Investigation On Simulation And Test About Aluminum Wheel Vibration Response Rigidity

Wheels, an important part of automotive chassis, transmit the driving force and help vehicles to achieve mobility. Structure properties of wheels significantly influence the safety and reliability of vehicles, and the reaction of which responds to external forces straightly reflects in the performance of vehicles. As modern vehicles, users nowadays seek not only safety but also riding comfort and driving stationarity from automobiles.Since traditional wheel design only considered the requirement of strength, in criterions like ISO, JASO and GB, we could find specific stipulations about safety especially strength performance, which lead to the requirement that aluminum wheels must pass bending fatigue, radial fatigue and impact tests. However, they rarely considered the stipulations which measured the influence of aluminum wheels on riding comfort and driving stationarity. There were only stipulations about rim bounce and wheel balance at most. The rigidity, especially dynamic rigidity, is an important index which shows the influence that road surface and vehicles did to wheels. The force from road surface passed through tires to wheels influences the driving stationarity of vehicles, furthermore, the judgment on comfort of users.This dissertation based on comparison of experiments and Finite Element Analysis(FEA) on aluminum wheels in CITIC Dicastal corporation, studied the influence of wheel structures on rigidity and compared the results of both simulation and experiments.To reach the goals, theoretically based on solid mechanics(including elastic mechanics and vibration mechanics) numerical simulation, combining the comparison of particle performances and experiment results of wheel structures, we built an FEA model of natural frequency and dynamic response rigidity of aluminum wheels and verified the model by experiments. In building the model, we simulated the condition of wheels in typical position under external load by building a transient loading function. We also calculated rigidity of wheels by calculating the response of wheels under external load.We tested the response(i.e. acceleration) of wheels under external load by dynamic resistance strain gauge and data acquisition instruments in reality. To check the result that the FEA model building for dynamic response rigidity of wheels whether is suitable, can the results of FEA simulation match the actual results of rigidity of wheels. By analyzing and comparing the experiment and simulation data of different aluminum wheels, we were going to draw a correlation curve of FEA and actual tests results, which could be used as a reliable judgment of FEA results in the future.