Lightweight High Strength Steel-aluminum Alloy Assembled Wheel Based On Fatigue Properties Multi-objective Optimization Design

With the rapid development of my country’s auto industry and the implementation of strategies such as energy conservation and emission reduction,major auto companies have placed automotive lightweight technology in an important position in the future technological development route.In the driving system of the vehicle,the wheel is an important safety component,and the quality of the wheel structure design will directly affect the driving safety performance of the vehicle.Fatigue damage is one of the main causes of wheel damage.Therefore,the lightweight design of wheel structure based on dynamic bending and radial fatigue performance can effectively achieve energy saving and emission reduction,thereby improving the performance and market competitiveness of wheels.In order to study the fatigue performance of passenger car wheels and carry out the lightweight multi-objective optimization design of the wheel,and consider the manufacturing cost of the wheel to realize the lightweight of the wheel,this paper takes the J-type wheel as the research object,based on the bending and radial fatigue of the wheel Performance,design and optimization of a high-strength steel-aluminum alloy wheel.Firstly,the conceptual design model of the wheel is es Tab.lished,and the topology optimization of the spoke parts is carried out in combination with the bending and radial fatigue test conditions,and the initial structure model of the wheel is es Tab.lished with reference to the optimization iteration results;Under the working conditions,the finite element performance analysis of strength,stiffness and fatigue life of the assembled wheel was carried out.Secondly,the parametric model of the wheel is es Tab.lished,and 10 thickness design variables and 2 shape design variables are defined in total.Based on the Isight software,the wheel mass,bending fatigue life,and the maximum Von Mises stress of the spoke under bending and radial conditions are used as the performance response parameters.,using the optimal Latin hypercube experimental design method to fit the Kriging approximation model,and using the Hammersley experimental design method to test the accuracy of the approximate model.According to the es Tab.lished Kriging approximation model,the second-generation non-inferior sorting genetic algorithm is used to optimize the wheel with multiple objectives.And compare and optimize the main performance parameters of the front and rear wheels.Finally,the optimized wheel is verified by bending and radial fatigue tests.The test results show that the optimized high-strength steel-aluminum alloy assembled wheel has a weight reduction of 3.017 kg compared with the same type of aluminum alloy wheel under the requirement of wheel fatigue performance.The weight is reduced by 35.49%,which significantly reduces the mass of the wheel and provides a new idea and technical basis for the lightweight design of the wheel...