Abstract: Take TBR tire 385/55R22.5 as the research object, combining the structure design theories of radial tire. Make comparative analysis of rolling resistance as well as energy loss in various parts of the tires with different structural design by numerical simulation method. Make a study on the relationship between ground-pressure characteristic parameters and the rolling resistance. The results show that, tire structural parameters have significant influences on the rolling resistance, and the inner contour is particularly significant; Rolling resistance performance of the tires with 4-layer belt structure is better than that which has “3+0º” belt structure; Ground contact area, imprint areas, average ground pressure, ground pressure skewness values, hardness coefficient, rolling radius are highly associated with rolling resistance, and each one shows a strong linear relationship with rolling resistance; Ground contact areas as well as imprint areas is negatively related with rolling resistance, the others are positively correlated; Ground contact area and hardness coefficient have more significant influences on the rolling resistance than other characteristic parameters. The linear equation of rolling resistance and grounding characteristic parameters is established by principal component regression method, which have a high value in engineering.

Key words: radial tire;rolling resistance;ground-pressure characteristics;principal component regression;finite element analysis