Multi-objective Optimization for Third Generation Wheel Hub Bearing Based on NSGA-II.

The third generation driving wheel hub bearing of certain vehicle is considered as research object. Fatigue life, abrasion life and spin roll ratio are considered as the optimization targets. Penalty function is introduced to deal with constraints. Multi-objective optimization is carried out by NSGA-II. Through the finite element analysis, the stress of the pre-optimization structure is compared with the optimal one. The analysis results show that: Under the condition of meeting all the required constraints, these performances of wheel bearing are improved in different degrees. The stress concentration of inner flange, outer flange, inner ring and balls is reduced. Overall maximum stress of the model decreases by 8. 61% compared with that of the pre-optimization one. [ABSTRACT FROM AUTHOR]