The Design And Analysis For40m Height Stack Crane With Single Mast

Stacker crane is a key equipment in automated warehouse. By the rapid development ofthe goods demand, also land resources becoming tense situation in recent years, the demandof height of more than30m, up to40m high warehouse emerged. Therefore, it has greatsignificance to design and develop the stacker crane with height of40m. It should have betterdynamic performance and efficiency to meet the requirements of large height large capacitywarehouse, also to achieve rapid input and output cycles for warehouse.This article will be based on the requirements and principles of FEM standard created byEuropean Association for mechanical handling, to use the theory of mechanics of materialsto achieve the requirements of moment of inertia for mast structure, bottom structure andlifting carriage structure, then combined with the Chinese steel materials, to complete theprimary design of stacker crane structure.By classical mechanics-related formulas and finite element analysis module of Inventor,the natural frequencies of structure were calculated, and the static stress of the wholestructure was achieved. The results show the static stress safety factor in more than eighttimes; the stacker structure first natural frequency is0.957Hz by theoretical calculation, alsoInventor to calculate the first natural frequency is0.97Hz which is very close to theoreticalcalculation. It is a feasible method to use Inventor and to achieve eight natural frequenciesand mode shapes of stacker crane by this method.There are three typical of the stacker operating situations: acceleration and deceleration,emergency braking and collision buffers. The balanced system of inertial force for the threesituations are established. Then the stress of total structure was calculated by Inventor finiteelement analysis module for three situations. The fatigue analysis results show that thestacker with40m high structure is able to meet the15years level for the life requirementsof E8based on stress in acceleration and deceleration.Finally, we discuss how to increase dynamic performance of stacker crane. The methodsare carried out to reduce the ribs and webs quality while increasing the cross-sectionaldimension of mast to get a larger cross-sectional moment of inertia. The results show that the first frequency of the total structure could be increased from0.95Hz to1.01Hz, to satisfythe requirements of dynamic rigidity of stacker crane which requests the first frequencyshould be greater than1Hz.The research has benefit for the design and application of stacker crane which height isgreater than30m.