Optimization Of Wear Resistance Of 275/70R22.5 Radial Tire For Green Bus Based On ABAQUS

275/70R22.5 all-steel radial truck tires with lower flate rate have a higher matching rate in the new energy green bus.This article based on ABAQUS finite element analysis software,takes 275/70R22.5 16 PR all-steel radial truck tire as the research object,selects Yeoh model describes rubber materials,uses "rebar" rib elements to describe rubber-cord composite materials,establishes a three-dimensional ground contact finite element model of tire,and verifies the effectiveness of finite element model of initial design tire.Aiming at the problem of poor wear resistance that occurs during the actual use of tires,a multi-scale simulation method is adopted.Materials Studio molecular simulation software is used to optimize the selection of tread rubber anti-aging agents on the micro scale,and the steady-state rolling analysis and optimization design of tire are carried out based on ABAQUS finite element analysis software on the macro scale.Through simulation analysis,it is found that ground pressure at the edge of the shoulder and the center of the crown of initial design tire under static load working condition is relatively large and the area with the largest contact pressure is located at the edge of the shoulder.In view of the uneven distribution of the tread pressure,the ground pressure distribution of tire is optimized by adjusting the belt structure design parameters and the height of crown arc,thereby optimizing the wear resistance of tire.Establish the optimized tire finite element model,and obtain the influence law of structural design parameters of 2# and 4# belt(2# working layer and 4# buffer layer)width,the arrangement angle of the 2#,3# and 4# belt layers(2#,3# working layers and4# buffer layer)and the height of crown arc on wear resistance of tire through simulation analysis.According to the relevant laws obtained by the optimization analysis,the width of the 2# and 4# belts,the height of crown arc and the arrangement angles of the 2#,3# and4# belt layers are taken as the three factors of the test,design a three-factor and threelevel orthogonal test,and obtain the optimal combination of factors and levels after orthogonal test optimization: the width of the 2# belt is 210 mm,the width of the 4# belt is 166 mm,the height of crown arc is 8.8 mm and the arrangement angle of the 2#,3#and 4# belt layers is 22 °.Under free rolling working condition,compared with initial design tire,loadbearing performance of optimized design tire has been increased by 2.39 %,wear resistance has been increased by 2.66 %,and grip performance has been increased by0.69 %.At 3 ° sideslip and 5 ° camber working conditions,its grip performance has been increased by 0.58 % and 0.64 % respectively.Under overload and air-deficient working conditions,its load-bearing performance has been increased by 2.14 % and 1.92 %respectively.Under free rolling working condition,load-bearing performance of optimized design tire has been improved,wear resistance and grip performance of optimized design tire have been improved harmoniously.At 3 ° sideslip and 5 ° camber working conditions,its grip performance and driving safety have been improved.Under overload and airdeficient working conditions,its load-bearing performance has been improved.On the whole,the overall performance of optimized tire is better.