The Frame Design And Finite Element Analysis Of The Pure Electric Bus

As a very important part of the automobile,the automobile frame needs to bear various static and dynamic loads,which directly determines the safety and comfort of a car.Therefore,the design and analysis of the frame has always been the key work in vehicle engineering,and has attracted much attention.This paper intends to focus on a full-load pure electric bus,to carry out a comprehensive and detailed discussion on the frame design scheme.According to the design objectives,the frame selection,each section of the design and other related contents were systematically and comprehensively introduced.A simple and accurate 3d model is created by the 3D drawing software CATIA,then used Hypermesh platform to pretreat the 3D model and create a reasonable finite element analysis model.Through importing Finite Element Analysis Model into Nastran Solver and static analysis of the frame combining with the four most common working conditions in the actual driving process of the bus,we can calculate the structural strength and stress distribution of the frame.At the same time,in order to grasp the dynamic characteristics of the car.The modal analysis was used to whole vehicle and obtain the first ten natural frequencies and corresponding modes of the whole vehicle.Based on two different test methods,this frame was verified.Finally,the test results were compared with the simulation results obtained by the software,which confirmed the function and effect of finite element analysis in the design of automobile frame.According to the analysis,the results show that the frame design scheme of fully loaded pure electric bus presented in this paper is rigorous,perfect,reasonable and feasible.It will be a major reference to the design and production of other similar bus frame.