Abstract: In order to effectively improve the service performance of retreaded tire, the load-bearing deformation characteristics of 12R22.5 retreaded tire were analyzed by finite element simulation using ANSYS software, and the load-bearing deformation characteristics of retreaded tire were studied by using the load-bearing deformation test system. The variation law of load-bearing characteristics such as radial deformation, lateral deformation, grounding shape and grounding area of retreaded tires and new tires of the same type were obtained under various working conditions with tire pressure of 530~830 kPa and radial load of 10~35 kN. By use of the principle of multiple linear regression, a mathematical model calculation formula for the load-bearing radial deformation of retreaded tires was proposed, and the differences and causes of load-bearing deformation characteristics and grounding area characteristics between retreaded tire and new tire were compared and analyzed. The research results show that the load-bearing deformation characteristics of retreaded tires are consistent with those of new tires of the same type, and there are also some differences. When the tire pressure is constant, the radial deformation, lateral deformation and grounding area of retreaded tire and new tire increase with the increase of radial load. The increasing trend of deformation is approximately linear, and the increasing trend of grounding area is approximately nonlinear. Under the same tire pressure and radial load conditions, the radial deformation, lateral deformation and grounding area of retreaded tires are smaller than those of new tires of the same type. Under the working condition of constant tire pressure and low load, the radial stiffness of retreaded tire is close to that of new tire. Under the working condition of constant tire pressure and high load, the radial stiffness of retreaded tire is greater than that of new tire, and the radial stiffness difference becomes larger and larger with the increasing load. The worse the load-bearing deformation characteristics of the retreaded tire, and the shorter the remaining service life of the retreaded tire.

Key words: vehicle engineering; retreaded tire; load-bearing deformation characteristics; radial deformation; lateral deformation; grounding area; rubber aging

摘要： 为了有效提高翻新轮胎的使用性能，利用ANSYS软件对12R22.5翻新轮胎承载变形特性进行了有限元仿真分析，并利用承载变形试验系统对翻新轮胎承载变形特性进行了试验研究，获得了胎压为530～830 kPa、径向载荷为10～35 kN多种工况下的翻新轮胎和同型号新轮胎的径向变形、侧向变形、接地形状及接地面积等承载特性变化规律；利用多元线性回归原理，提出了翻新轮胎承载径向变形数学模型计算公式，并对比分析了翻新轮胎与新轮胎的承载变形特性、接地面积特性的差异性及成因。研究结果表明：翻新轮胎与同型号新轮胎承载变形特性变化规律存在一定的差异性；当胎压一定时，翻新轮胎及新轮胎径向变形、侧向变形及接地面积均随着径向载荷的增加增大，其中变形增大趋势近似线性规律，接地面积增大趋势近似非线性规律；在相同胎压及径向载荷工况下，翻新轮胎的径向变形、侧向变形及接地面积均比同型号新轮胎小；在胎压一定、低载工况下，翻新轮胎的径向刚度和新轮胎径向刚度相近；在胎压一定、高载工况下，翻新轮胎径向刚度比新轮胎径向刚度大，且随着载荷的不断加大，径向刚度差异性越来越大；即废旧轮胎胎体橡胶老化程度越严重，其翻新后的轮胎承载变形特性越差，翻新轮胎剩余使用寿命将会越短。

关键词: 车辆工程；翻新轮胎；承载变形特性；径向变形；侧向变形；接地面积；橡胶老化