Modeling the vibrational response of truck tyres

Paper in proceeding, 2006

When modelling structures, one key question is to have access to proper input data. In the case of tyres this is a very complicated task having in mind the complex design of the structure. In addition the data might be load and temperature depended as well as varying with frequency. Obtaining data on a detailed level (i.e. for individual cords, wires, rubber compounds) is not sufficient since, models (e.g. Finite Element Models) on this level will be computational very costly in the frequency range of interest (in our case up to 4kHz). In addition the detailed structure is not of importance for wave propagation in this frequency range. Instead global material data are needed. In this paper measurements are presented which help model and to identify key parameters such as bending stiffness, pre-stress, and damping. The measurements are carried out at a freely suspended truck tyre with a slick tread. The response in normal direction to the surface is measured on the tread surface and on the sidewall. From these measurements animations can be created enlightening the vibrational behaviour of the tyre. From the measurements conclusions can be made on the different types of propagating waves, their speed and attenuation. The extracted material data are applied in a model for truck tyres.