为提高负重轮的疲劳寿命 ,提出了一种双层橡胶轮缘的方案 .这种轮缘包括两层橡胶 ,内层橡胶加入了金属丝 ,外层橡胶不加金属丝 .用ANSYS软件对这种双层橡胶轮缘的应力应变和温度场进行了有限元分析 ,再用断裂力学理论估算了负重轮的疲劳寿命 .估算结果表明 ,负重轮采用双层橡胶轮缘结构可以减小发热 ,在不影响轮胎机械强度的前提下可以提高负重轮疲劳寿命 In order to improve the fatigue life of the load-bearing wheel, a double-layer rubber wheel rim is proposed, which comprises two layers of rubber, the inner rubber is added with metal wire and the outer rubber is without metal wire, The stress-strain and temperature field of double-layer rubber rims were analyzed by finite element method, and then the fatigue life of the load-bearing wheels was estimated by the theory of fracture mechanics. The estimation results show that the double-layer rubber wheel flanges can reduce the heat generation, Under the premise of not affecting the mechanical strength of the tire, the fatigue life of the road wheel can be increased