Study on Static Stiffness Characteristics and Influencing Factors of Radial Pneumatic Tire with Complex Tread Patterns by Computer Simulation Method

To study the static stiffness characteristics of radial pneumatic tire with complex tread patterns, a numerical simulation model of radial pneumatic tire is established based on the finite element method (FEM), and its accuracy is verified by the outer contour experiment and grounding experiment. The influence of different inflation pressure and cord angle on the radial stiffness of the tire, and the response of the lateral stiffness and longitudinal stiffness of the tire when the pressure and load change are analyzed. The results show that the relationship between tire pressure and radial stiffness is approximately cubic polynomial, and the increase of tire radial stiffness at high pressure is greater than that at low pressure. The increase of air pressure will increase the lateral stiffness of the tire, but the increase is not large. Before the relative slip between the tire and the road surface, the load has little effect on the lateral stiffness and longitudinal stiffness. The research results provide a basis for the structural design of radial tire.