Design And Development Of Interface Between STADS Software And FLUENT Wind Pressure Calculation Software

The wind disaster is one of the main natural disasters suffered by the engineering structure,and the wind resistance research of the engineering structure plays a vital role in ensuring the safety of the project.In the past,wind resistance research of engineering structures was mainly completed by wind tunnel tests,but the cost was high and the period was long.Numerical wind tunnels have the advantages of low cost,short cycle and high efficiency,and are not affected by model scale.They are gradually becoming a powerful tool to replace traditional wind tunnel tests.STADS software is an auxiliary design program for spatial grid structure,and ANSYS FLUENT is a general fluid calculation software.The program is written in C ++ language,the interface between STADS and FLUENT is established,and the wind pressure numerical simulation calculation function of STADS software is developed,so that the wind pressure distribution on the surface can be studied for the spatial structure of different body types,and calculation results such as figure coefficients can be obtained.And apply this program to the actual project.The specific research work is as follows:(1)Develop the interface program of STADS software and FLUENT.Using Microsoft's basic class library,using Visual Studio 2010 platform to establish a program framework,using C ++ language to write programs,established the interface between STADS and ICEM,STADS and FLUENT.Therefore,the model can be automatically transferred to the pre-processing software ICEM,and the wind pressure calculation result of the FLUENT software can be automatically read according to the node number of the structure to avoid the uncertainty caused by a large amount of data processing.Compared with traditional numerical simulation,this program can realize automatic calculation and data extraction of wind pressure,with high calculation efficiency.It has good applicability to the space structure of different body types and can meet engineering applications.(2)Taking a cylindrical reticulated coal shed in Hohhot as the engineering background,with the help of the STADS-FLUENT program,the steady RNG turbulence model in the Reynolds average method is used to analyze the distribution of the surface and surrounding flow field,and the calculation results of the shape factor are obtained.By comparing with the wind tunnel test data,the trend of the two is the same,and the maximum error and the average error are within the acceptable range,which verifies the feasibility and correctness of the STADS-FLUENT program for numerical simulation of wind pressure.(3)Engineering application of STADS-FLUENT system.Entrusted by Suzhou Suwang Construction Engineering Co.,Ltd.,a numerical wind tunnel simulation calculation study was performed on the closed grid of the coal yard of Xuzhou China Resources Power Co.,Ltd.using the STADS-FLUENT system.Through CFD numerical simulation calculations,the calculation results of the three-dimensional wind speed distribution around the grid structure and the wind pressure distribution on the surface of the grid structure under various working conditions were obtained.According to the shape of the building,the wind pressure calculation results of the grid roof are integrated,and the surface of the grid structure is divided into different wind resistance design blocks,and the block shape coefficient map of the grid structure under each calculated wind direction angle is provided.It is used for the overall wind resistance design of the grid structure.