Research On Mechanical Performance Analysis And Design Optimization Of Elevated Steel Plate Silo

With the development of society, elevated steel silo has been used in many industries, such as agriculture, mining, mineral processing, chemical industry, shipbuilding and so on. Elevated steel silo has been mainly used for the storage and processing of bulk solid materials. Aiming at the problem of silo, there are a lot of experiments and theoretical studies have been carried out at home and abroad, and a series of research results and theories have been obtained. Failure of the silo is destructive, because most of the partial destruction of the silo usually leads to catastrophic failure of the entire silo, resulting in huge economic losses and even loss of life. The specification of the steel silo is mainly referred to the European norms, and the related theories of the elevated steel plate lag behind the practical application, there is a certain gap. In view of this contradiction, this paper researches the mechanical properties and designs optimization of the elevated steel silo.This paper firstly has regarded the elevated steel silo as the research background. According to the specification and related theory, the theoretical analysis and calculation are carried out, and the weight, load, wind load and earthquake action are calculated, and checking the strength and stability of the silo that safety meet the requirements. The finite element software ANSYS is used to build the model, which is applied to the load, material load, wind load and earthquake action. The static analysis of the structure is carried out and compared with the standard calculation. The result of the static analysis and the theoretical calculation error is less than 10%, and the accuracy of the finite element calculation is determined. The calculation method of the silo structure is very complicated, but the use of the finite element software greatly simplifies the design process and provides an intuitive way to determine the weak region of the silo structure. Then, using the finite element analysis, the dynamic and stability of steel silos are studied, and the weak parts and ultimate bearing capacity of the steel silo under earthquake are determined.Then, this paper establishes the finite element model of the overhead type corrugated steel plate silo, and studies the mechanical properties of the model by applying the weight, material load, wind load and earthquake action. Compared with the flat steel silo, in the strength, the strength of the cylinder wall of corrugated steel silo increased by an average of 40.6%, the strength of the funnel section increased by 7.7%, and the strength of the support column increased by 7%. Under the full load of storage material, the buckling load coefficient of corrugated steel silo is increased by 25%,however after the addition of ribs only increased by 0.36%; corrugated steel silos of ultimate bearing capacity is improved 33.3%, and stiffening corrugated steel silos of limit bearing capacity which are relative to the flat steel silos is improved 41.6%.Stiffening corrugated steel silos of limit bearing capacity with respecting to the corrugated steel silos is increased by the 6.25%, the increase rate is relatively small.Relative to flat steel tube wall, the load capacity and ductility of the corrugated tube are increased greatly, but the increase is relatively small. Therefore, considering the mechanical properties, the economy and the convenient construction, it is reasonable to use corrugated board in the steel silo wall.