The Preliminary Study Based On The ANSYS Numerical Wind Tunnel Simulation

This dissertation is a part of the research project named "the Confirmation of the Wind Load to Complex Structure Form" which is supported by the design partment of China Jingye Engineering Technology Corporation Limited. The distributing of flow field around high-level inter-structure,the compressive Stress of structure surface and fliud-structure interation were studied in this dissertation based on theoretical method.Wind load is very sensitivity load to high-level inter-structure,and it is indispensable in the structure design.It becomes very important to measure the distribution of the wind pressure exactly on the surface of the buildings.At present,field measurement,wind tunnel test,theoretical analysis and numerical simulation are the four major methods to study the distribution of the wind pressure on the buildings.With the development of computational technology, numerical simulation plays a more and more important role in the wind engineering community.But there are many difficulties in the process of computing the high turbulent flow flied around the building being immersed in the lower atmosphere boundary layer. This article main research content is:(1) This article first selected the CAARC standard model to take the object of study, established to it has simulated the wind tunnel the three dimensional actual criterion computation model, use general finite element software ANSYS calculates it in the atmospheric boundary layer wind field distribution. The computation uses the rapids model is the standard model. Distinction establishment rigid model and elastic model. According to the rigid model's computation, obtains the structure surface wind pressure distributed situation, and the wind tunnel result which does with the Tongji University carries on the comparison. The analysis indicates the numerical calculus result basically with the wind tunnel test consistent.(2) Next based on the standard construction model circumferential flow numerical simulation result, the following work involves in the structure wind project the practical application question. This article has selected "the high-level civil construction steel structure technical schedule" a several kind of typical build high-rise construction. Uses the method of numerical simulation, has calculated their build coefficient, and carries on the comparison with the standard in value, puts forward the proposal to the engineering design. (3) Simulation of flexibility in the standard model, by the structure of the wind-induced dynamic coefficient and distributed pressure coefficient, with the rigid model and the results were compared on a solid-fluid interaction and the role of high-level inter-structure has a clear impact in the design should be folly taken into account.(4) Has simulated the Huhhot White Tower Airport newly built air station building structure under the actual environment wind field distribution, by the representative of several different wind direction of the wind pressure, wind speed map. Finally, the numerical simulation results and wind-tunnel test results were compared, analysis, summed up the roof of the distribution of pressure.We can see that the use of ANSYS numerical simulation results of wind tunnel test results and good agreement, be pressure on the roof for the distribution of wind design and computational fluid dynamics to provide a certain amount of reference.