Analysis And Research On Side Impact Safety Of A Miniature Electric Car

With the rapid increase in the production,sales and possession of pure electric vehicles,improving the safety performance of pure electric vehicles has become a hot research direction.The safety of a pure electric vehicle mainly refers to the safety of collision.Since the strength of the side body of the passenger compartment of the vehicle is weak relative to other areas,the energy absorption space is small,and the side collision usually causes greater damage to the occupant.Therefore,it is very practical to study the safety of side collisions in the collision safety of pure electric vehicles.Compared with the traditional fuel vehicle,the pure electric vehicle has a flat battery on the bottom of the floor,which leads to the consideration of more factors in the process of side collision of the pure electric vehicle.For example,the intrusion of the side structural parts causes the battery module.The impact includes the structural safety and electrical safety of the battery module.This paper takes a pure electric vehicle with good response in the market as the research object.The CATIA is used to build the digital model of the whole vehicle,and then the digital model is imported into Hypermesh to establish the finite element model.The process of establishing the finite element model includes both the basic process of modeling and the related considerations and practical skills according to the relevant project experience,such as the simplification of the model.Finally,the K file is exported to ensure smooth operation in LS-DYNA,and the side impact result can be obtained.The data for the relevant results are displayed using the Hyperworks software.,which can output the energy curve,the deformation of related components,the displacement,velocity and acceleration of key nodes.Finally,the lightweight design was carried out under the condition of satisfying the safety of the automobile structure,and the purpose of weight reduction was achieved.The conclusions of the paper study are as follows:1.Observing the side curve simulation results of the pure electric vehicle CAE model,reading the energy curve,additional mass curve,B-pillar,maximum door intrusion and intrusion speed data to determine the reliability of the model and the part that needs to be optimized.2.To propose a lightweight modification scheme for the original model,and use the multi-factor weight optimization algorithm based on the orthogonal design method to optimize the design of the seven factors of the side structure,and determine the side structure that meets both the safety performance and the lightweight requirements.parameter.3.Comparing the optimized model with the original model,it can be observed that the strength of the side structure is slightly increased,and the final weight loss is 23.5%.