Analysis Of The Structure Design Of A Miniature Electric Vehicle Body

With the shortage of petroleum resources and the increasingly severe environmental protection situation,urban parking is difficult.The two miniature electric vehicles have the characteristics of small size and convenient parking.The miniature pure electric vehicles have a very broad market in China.During the development process,the body must meet certain dynamic and static performance requirements,and its structure needs to be analyzed and optimized.After optimization,it can be manufactured according to the design data.This paper takes the first-order body engineering data of a micro-pure electric vehicle that a company is developing as the research object,establishes a finite element model for the white body,and establishes a finite element collision model for the whole vehicle.Based on the established finite element model,the static performance of the body,stiffness and strength of the body-in-white is analyzed,and the dynamic performances such as frontal collision and side collision are analyzed.The low-order mode of the body-in-white and the stiffness and the deformation of the door and window under bending and torsion conditions are obtained.The body is in the vertical bump condition,the right steering condition,the forward braking condition,and the maximum forward acceleration.In the case of strength.At the same time,the performance parameters such as the intrusion amount of the white body dash panel and the door intrusion speed under frontal collision and side collision are also obtained.Through the performance analysis of the finite element model dynamic and static,it is preliminarily judged whether the white body meets the design requirements.According to the results of the dynamic and static performance analysis of the first version of the body-in-white engineering data,the design of the white body structure is rationally improved.Firstly,the design and optimization of key sections and structural forms of some body-in-white parts were carried out.Then,with the goal of weight reduction,the sensitivity optimization method is used to optimize the size design of parts of the body-in-white.Through the verification and analysis of the optimized body-in-white performance,the mass is reduced by 10.7kg,the weight-reduction ratio is 4.65%,the bending stiffness is increased by 3.35%,and the torsional stiffness is increased by 2.48%.The optimization scheme basically meets the specified design requirements,and at the same time,the performance improvement is carried out,which proves that the optimization scheme is feasible.The research results provide technical support for the design and development of the body-in-white,and have certain engineering application value.