestandCFDKANGFujun1GUOFeng1WANGJun2,*LIJiawu2(1.ShundeEngineeringConstructionCenter,Foshan528300,China;2.SchoolofHighway,Chang’anUniversity,Xi’an710064,China)AbstractInordertostudywindfairingeffectonthevortex-inducedvibration(VIV)ofstreamlinesteelboxdeck,takingShundecable-stayedbridgeofunequalpylonsasengineeringbackground,theVIVperformanceofthestreamlinesteelboxgirderwasstudiedbythemethodofsegmentalmodelwindtunneltest.Itwasfoundthattheverticalbendingvortexvibrationandtorsionalvortexvibrationoftheoriginaldesignsectionexceededthelimitduringtheserviceperiod.Inordertoimprovetheefficiencyofwindtunnelmodeltests,firstly,theCFDmethodisusedtoanalyzetheinfluenceof62°,50°,40°windfairingontheflowfieldcharacteristicsofthesection,andthesmallerwindfairingmakesthesectionstreamlinemoreobvious,reducesthenegativepressureatthewindward,andchangesthescaleandpositionofthevortexonthebridgedeck.Then,thewindtunneltestresultsverifythattheaerodynamicoptimizationmeasureof40°canreducetheamplitudeofVIVbetter.ThisstudycanprovidereferencefortheresearchofVIVperformanceofstreamlinesteelboxgirder.Keywordsbridgeengineering,streamlinesteelboxdeck,vor...