子午线轮胎扁平率与接地特性的关系

Relationship between Flatness Ratios and Ground Contact Characteristics of Radial Tire

以205/55 R16子午线轮胎为研究对象,改变轮胎横截面的宽度,分别建立扁平率为45%,50%,55%,60%和65%的轮胎有限元模型,利用Abaqus软件对不同垂向负荷和充气压力下5种扁平率轮胎进行静态接地特性(接地印痕和法向接触应力)分析。仿真结果表明:随着扁平率的增大,沿轮胎轴向的接地印痕宽度减小,沿轮胎滚动方向的接地印痕长度在扁平率为60%或65%时最大;扁平率对轮胎接地印痕面积的影响较大,扁平率越大,轮胎的法向接触应力分布越不均匀,翘曲现象越明显;相同扁平率的轮胎,垂向负荷越大,胎肩处的法向接触应力越大,而充气压力越大,胎面中部的法向接触应力越大。

Taking the 205/55 R16 radial tires as the research object,the finite element models of the tires with flatness rates of 45%,50%,55%,60% and 65% were established respectively,by adjustment of the width of the tire cross section. The static ground contact characteristics(footprint and normal contact stress)of the tires with 5 kinds of flatness ratios under different vertical loads and inflation pressures were analyzed by using Abaqus software. The simulation results showed that as the flatness ratio increased,the width of the footprint along the tire axis decreased,and the length of the footprint along the tire rolling direction was the largest when the flatness ratio was 60% or 65%. The flatness ratios had a great influence on the footprint areas of the tires. The larger the flatness ratio was,the more uneven the normal contact stress distribution of tire was,and the more obvious the warpage phenomenon was. For the tires with the same flatness ratio,the greater the vertical load was,the greater the normal contact stress at the shoulder was,and the greater the inflation pressure was,the greater the normal contact stress in the middle of the tread was.