商用车驾驶室悬置系统优化

Research for Commercial Vehicle Cab Suspension System Optimization

在多体动力学软件ADAMS中建立商用车驾驶室悬置系统虚拟样机模型,选取驾驶室悬置刚度和阻尼参数以及位置参数为设计变量,以驾驶室综合加权加速度均方根值、俯仰加速度均方根值、侧倾加速度均方根值和后悬置减振器夹角为优化目标,驾驶室前后悬置动挠度为约束条件,利用软件ISIGHT搭建优化平台,采用MIGA算法对行驶平顺性进行多目标优化,得到驾驶室悬置结构参数最优解集。在此基础上,优化分析后悬置水平与垂向减振器夹角对驾驶室隔振的影响,再通过权重系数与比例系数对各优化目标进行权衡,以此提高商用车的振动舒适性。

The virtual prototype model of commercial vehicle cab suspension system in multi-body dynamics software Adams was built,and the cab suspension stiffness and damping parameters and positional parameters were select as design variables,and the weighted RMS of acceleration and pitch acceleration root mean square value and the roll acceleration root mean square value and the angle between suspension shock absorber were built as the optimization goals,taking the cab suspension dynamic deflection as constraint conditions,and the software ISIGHT optimization platform was built,through which optimal solution set of cab suspension structure parameters was obtained. On this basis,the optimization analysis of the angel between after horizontal shock absorber and vertical shock absorber influence on vibration isolation was carried,and the optimization goal of weight coefficient and proportionality coefficient were weighted,through which to improve the ride comfort of the commercial vehicle.