Abstract: In order to study the influence of tread ground deformation parameters on tire noise and grip performance, 10 PCR tires with the same type but different tread patterns were selected as the research objects. The deformation characteristic parameters of tire contact area under rated load were obtained through VIC-3D full field non-contact strain test. Through the correlation analysis, the ground deformation characteristic parameters with high correlation with tire noise and grip performance were selected, and a Kriging approximate model was constructed by ISIGHT software to quantitatively analyze the relationship between high correlation parameters and performance. The results showed that the noise performance of the tire had a high positive correlation with the radial deformation of the tread, and the grip performance was mainly positively correlated with the x-direction strain and was mainly negatively correlated with the y-direction strain. The tread area which had a greater impact on the tire noise performance was the central area, followed by the outer transition area, inner transition area, outer shoulder area and inner tire area which the weight values were 0.843, 0.576, 0.522, 0.149 and 0.087 respectively; the tread area with greater impact on the tire grip performance was the outer shoulder area, followed by the outer transition area, inner transition area, central area and inner shoulder area which the weight values were 0.587, 0.487, 0.354, 0.311 and 0.286 respectively.

Key words: PCR tires, ground deformation characteristics, correlation analysis, noise performance, grip performance