Improved design of electric vehicle frame based on ANSYS

GE Jinpei, LONG Haiyang, JU Liying, LI Yaogang

(North China University of Science and Technology, Tangshan 063009, China)

Abstract: Aiming at the problem that the structure design of a certain type of electric vehicle frame whether it is reasonable, the structure rigidity, strength and dynamic characteristic of the frame were studied. Firstly, the finite element model of the frame structure was established by the Concept in the Workbench. The frame under full load bending and emergency braking of displacement and stress distribution was analyzsed. And then the structure mode of the frame was studied by using the Block Lanczos method. The first six order natural frequencies of the frame under full load bending condition were extracted. Aiming at the problem of poor dynamic performance of frame structure, the corresponding improvement scheme was put forward: the elastic component of the rear suspension of the frame is changed from the original spiral spring to the leaf spring. The improved frame was checked. And the results indicate that the displacement and deformation of the frame is reduced, the stress of the structure is reduced, and the natural frequency of the lower order is improved, which illustrates that the improved scheme is reasonable and provide reference and basis for the design and improvement of the frame.

Key words: ANSYS; frame; finite element; structural improvement