某重型车悬置支架的模态分析与改进

Modal analysis and improvement of a heavy duty vehicle mount bracket

在动力总成悬置系统设计开发过程中,由于悬置支架刚度低造成车内结构振动与噪声增大的案例已经被证实,文章运用HyperMesh有限元分析软件建立某重卡悬置支架的有限元模型,从悬置支架结构优化设计的角度来说明不同支架结构及车架安装点对模态的影响,得出重卡悬置支架安装在车架腹面比安装在车架翼面更有利于刚度的提升。

In the process of design and development of powertrain mounting system, the case that the vibration and noise of the vehicle structure has been increased due to the low stiffness of the mounting bracket has been confirmed. In this paper,FEA software HyperMesh to establish a heavy truck suspension bracket of the finite element model, from the mounting bracket structure optimization design point of view to illustrate the different frame structure and frame installation influence on modality, that heavy truck suspension mounting bracket is installed in the ventral surface of the frame than the installation frame wing surface is more conducive to enhance the stiffness.