ON CONTACT-INDUCED STANDING WAVES IN ROTATING TIRES: EXPERIMENT AND THEORY

An experimental and theoretical study of standing waves in a rotating tire is presented. A test set-up for studying small balloon tires is described. Experimental observations of standing waves arising after a critical speed transition are presented, including measurements of the spatial structure of the standing waves. A simple model for the tire is developed, which has a single degree of freedom at each radial location. Steady state solutions at any rotation speed are governed by a non-linear boundary value problem, which is studied in detail. Appropriate boundary conditions are obtained using asymptotic arguments, and then used in numerical solutions. The analysis is shown to agree well with the experimental observations. Based on the analysis, a method for suppressing the standing waves is proposed and confirmed experimentally.

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