Finite Element Analysis And Fluid-structure Coupling Analysis Of Steel Silo Structure

The steel plate silo is a typical thin shell structure,which has the advantages of low construction cost,short construction period,small occupation area,light weight and large reserves,etc.It has been developed rapidly and widely used at home and abroad,and can be used for storing bulk materials such as grain,oil and cement.In recent years,in order to further improve the economic benefits of steel silos,steel silos develop towards large diameter and higher,which leads to steel silos more sensitive to wind load;Extreme weather such as typhoon also put forward higher requirements for the stability of steel silos.Due to the great economic loss and environmental impact caused by the wind damage accident of steel silos,the research on the effect of wind load on steel silos is importance.However,the wind load of steel silo is mainly considered by equivalent static load at home and abroad,especially the fluid-structure coupling effect between wind load and structure is lacking.The fluid-structure coupling analysis method can more accurately reflect the effect between the steel silo and the wind,and reflect the actual state of the silo under the wind load.Therefore,the analysis of the fluid-structure coupling characteristics between wind and steel silos has certain practical value and theoretical significance.In this paper,ANSYS software is used to obtain the structural model of the steel silo,and the stress and displacement of the steel silo in the case of static wind are studied.The measured displacement is in good agreement with the calculated results,so the finite element analysis results can be considered to be reliable.According to the ultimate design of bearing capacity,the results of stress and displacement are less than the allowable value of material,indicating that the steel silo structure is safe,and the structure design is reasonable.Secondly,based on the Fluent platform,Realizable k-ε turbulence model was used to result the three-dimensional numerical analysis of the wind field around the steel silo.The flow pattern of the wind field,the wind pressure distribution pattern on the surface of the steel silo,and the wind load shape coefficient of the top and wall of the steel silo were obtained,which provided a basis for the study on the fluid-structure coupling effect of the wind load on the steel silo.At the end,based on the Workbench platform,a one-way fluid-solid coupling framework was established.Three typical working conditions were selected to carry out the coupling analysis of wind load under different grain storage heights,and the force and deformation rules of steel silo under different working conditions were obtained.From the view of structural design and engineering management,the related measures to avoid wind damage of steel silo are given,which can provide a basis for the study of the fluid-structure coupling effect of wind load on steel silos.