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为提高车辆行驶平顺性,建立某四轴重型商用车悬架动力学模型,并对悬架参数进行优化。模型中,在车辆结构上考虑了平衡悬架和驾驶室,在悬架力学特性上考虑了阻尼非线性。采用遗传算法对车辆悬架的刚度特性和阻尼特性进行优化,优化综合考虑了车辆在不同路面等级下以不同车速行驶的平顺性。对优化前后驾驶室处垂直加速度均方值进行仿真对比,结果显示,优化后车辆行驶平顺性得到有效提高。
In order to improve the ride comfort, a four-axle heavy-duty commercial vehicle suspension dynamics model was established and the suspension parameters were optimized. In the model, balanced suspension and cab are considered in the vehicle structure, and damping nonlinearity is considered in the suspension mechanical characteristics. The genetic algorithm is used to optimize the stiffness and damping characteristics of the vehicle suspension. The optimization considers the ride comfort of the vehicle at different speeds under different road surface levels. The simulation and comparison of the mean square value of the vertical acceleration at the cab before and after optimization shows that the ride comfort of the optimized vehicle is effectively improved.