汽车侧风稳定性的仿真与评价*

doi:10.19562/j.chinasae.qcgc.2019.011.009

Abstract

Abstract: This paper aims to study the driving stability issue of vehicle caused by trajectory deviation due to the action of sudden or sustained sidewind on high-speed driving vehicle. Firstly, the aerodynamic characteristics of the vehicle under crosswind conditions are obtained by CFD simulation and compared with the results of wind tunnel test. Then, the six aerodynamic component forces obtained by CFD simulation are loaded on the vehicle dynamics model to predict the yaw rate and lateral deviated displacement of vehicle under crosswind conditions. Finally, a real vehicle road test is conducted to compare the stability of two vehicles subjected to the same pattern of crosswind by means of subjective evaluation. The results show that the simulated maximum yaw rate and lateral deviated displacement of vehicle A and vehicle B with a driving speed of 100 km/h and after 0.5 s action of crosswind with a windspeed of 80 km/h are 2.69°/s, 265 mm and 3.79°/s, 374 mm respectively, and their subjective evaluation results are “good” and “relatively good” respectively. Finally, an evaluation criterion is established to provide a guidance for crosswind stability development at the detailed design stage of new model program.

Key words: vehicle engineering, crosswind stability, Star ccm+/ADAMS joint simulation, subjective evaluation

Yuan Xiayi, Chen Lin, Li Shuai, Wang Wenyuan. Simulation and Evaluation on the Crosswind Stability of Vehicles[J].Automotive Engineering, 2019, 41(11): 1286-1293.

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Simulation and Evaluation on the Crosswind Stability of Vehicles

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