Optimization Design And Finite Element Analysis On The Frame Of The TLD110 Wide-body Trucks

Wide-body dump truck is a transport vehicle for highway construction,mining,building construction and other field operations.Its working conditions are very bad.It not only bears the weight of packing box,cargo,dump truck chassis and various power assemblies,but also bears all kinds of forces and torques produced by the Wide-body dump truck in the course of driving,loading and unloading.The reliability of the Wide-body dump truck not only determines whether the dump truck can work properly,but also affects the driving safety of the dump truck.Therefore,it is necessary to study the frame structure of wide-body dump truck,which is of great significance.In this paper,the frame of TLD110 Wide-body dump truck is taken as the research object.Firstly,the geometric model of the frame is established by using the three-dimensional modeling software Pro/E,and then the finite element model of the frame based on the shell element is established in the finite element software Hypermesh.The static strength and stiffness of the frame under four typical conditions of full load bending,full load torsion,emergency braking and emergency turning are analyzed in software OptiStruct.The stress and deformation distribution of the frame under various working conditions is obtained,and the dangerous area of the frame structure is determined.Then the Dynamic stress measurement test of the frame stress is carried out under the mining road condition.The measured values of each measuring point are in good agreement with the simulated values,and the error between them is less than 15%,which verifies the correctness of the finite element model and the analytical method.According to the range of excitatio n frequency which the frame may bear in the actual working process,the free mode analysis of the frame structure is carried out by selecting 1-110 Hz as the calculating frequency.The first 12 order natural frequencies and vibration patterns of the frame are obtained,and the vibration characteristics of the frame are evaluated.At last taking the minimum total mass of the frame as the target and the thickness of the part of the frame as the variable,the dimensions of the frame are optimized on the premise of ensuring the strength and stiffness,and the purpose of the frame lightweight is achieved.