Multi-objective Optimization Design For The Lightweight Wheel Of Structure-Materials Integration

Wheels play a very important role when the vehicle is running, it is not only capable of transmitting power, but also can provide a reliable guarantee for the safety of driving, so the performance of wheels will directly affect the safety of driving the vehicle. With the issues of environment and resource becoming deteriorated, people pay more attention to the lightweight vehicle. As wheels are the integrated parts of the car which are working for rotating and moving,designing lightweight structure of them not only can improve the fuel economy, reduce emissions, but also can improve its market competitiveness.This study is based on the National Natural Science Foundation Project "One structure of wheel assembled with Magnesium aluminum alloy-Using the method of multi-objective optimization approach to study the performance of lightweight-materials-Integration". Firstly,building the base model of a 16-inch wheel which the spokes are totally closed, and then making the topology optimization design of it. Combined with results of the topology optimization design, establishing a 16-inch wheel of five spokes, and then designing an assembled structure of a wheel on the basis of it. Using bolts to connect spokes and rims of the wheel on the position of the connection between the spokes and rims.Based on the national standards GB / T 5334-2005 " Wheels of passenger car performance requirements and test methods", making analysis of the assembled wheel on strength, stiffness,fatigue life of radial and bending conditions. And then making impact test of it. Finally making the modal analysis of it. The results show that the initial assembled wheel which is designed by topology optimization has more spare on the performance on strength, stiffness, fatigue life and the maximum stress on impact test, so it is necessary make further design for the structure of the assembled wheel to make it lightweight.Making the parametric modeling on the basis of the configuration parameters of the initial model, and through multi-objective optimization methods in Hyperstudy software to make more detailed size optimization for the structure of the assembled wheel. Finally determine the schemeof the lightweight assembled wheel.Establishing the geometry model of assembled wheel based on the scheme of lightweight design which is deal with engineering. Making performance analysis of it, including strength,stiffness, fatigue life of radial and bending conditions, impact test and modal analysis, and then making comparison with the performance which the initial wheel has. The results showed that the final lightweight structure of the wheel meets the performance requirements of the wheel,and also achieved significant weight loss which is 14.4%.