Research On Lightweight Frame Speed Of Pure Electric Vehicle

The current electric vehicle frame of market circulation are square steel, angle steel. Theframe body which is composed of a beam like structure formed by spot welding. The overallweight concentrated in the frame parts, and there is no accurate calculation of frame bearing.Electric vehicle manufacturers frame material more use comes from experience, experiencethat the profile bearing electric vehicle frame10people will electric car frame manufacturingcarrying6people or4people. At the same time as the electric vehicle industry in China hasnot formed enough market competitiveness, which leads to the manufacturers have enoughprofit can be obtained, which don’t have to consider from the control of production cost ofsubtlety. Another point to low speed, pure electric vehicles, the main sources of cost in thebattery prices, general user life expired end-of-life vehicle battery choice in this situation,even make the electric car manufacturers in the production process automatically ignores theantirust processing frame, thereby indirectly caused by environmental pollution.Using finite element analysis model of the frame is established in this paper, analysis ofthe strength and stiffness of the frame, according to the results of the analysis to determinewhether can meet the normal use of the automobile, and further on the bearing point withloading, in order to achieve the purpose of lightweight car body design; and through the studyand analysis of the other steel, angle steel and other materials combination density smaller,trying to be non bearing point or bearing small area replaced by other materials, such asaluminum alloy profile, by rivet connection into a whole. Then the same analysis model isestablished using finite element analysis, analysis of the strength and stiffness of the frame,according to the results of the analysis to determine whether can meet the normal use of theautomobile, and further on the bearing point with loading, in order to achieve the purpose oflightweight body design.Using Catia V5R20to model for the four pure electric automobile frame to establish the3D digital model, triangular and rectangular two ways to use the division of the grid in theanalysis process, while strictly by Aspect Ratio value=1, verified the correctness of modelingparameters. According to the actual loading condition, the overall frame of the finite elementanalysis was carried out using Ansys Workbench finite element analysis of14.5functions, to determine the quality of the frame is94.404kg, the maximum strain0.00119mm. The use ofAnsys Workbench14.5optimization function optimization design of steel aluminum hybridstructure of low-speed electric car frame, the structure before and after optimization werecompared, the maximum strain frame after optimization was decreased by5%, the weight ofthe whole frame drops26%, realized the goal, the optimization effect is obvious. On theperformance of steel aluminum joint mixed structure were analyzed, comparing the embeddedweb plate riveting riveting and welding two ways that embedded riveted to the stress anddeformation of welding plate riveted only the stress and deformation of20%. That is, the jointperformance of the former is far better than the latter.