Teaching value wind tunnel;  large span closed roofs;  average wind pressure;  Turbulence physics model;  Cone vortex

In order to verify the feasibility of numerical simulation in the application of average wind pressure of large-span closed roof, the average wind load of the comprehensive gymnasium of Shenyang Olympic Sports Center was analyzed by numerical simulation method, and the total lift and average wind pressure distribution of different wind downwards on the roof were obtained. The regularity of total lift with wind direction was analyzed, and the average wind pressure distribution was compared with the wind tunnel test results. It can be seen that the results of the two methods on the roof with eaves on three sides are similar, indicating that the numerical simulation method is feasible to simulate the average wind pressure distribution of the closed large span roof. By comparing the cantilevered edge and the circular arc edge, it can be seen that the SST K-w turbulent flow physical model has good accuracy in calculating the flow field dominated by separated flow. Finally, the characteristics of the distribution of cones on different forms of eaves roofs are studied.