Finite Element Analysis And Optimization Design For QY20 Truck Crane Boom

Crane is an indispensable equipment to achieve the mechanization, automation of production process, and to improve labor productivity. It plays an important role for the development of national economy and meeting people's material and cultural needs. With the rapid development of economic construction, the constant improvement of mechanization and automation, the crane technology is developing rapidly, and product variety is also increasing. Truck crane is widely used in our lives due to its flexible transition and convenient use. Crane boom as the core component is the main force member to carry the load. Whether the boom design is reasonable has a major impact on the lifting performance, so it has been the design focus in the crane technology research and development. In order to meet the safety and stability and economic requirements, it is necessary to do accurate static analysis and dynamic analysis for boom structure. Optimizing the boom structure can improve performance and reduce the cost.This paper introduces the development status of the truck crane at home and abroad, and summarizes the development direction of the truck crane. The force analysis for the boom structure is carried out according to the crane design specifications and related knowledge of mechanics.Taking QY20 truck crane boom as the main study object, three-dimensional model of the boom is set up for the preparation of FEA by the use of SolidWorks. The result of strength and stiffness analysis on the boom by Static Structural in ANSYS workbench shows that the maximum stress exceeds the allowable stress of the material in the hinge point of the first boom, and the maximum stress of the third and forth boom is much smaller than the allowable stress. The result of stability analysis on the boom by Linear Buckling shows linear buckling mode and load factor under different conditions, and that the buckling phenomenon occurs much easily in the hinge point of the first boom. The result of modal analysis on the boom by Modal shows the first six mode shapes and frequencies, which provide a theoretical basis for the boom resonance analysis.This paper carries out structure optimization and actual stress measurement of the boom under three typical working conditions with the method of FEA and stress test respectively. The comparison of FEA result and the measured data shows that FEA result coincides with the measured data. Thus, the finite element analysis is a reliable and economic basis to optimize the boom structure due to its accuracy, and has a broad application prospect.