IEC阵风作用下箱梁断面的气动特性分析  

Aerodynamic Characteristic Analysis of Box Girder Section in IEC Gusty Wind

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作  者:黄林 黄菲 周俊吉 董勤喜 HUANG Lin;HUANG Fei;ZHOU Junji;DONG Qinxi(School of Civil Engineering,Architecture and Environment Xihua University,Chengdu 610039 China;Edu Science Research Institute,Kawasaki City 214-0033 Japan)

机构地区:[1]西华大学土木建筑与环境学院,四川成都610039 [2]教育科学研究所,日本川崎市214-0033

出  处:《西华大学学报(自然科学版)》2020年第1期41-47,共7页Journal of Xihua University:Natural Science Edition

基  金:四川省教育厅重点项目(17ZA0367);教育部春晖计划项目(191632);西华大学校重点项目(Z1520610)

摘  要:基于二维非定常不可压缩雷诺平均N-S方程和RNGE-e湍流模型,采用CFD(computational fluid dynamics)方法对箱梁断面在IEC(international electrotechnical commission)阵风以-5。^+5。攻角作用下的气动力及流场特性进行数值模拟分析,获得了IEC阵风作用过程中箱梁断面的三分力系数的总体变化特征、入口边界静压变化特性及流场内静压的顺压和逆压特性等。分析表明,IEC阵风模型比TSI(technical specifications for interoperability)阵风模型更适于桥梁气动力的数值模拟分析。The aerodynamic forces on the box girder section and flow field are simulated by CFD(computational fluid dynamics)method in IEC(international electrotechnical commission)gusty wind at the angles of attack from一5°to+5°.Reynolds-averaged Navier-Stokes(RANS)equations for 2D incompressible unsteady flow are integrated with RNG(renormalized group)k-E turbulence model in this research.The general characteristics of the static aerodynamic forces on the box girder section in the IEC gusty wind,the characteristics of the static pressure at the inlet boundary,and the favorable and adverse pressure gradients in the flow field are obtained.The analysis shows that the IEC gust model is more suitable for numerical simulation of aerodynamics forces on bridge than TSI(technical specifications for interoperability)gust model.

关 键 词:IEC阵风 箱梁断面 数值模拟 气动特性 

分 类 号:U488.21[交通运输工程—载运工具运用工程] O35[交通运输工程—道路与铁道工程]

 

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