Application Of TRB Components In Pure Electric Vehicle Body Structure

As one of the major inventions in the 19 th century,the emergence of automobile greatly improved the convenience of people’s transportation.With the continuous development of economy and economy,the problems of energy and environment are becoming more and more serious,so pure electric vehicles will gradually become people’s daily travel tools.Rolled differential thick plate is a new type of plate with continuously varying thickness.Compared with traditional equal-thickness plate,it can not only meet the specified safety performance,but also distribute the thickness of structural parts more reasonably,thereby improving the structure The other properties of the parts are also combined with market demand,so this paper uses continuous variable cross-section plates to design the front hatch of a pure electric vehicle.The main research process and conclusions are as follows:(1)For a certain type of pure electric vehicle front hatch as a research object,a finite element model of subsequent simulation was established.Seven common operating conditions(latch load condition,torsional load condition,front beam load condition,rear beam load condition,concave resistance condition and free modal condition)were selected for finite element analysis,and obtained The displacement and stress clouds and free modal clouds of the front hatch of the benchmark vehicle provide some numerical basis for the TRB front hatch.(2)The geometric model of the non-perforated front hatch is established by using Catia,and the finite element meshing of it is performed by using Hypermesh to obtain the finite element model of the front perforated hatch.For better comparison,this paper also performs a finite element analysis of seven working conditions on the front hatch without holes,and obtains the corresponding values.Then set the constraint boundary condition parameters,topography optimization parameters and topology optimization parameters for the non-porous front hatch,set the optimization design goals,and finally use Optistruct to perform specific topography optimization and topology optimization operations.(3)According to the density and cloud map optimized by topology and morphology,a preliminary establishment of the TRB front hatch inner panel model was carried out,that is,the non-porous front hatch inner panel was divided into 15 areas,and then based on orthogonal test design,and comprehensive balance analysis was applied simultaneously.France designed the TRB front hatch.Finally,the finite element analysis of the seven working conditions of the TRB front hatch and the comparative analysis of the various working conditions of the three front hatches are performed.The structure meets the design requirements and the performance is improved.The stress is greatly improved.(4)After the design of the TRB front hatch is completed,an explicit direct integration method is used to establish a collision finite element model for the nonlinear transient analysis of the front hatch.Collision simulation experiments were carried out on the front hatch of the benchmark car,the front hatch without holes and the front hatch of TRB.The reliability of the finite element model of the collision of the front hatch was carried out according to the energy change curve and the mass change curve in the simulation analysis results.After verification,the front hatch of the benchmark car,the front hatch without hole and the front hatch of TRB are very reliable.Finally,according to the displacement and speed curves of the benchmark car front hatch,non-porous front hatch and TRB front hatch node 200131317,the TRB front hatch has good collision safety and is superior to the other two forms of front Hatch cover crash safety.