Finite Element Analysis And Improved Design Of Rear Frame Of TY Type Underground Rubber-Tyred Vehicle

Taking a TY type underground rubber-tyred vehicle as study object, this paper makes a structural failure analysis and improvement on rear frame by using FEA on the basis of the early crack of rear frame of underground rubber-tyred vehicle, and establishes a virtual prototype model for vehicle dynamics simulation analysis. What's more, it also carries on a electrical test on the rear frame, and verifies the accuracy of finite element model and the reliability of finite element analysis. Finally, the lightweight optimization design on rear frame is carried on. The main contents are as follows:1) The paper uses ANSYS to set up the 3D geometric model and finite element model of rear frame. Based on this, the paper makes finite element static strength analysis on rear frame, and obtains the stress and strain of rear frame in blending, torsion joint, unloading condition.2) The paper makes a modal analysis on the rear frame, and acquires the inherent frequency and vibration mode which is compared with the Excitation frequency. 3) Based on the comparison between the finite element analysis results and the actual fracture site of the rear frame, the paper analyses the reasons of the earlier crack of rear frame and makes an improvement on the saturation. Also the paper proposes a program and verifies the rationality of the improved program through FEA.4) According to finite element analysis results and the actual fracture site, the paper divides and assembles the rear frame, creates a simplified three-dimensional model of vehicle and the virtual prototype model, and makes a typical dynamics simulation analysis for the structure dynamic response characteristics.5) Based on the actual destruction positions of frame structures and finite element analysis results, carried out on the rack loaded with bending and bending and tensional testing conditions of the electrical test, by analyzing the test results and the results compared with finite element analysis to verify the accuracy of the finite element model and finite element analysis of reliability.6) Finally, the light weight optimization is executed, which gets a decrease of 16.1% over the original machine. It makes good foundation to improve of power performance and fuel economy of the underground vehicle.