Numerical simulation of wind load on canopy of cantilever stadium
The CFD numerical simulation of the surface wind load characteristics of cantilever stadium canopy is carried out by using the Realizable k-ε turbulence model,and the influence of the surface wind direction angle of stadium canopy on the distribution of net wind pressure coefficient,shape coefficient and average wind pressure coefficient is investigated in detail,which provides a basis for the design value of wind load on the structure surface.The calculation results show that the upper surface of the stadium canopy is mainly affected by wind suction,and the wind pressure coefficient fluctuates greatly in the front eaves and two corners of the canopy.For example,at the 180°wind direction angle,the wind pressure coefficient in the two corners of the canopy is between-0.5 and-3.5.Due to the need of structural modeling,the protruding rib on the top of the canopy has a great impact on the wind load.The reason is that a small vortex is formed behind the protruding rib on the top,and the wind pressure coefficient changes violently;When the wind direction is 90°,the wind pressure coefficient behind the first rib on the windward side of the incoming flow is between-1.5 and 1.1.The phenomenon of"upward suction and downward pressure"appears on the upper and lower surfaces of the canopy structure in the wind direction of 180°,the canopy is subjected to upward lifting force.
NETL
NSTL
万方数据
