Finite Element Analysis And Optimization Of Working Device Structure Of Telescopic Aerial Vehicle

As a special engineering vehicle of modern advanced mechanical equipment,aerial work vehicle is a special machine that can transport workers and working tools and equipment to the predetermined position,so as to complete a series of aerial work tasks such as installation and maintenance.Therefore,its safety performance requirements are very high.In this paper,a telescopic aerial vehicle is taken as the research object,and the structure of the working device is analyzed and optimized.According to the geometric structure characteristics of the telescopic boom,the parametric finite element model of each part of the aerial work vehicle is established by using the finite element analysis software ANSYS.According to the function of each component and the connection relationship between them,the finite element model of aerial work vehicle is established.According to the geometric structure and force characteristics of luffing mechanism,the calculation formula of the force on each hinge point is deduced,and the theoretical calculation of the force on each hinge point is compared with the finite element calculation results,which verifies that the establishment of the finite element model and the application of boundary conditions are correct.Considering the influence of the contact between the telescopic booms,the mechanical properties of the working device under typical working conditions are analyzed by finite element method.The analysis results show that the stress in most areas of the working device is less than the allowable stress,and only the stress of the turntable,basic arm and one extension arm exceeds the allowable stress,which does not meet the use requirements,so the structure optimization should be carried out.Aiming at the problem that the local stress of the working device exceeds the allowable stress,the structure of the turntable is improved by welding the stiffener plate and adding the cover plate;The structure of the basic arm is optimized by the way of arm body plate and corner plate;The structure of a boom is optimized by installing a bending slider instead of a flat slider.The proposed optimization scheme improves the structural mechanical performance and safety performance of the working device of the aerial work vehicle.