Finite Element Analysis Of Aerial Work Platform And Optimization Of It’s Luffing Mechanism Hinge Positions

Aerial work platform is a kind of engineering machinery equipment, which used to transport workers, tools and materials to the specified location for working, and its chassis is finalizing road vehicles. It mainly includes a working platform with controller, stretching structure and vehicle chassis. Along with our country’s modernization construction of the highway, aerial work platform has higher utilization rate when working on high overhead. In order to improve the standard of design and the performance of the aerial work platform, a telescopic boom aerial work platform was researched by modern design theory and method.First, optimized mathematical model of the hinge positions of the luffing mechanism was established. The objective function of the optimization is to minimize the maximum cylinder force and force fluctuation were optimized. Selecting the appropriate design variables and constraints to optimize by 1STOPT optimization analysis software package. After the optimization, the above two results were improved effectively. Second, the structure and working principles of each part of the aerial work platform were introduced detailedly, parts of main metal structures were anslyzed theoretically, including strength and stiffness analysis of working boom, stress analysis of synchronous telescopic mechanism and calculation of reaction force of each leg. Next, parametric three-dimensional finite element model of the aerial work platform was established using ANSYS Parametric Design Language. Static analysis of two dangerous working conditions when operating behind was carried out. The detailed stress distribution and deformation of all parts of the aerial work platform can be obtained. Strength and stiffness analysis results of working boom, force of synchronous telescopic mechanism and reaction force of each leg were extracted from the analysis results and compared with results of theoretical analysis. The accuracy of the finite element simulation was verified. Finally, natural frequencies of the structure were derived from modal analysis of the whole machine model. Then, the maximum buckling load were obtained and stability of the structure was verified by buckling analysis of the upper part machine model.The results of this paper has been used in actual production. They direct the product design, shorten it’s design cycle, reduce it’s development costs and provide reference for the development and design of the same type of products.