Numerical Simulation Of Aerodynamic Performance Of Parallel Structures

With the development of national economy and the continuous improvement of structural analysis theory,in order to meet the needs of modern economic construction,more and more structures begin to be built in parallel.Because of the shielding effect of the upstream cylinder,the downstream cylinder presents a flow field characteristic that is obviously different from that of the upstream cylinder or the single cylinder.In this paper,the flow field distribution of parallel square column,cylinder and upper and lower column of hanging track beam column is studied.The following is the main work of this paper:1.This paper reviews the research status of parallel square,cylinder and parallel building and bridge,analyzes the main types of wind-induced vibration of parallel cylinder,and puts forward the research idea of this paper2.The three governing equations used in numerical simulation are introduced in detail,and the turbulence numerical simulation methods commonly used in numerical simulation are expounded.3.The calculation and analysis of three-dimensional single cylinder were carried out,and the simulation results were compared with the wind tunnel and the numerical simulation literature,which verified the correctness of mesh generation and parameter setting in the numerical simulation in this paper.4.Through the numerical simulation of parallel square columns and cylinders,it is found that in the case of small spacing,there is a large aerodynamic interference between the upper and lower square and cylinder,and there is a critical spacing ratio,and the influence on the downstream cylinder is greater than that on the upstream cylinder.5.According to the numerical simulation analysis of the parallel hanging track beam,it is found that the lateral wind pressure of the upper and lower columns is less than the wind pressure of a single column.Meanwhile,it is found that there is also a critical spacing ratio in the parallel hanging track beam,and there will be obviously different flow field distribution rules in the adjacent columns of the critical spacing ratio.