基于有限元和虚拟样机的增程器混合模型设计

Hybrid Model Design of a Range Extender Based on Finite Element and Virtual Prototype

运用有限元技术对增程式电动汽车的部件曲轴进行了静态与动态有限元分析,并获得了柔性曲轴,结合虚拟样机技术建立了增程器轴系系统数字样机刚柔混合多体动力学模型。利用制图软件,建立了增程式电动汽车轴系系统三维实体模型;通过对曲轴这一重要部件进行有限元强度分析,对增程器应力要求进行了检验;通过模态分析,检验了模型的动态性能,并为后续柔性混合体的建立做了准备;结合虚拟样机技术,建立了合格的增程器轴系系统数字样机刚柔混合多体动力学模型,可用于动力学仿真及故障诊断。

Using finite element technology,static and dynamic finite element analysis is carried out on the crankshaft of an extended range electric vehicle and a flexible crankshaft is obtained.The dynamic model of rigid-flexible hybrid multibody of digital prototype for the range extender shafting system is established with virtual prototyping technology.By drawing software,3D solid model of the shafting system of the extended range electric vehicle is established.Stress requirement of extender is tested through finite element strength analysis of crankshaft.The dynamic performance requirements of the model are tested through modal analysis,what’s more,it makes preparation for the subsequent establishment of the flexible mixture.Combined with virtual prototype technology,a qualified dynamic model of rigid-flexible hybrid multi-body of digital prototype for the range extender shafting system,which can be used for dynamic simulation and fault diagnosis is established.