In-plane Vibration and Tire Force Transmissibility owing to Tire Non-uniformity Defects

摘要

Tire non-uniformities give rise to rolling force variation at the spindle during steady state rolling. These kinds of characteristics are to some extent unavoidable. Therefore, limiting and managing the non-uniformities is of great economic importance to tire manufacturers. In this paper, an analytical model for predicting the high-speed uniformity and the force transmissibility using low-speed uniformity data is presented. The model is established based on a three-dimensional ring on an elastic foundation model. Considering the tire mass unbalance and the non-uniformity of the geometry, the variations of the force on the tire-road contacting area and the length of the footprint are analyzed. The mass and the geometrical non-uniformities are transformed into generalized forces and the equilibrium equations are solved in the space coordinate system. The length of the footprint caused by the non-uniformities is expanded by Fourier series, and the deformation is integrated to obtain the variation of the axial force. The method provides a possibility for the diagnosis and evaluation of high-speed tire dynamic characteristics.