Design And Simulation Of All Terrain Agricultural Electric Vehicle

Based on three axle steering electric vehicle as the main research object, a new all-terrain agricultural electric vehicle was designed. The main contents can be listed as follow:1、Analysed the research situation of domestic and international.And designed the structure of electric vehicle by catia software, selected calculation for drive motor and power battery, and test the dynamic performance and fuel economy in this paper.Then, found the top speed, climbing ability and renewal drove mileage conform to design demands.2、Aimed at decreasing the weight of frame of the electric car, a finite-element model of frame was established by the 188 beam element model of dynamic explicit ANSYS software. And treat the model by simulated analyses are performed for three kinds of typical working conditions,such as horizontal load, limit dangling and head-on collision,and optimized design the frame structure based on the result. Under the condition of meeting the requirement of vehicle, the quality of frame was declined by 40.3%.3、Taken steering wheel sideways displacement as optimized goal, established the model of 1/2 suspension links for the electric vehicle by ADAMS/view module.And caught the change curves of four-wheel alignment when the wheel is up and down after the simulation is over. And measured the change for parameter of kingpin, upper cross arm and lower cross arm. The value of the sideways displacement decreases by 91.7% compared with the initial design parameters,thus the tire’s wear was reduced.4、Established the three axle steering parameterized simulation mode by ADAMS/view module.Builded the theoretical rotation angle for each tire.Taken the weighting function of the deviation between the theoretical rotation angle and the actual angle as optimization goal. Took various spatial sizes, spatial location and other parameters of steering trapezium as design variables, optimized design the steering trapezoid mechanism. And then,took the deviation between theoretical rotation angle and actual angle as the optimization goal by least square method. According to spatial position of the drag link as design variables, optimization design the angle deviation of the steering system.5、Established the virtual prototype simulation model by ADAMS/view module. The simulation showed that the handing stability of vehicle was better after virtual test and research for typical test conditions, which contain steady state steering test,serpentine test and steering wheel angle step input test, but the steering sensitivity was low.