Research On Handing And Stability Of Passenger Car Under Cross-wind

High travel speed is a major goal for the big automobile enterprises and researchinstitutions to pursue, and also an important indicator to measure one car’s dynamicperformance. While the complex driving environment may cause some impacts thatshould not be ignored. Strong cross-wind leads to the vehicle’s imbalance and accidentscaused by this happen frequently. In today’s speed increasing, how to make the body interms of ensuring a more stable at high speed has become an important research topic.In this paper, setting the handing and stability of passenger cars under cross-windas the research object, applying the VPT to complete the simulation of the vehiclemodel. VPT can be applied to estimating the performance of products, finding theproblems and making adjustments as early as possible. Compared with the previousmethods such as wind tunnel experiment, VPT has shorter research period, higherefficiency, less cost and safer operating environment.The paper enumerates the aerodynamic forces acted on vehicles, and introduces thereason lateral wind generated in brief. Aerodynamic side force and yawing moment arethe major objects to research, which influence the vehicle handing and stability mostunder cross-wind environment. Based on Adams/Car, building a multi-body dynamicsmodel with two degrees of freedom, including front and rear suspension systems,steering systems and tires. Different conditions are set for simulation as well. Bymodifying the position of C.P, vehicle speed and types of cross-wind, making anobservation about parameters of handing and stability when characteristics abovechange. Lateral acceleration, yaw velocity, lateral displacement and other indicators areselected for the study. The paper summarized the effects of various parameters onvehicle handling and stability by comparing the test results.Utilizing Adams/Insight module, author selected hard points and performance parameters of the model from some vital parts as design variables for DOE test, andthe results will be ranked. By analyzing the test results, summarizing the severalparameters, which have larger affect on vehicle handing and stability. The results can beused for later work in optimal designing of vehicle.Finally, on the basis of summarizing the predecessors and the research work in thispaper, proposed to improve vehicle handling and stability in cross-wind environment inseveral ways and provided some meaningful reference for automotive optimization design.