Research On The Lightweight Of Non-load-bearing Electric Sightseeing Vehicle

In recent years,with the rapid development of the manufacturing industry,China has become the first country in the world to produce and sell automobiles.At the same time,the greenhouse effect,environmental degradation and energy consumption are becoming more and more serious,and the concept of energy conservation and emission reduction has been paid more and more attention.Under this situation,people further increase the research on vehicle lightweight for controlling fuel economy and emission,and the solution to the problem of short range of electric sightseeing vehicles has also been put on the agenda.However,vehicle lightweight is not a single vehicle weight reduction,but the performance parameters,processing costs,processing technology and other factors should be considered at the same time.Single weight loss is not satisfied with the requirements of today’s vehicle lightweight,therefore,comprehensive optimization of vehicles has great significance.At present,the light weighting mainly starts from three aspects:material optimization,structure optimization and processing technology optimization.Based on Ashby method and finite element theory,this paper takes a sightseeing vehicle as the research object to optimize the material and size of the vehicle.This is validated against the Workbench software.The research content of this paper mainly includes the following aspects:(1)Completed the 3D modeling of the car body through 3D scanner and SolidWorks soft armor.Based on the finite element theory,the free mode analysis of the car body was carried out by using Workbench software to analyze the first ten order free mode frequencies and modes of vibration of the car body.(2)The materials of the sightseeing car body and frame are introduced,and the performance of the alternative materials is analyzed.The thickness of the car body is selected as the design variable through ASHBY method and genetic algorithm,and then the lightweight scheme of the car body materials is obtained based on genetic algorithm in the Excel table.Then,by combining with ASHby diagram,static analysis is carried out on four working conditions of the car body.Based on the theoretical basis of strength,bending stiffness and torsional stiffness,the maximum stress and strain of the car body are calculated and analyzed to verify the feasibility of the car body(3)based on the theoretical basis,the sensitivity analysis of frame size optimization,sensitivity analysis was carried out on the frame first,get the sensitive degree of the selection of beam,size optimization model is established,and then select 30 sample points were analyzed,and the calculation of thickness of 2.7 mm of frame meet the requirements of size optimization,simulation working condition of horizontal bending,verify the feasibility of size optimization,the frame weight 15%,eventually achieve the study of automotive lightweighting.Figure[46]Table[13]Reference[80]...