雷暴冲击风荷载的大涡模拟
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摘要
雷暴冲击风具有同常规的大气边界层风完全不同的风场特征。为研究雷暴冲击风场中建筑物的风荷载,采用大涡模拟(LES)方法对方形截面高层建筑进行了雷暴冲击风场数值模拟,获得了高层建筑在雷暴冲击风作用下的风荷载参数。同时,对雷暴冲击风场进行了数值模拟,所得结果与理论结果吻合良好,验证了方法的可靠性。
Velocity profiles and characteristics in a thunderstorm downburst are significantly different from that of an atmospheric boundary layer wind.Large Eddy Simulation(LES) method is employed to investigate wind loads on high-rise building in a downburst.Drag and pressure coefficients are obtained by numerical simulation.In addition,the wind field of a downburst is studied,and the results are compared with the data obtained from empirical models.
Velocity profiles and characteristics in a thunderstorm downburst are significantly different from that of an atmospheric boundary layer wind.Large Eddy Simulation(LES) method is employed to investigate wind loads on high-rise building in a downburst.Drag and pressure coefficients are obtained by numerical simulation.In addition,the wind field of a downburst is studied,and the results are compared with the data obtained from empirical models.
引文
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[7]潘峰,孙炳楠,楼文娟,陈勇.冲击风作用下大跨屋盖多模态随机风致响应研究[J].空气动力学学报,2008,26(1):119-125.(PAN FENG,SUN BIN-NAN,LOUWEN-JUAN,CHEN YONG.Random wind-induced dy-namic response of long-span roof to thunderstorm down-bursts in the time domain[J].Acta Aerodynamica Sinica,2008,26(1):119-125.)
[8]赵杨,曹曙阳,Yukio Tamura,段忠东,S.Ozono.雷暴冲击风模拟及其荷载的风洞试验研究[J].振动与冲击,2009,28(4):1-5.(ZHAO YANG,CAO SHU-YANG,YUKION TAMURA,DUAN ZHONG-DONG,S.Ozono.Simulation of downburst and its loads with wind tunnel test[J].Journal ofvibration and shock,2009,28(4):1-5.)
[9]汤卓,吕令毅,李萍,郭俊东.高耸异型烟囱横风向气动参数CFD模拟[J].振动与冲击,2009,28(10):137-140.(TANG ZHUO,LU LING-YI,LI PING,GUO JUN-DONG.CFD simulation for across-wind aerodynamic pa-rameters of special-shaped tall shimney[J].Journal ofvi-bration and shock,2009,28(10):137-140.)
[10]Fluent.FLUENT User's Guide,Release 6.2[S].FluentInc.,Lebanon,NewHampshire,2005.
[2]HOLMES J D,OLIVER S E.An empirical model of a down-burst[J].Engineering Structures,2000,22:1167-1172.
[3]WOOD G S,KWOK K C S et al.Physical and numericalmodeling of thunderstorm downbursts[J].J.Wind Eng.Ind.Aerodyn.2001,89:535-552.
[4]SENGUPTA A,SARKER P P.Experimental measurementand numerical simulation of an impinging jetwith applicationto thunderstorm microburst winds[J].J.Wind Eng.Ind.Aerodyn.2008,96:345-365.
[5]MASONMS,etal.Numerical simulation of downburst winds[J].J.Wind Eng.Ind.Aerodyn.,2009,97:523-539.
[6]瞿伟廉,吉柏锋,李健群,王锦文.下击暴流风的数值仿真研究[J].地震工程与工程振动,2008,28(5):133-139.(QUWEI-LIAN,JI BAI-FENG,LI JIAN-QUN,WANG JIN-WEN.The study on numerical simulation ofdownburst wind[J].Journal ofearthquake engineering andengineering vibration,2008,28(5):133-139.)
[7]潘峰,孙炳楠,楼文娟,陈勇.冲击风作用下大跨屋盖多模态随机风致响应研究[J].空气动力学学报,2008,26(1):119-125.(PAN FENG,SUN BIN-NAN,LOUWEN-JUAN,CHEN YONG.Random wind-induced dy-namic response of long-span roof to thunderstorm down-bursts in the time domain[J].Acta Aerodynamica Sinica,2008,26(1):119-125.)
[8]赵杨,曹曙阳,Yukio Tamura,段忠东,S.Ozono.雷暴冲击风模拟及其荷载的风洞试验研究[J].振动与冲击,2009,28(4):1-5.(ZHAO YANG,CAO SHU-YANG,YUKION TAMURA,DUAN ZHONG-DONG,S.Ozono.Simulation of downburst and its loads with wind tunnel test[J].Journal ofvibration and shock,2009,28(4):1-5.)
[9]汤卓,吕令毅,李萍,郭俊东.高耸异型烟囱横风向气动参数CFD模拟[J].振动与冲击,2009,28(10):137-140.(TANG ZHUO,LU LING-YI,LI PING,GUO JUN-DONG.CFD simulation for across-wind aerodynamic pa-rameters of special-shaped tall shimney[J].Journal ofvi-bration and shock,2009,28(10):137-140.)
[10]Fluent.FLUENT User's Guide,Release 6.2[S].FluentInc.,Lebanon,NewHampshire,2005.
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