Finite-element Analysis And Improved Design For Column Section Of Shelf In Stereoscopic Warehouse

The thesis is based on the horizontal research topic cooperated with a company. In the theise, structural statics analysis and section improved design are carried out for 90 series shelf system of the company, the bearing capacity and stability of the shelf and columns should be analyzed; the ultimate objective of analysis and design is to improve the design of column section and material of the shelf to reduce the weight and material consumption in the premise of meeting the bearing capacity.(1) Finite element method, using the ABAQUS software, X-shaped support with K-type shelf support two structures were static structural analysis, can use additional section properties and material properties of three-dimensional wire shelf unit established finite element model, through scientific reasonable modeling to ensure the reasonableness of calculated results.(2) We can know from the analysis of key part’s shelf by stress, strain analysis of its strength and stiffness of a security assessment. Based on "cold-formed steel technical specifications", was calculated by carrying shelf stability. On the shelf finite element stress and strain analysis showed that the effect of the force shelf post offices and other foot maximum equivalent stress in the axial stress accounted for the major part, a very small bending stress, axial stress of 1-3%, the shear stress is almost zero; the top shelf column maximum lateral deflection, two structures in the beams and diagonals are less stress and strain. Stability analysis of the Rack column indicates, Q235 stable carrying capacity is close to its critical force, the stability bearing capacity Q345 reached only 50%of its critical force, the difference of the two materials is about 5%, instead of using the Q345 Q235 available higher price.(3) Using Optimized design methods, optimal objective function is derived by deriving the formula of critical force of column axial compression, with the cross section of each column size constraints, the minimum cross-sectional area of the column in order to optimize the goal to achieve a cross-section of the shelf column Improved Design. The result indicates, before the improved column cross-sectional area than the improvement to decrease by about 12%, and achieved good weight loss results.Results of this thesis as a reference value for the structural design and material selection shelves.