摘要
研究汽车悬架系统结构与驾驶平顺性相关问题,对于提高乘客的乘车体验以及车辆悬架参数合理性设计问题具有重要意义。其难点在于如何对所选取的车辆模型进行系统的平顺性评估。针对驾驶平顺性难以准确的评估的问题建立了一种将路面激励模型与汽车悬架系统模型相结合的汽车平顺性仿真分析模型。首先,对汽车驾驶平顺性的影响因素与评价标准进行了分析,建立平顺性评价的指标体系和评价模型,采用控制变量法研究了路面不平度、汽车车速对汽车驾驶平顺性的影响。其次,研究了悬架刚度系数与悬架阻尼系数对汽车行驶平顺性的影响。仿真结果表明,随着车速和路面不平度等级的增加,汽车的平顺性逐渐变差;随着悬架刚度系数与悬架阻尼系数增加,汽车平顺性也在一定程度发生变化。应用所建立汽车平顺性分析模型对车辆平顺性进行系统的评估,针对性的将相应参数进行改变,可使乘客获得更好地乘车舒适性。
The research on the structure of vehicle suspension system and the driving smoothness has important significance for improving the passenger riding experience and the rationality design of vehicle suspension parameters. The difficulty is how to systematically evaluate the smoothness of selected vehicle model. It is difficult to accurately evaluate driving smoothness. Therefore, a simulation analysis model of vehicle ride comfort based on combination of road excitation model and vehicle suspension system model was put forward. Firstly, influencing factors and evaluation criteria of driving smoothness were analyzed. Then, the index system of smoothness evaluation and evaluation model were established. Meanwhile, the control variable method was used to research the influence of road roughness and vehicle speed on vehicle ride comfort. Secondly, the influence of suspension stiffness coefficient and suspension damping coefficient on vehicle ride comfort was researched. Simulation results show that the vehicle ride comfort gradually gets worse with the increase of vehicle speed and road roughness. With the increase of stiffness coefficient and camping coefficient of suspension, vehicle ride comfort changes to a certain extent. The analysis model of vehicle ride comfort was used to evaluate the vehicle ride comfort. The corresponding parameters were changed with a clear aim, so that the passengers can get better ride comfort.
引文
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