考虑副车架柔性的整车平顺性仿真研究

Simulation Study on Ride Comfort of a Vehicle Considering Flexibility of Subframe

针对副车架柔性变形对平顺性的影响,建立了某车的后副车架模型,利用HyperMesh对该后副车架进行典型工况下的强度和模态分析,将生成的.mnf柔性文件代入该车模型中以替换原有副车架,得到含柔性副车架的整车刚柔耦合模型。通过ADAMS对所建刚柔耦合整车模型进行随机沥青路面及脉冲路面仿真,并与含刚性副车架的整车模型进行对比分析。结果表明:相比具有刚性副车架的整车模型,在两种路面下,刚柔耦合整车模型的驾驶员座椅处加权加速度均方根值更小,整车的平顺性更优。

Aiming at the influence of flexible deformation of the subframe on ride comfort, the rear sub-frame model of a certain vehicle is established. The strength and modal analysis of the rear subframe under typical conditions are analyzed by HyperMesh, and the generated MNF flexible file is substituted. In the model of the vehicle, the original sub-frame is replaced to obtain a rigid-flexible coupling model of the vehicle with a flexible subframe. Random asphalt pavement and pulse pavement simulation were carried out by ADAMS on the rigidflexible coupled vehicle model, and were compared with the vehicle model with rigid subframe. The results show that, compared with the model with rigid sub frame, the weighted acceleration of the driver's seat at the driver seat of the rigid flexible coupling vehicle model is smaller and the ride comfort of the vehicle is better on the two kinds of road.