Numerical Simulation of Wind Pressure Distribution in Canopy of Qilihe Stadium
Based on ANSYS-CFX 19.0 software platform and Lanzhou Qilihe Stadium as the engineering background,this paper uses SST k-ω turbulence model to numerically simulate the surface wind pressure distribution characteristics under 12 wind angles of the stadium canopy,and analyzes the influence of wind angles and surrounding buildings on wind pressure distribution.The distribution law of the wind pressure on the surface of the canopy is obtained,and the characteristics of the flow field around the canopy are discussed.Finally,according to the structure of the canopy and the characteristics of wind pressure distribution,the zonal wind pressure coefficient of the canopy surface under the most unfavorable wind direction and the calculation method of the design wind load of the canopy are given.The results show that the wind field and surface wind pressure around the center of the stadium are obviously affected by the surrounding disturbance buildings,and the numerical simulation results are consistent with the law of the flow around the blunt body.Wind direction has a great influence on wind load.The separation of incoming flow and vortex shedding are different under different wind direction.The maximum negative wind pressure zone appears at the leading-edge corner of the roof along the wind direction,and the positive pressure zone appears at the front end of the roof facing the wind direction.The simulation results can be used in practical projects.
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