Numerical Simulation Of Wind Pressure And Wind Vibration Response Analysis Of Plate-cone Reticulated Shell Structure

Plate-cone reticulated shell structure refers to a new type of space structure which is formed by replacing the web members of the double-layer reticulated shell with plate-cone elements composed of plates and integrates bearing,enclosure and decoration.At present,research on the structure mainly focuses on the static performance and its analysis method,seismic performance and stable ultimate bearing capacity.There are few studies on wind resistance of plate-cone reticulated shells,especially for plate-cone spherical reticulated shells,which are not suitable for the engineering application of plate-cone reticulated shells.Based on the research status of plate-cone reticulated shells,the following work has been carried out in this paper:Firstly,based on the linear filtering technology,the wind speed time-history program of three-dimensional space points considering the temporal and spatial correlation is obtained by MATLAB programming language.The wind speed time-history curve samples of several points of the plate-cone reticulated shell structure are obtained by computer numerical simulation,and the power spectrum obtained by simulation is compared with the target spectrum to verify the correctness of the self-compiled program and the reliability of the simulation results.Secondly,based on the computational fluid dynamics(CFD)theory,on the basis of in-depth research on the problems involved in the numerical wind tunnel size determination,grid division,boundary condition selection,turbulence model selection and solution parameter setting during the numerical simulation of wind field around the structure,the ANSYS CFX software platform is used to carry out the numerical wind tunnel simulation of an example,and the calculation results are compared with the literature results to verify the reliability of the numerical simulation.Then,the Realizable k-? turbulence model is used to carry out numerical wind tunnel simulation on Kewitt and geodesic plate-cone reticulated shells.Wind pressure distribution and flow characteristics of the structures under various wind directions are analyzed,and the wind pressure shape coefficient of the structures is calculated.Finally,according to the time-history analysis method,the wind-induced vibration responses of two types of spherical panel cone reticulated shell structures are calculated by using the general finite element analysis software ANSYS,and the response statistical characteristics are obtained through statistical analysis,and the effects of mean square deviation of structural responses and wind-induced vibration coefficients with different wind loads and rise-span ratios are compared and analyzed.At the same time,consistent wind vibration coefficient is introduced for the convenience of engineering design by taking values of wind vibration coefficient.