Simulation Analysis And Optimization Research For Ride Comfort And Handling Stability Of Heavy Tractor

Ride comfort and handling stability are important performances of a car, directly affect ride comfort and driving safety of the vehicle, and get more and more attention in the design of the modern automobile. In the engineering practice, through the analysis of some key parameters such as suspension parameters on the influence of the vehicle ride comfort and handling stability, and make an adjustment of these parameters to improve evaluation index. The content of this article is the optimization of ride comfort and handing stability performance by changing the parameters of cab mounting system, suspension system and stabilizer bar stiffness. Reducing the vibration of the driver, improving comfort and reducing the security hidden danger are particularly important, because the heavy tractor need so long time driving on the highway.In this paper, it takes a heavy tractor with an air suspension as the research object, and establishes the full-floating cab suspension, air suspension and other subsystem models and the whole virtual prototype model. The ride comfort and handling stability simulation are made under the random and pulses pavement. The index of handling stability is evaluated with reference the cumulative contribution rate theory. Regarding the cab mounting parameters, suspension parameters and the horizontal stabilizer bar stiffness as variables, the sensitivity analysis is executed. Combining with the response surface method, the multi-objective collaborative optimization model is established and resolved to get the optimal solution of the model and the corresponding variable factor. According to the variable, factor parameters are adjusted, and the simulation result of the ride comfort and handling stability before and after the optimization is contrasted. The result shows that the ride comfort and handling stability are improved after the optimization. It proves that the optimized scheme is feasible.