Title: Analytical modelling and experimental verification of tyre non-uniformity

Authors: Brian L. Dillinger, Nader Jalili, Imtiaz Ul Haque

Addresses: Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921, USA. ' Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921, USA. ' Department of Mechanical Engineering, Clemson University, Clemson, SC 29634-0921, USA

Abstract: This paper presents the development of a non-uniform tyre model for system identification to fit experimental High-Speed Uniformity (HSU) measurements, which ultimately results in the determination of the tangential and radial hub forces. The analytical model includes the mass imbalance, stiffness non-uniformity, and radial run-out in addition to hysteretic energy dissipation and a longitudinal slip model. The system identification, based on a genetic algorithm, uses the experimental tangential and radial first harmonic wheel hub force variations as the target outputs. The results demonstrate that non-uniformities produce wheel hub forces at multiple combination frequencies of the first harmonic frequency.

Keywords: genetic algorithms; GAs; high-speed uniformity; HSU; hysteresis; longitudinal tyre slip; mass imbalance; radial run-out; stiffness non-uniformity; system identification; tyre modelling; non-uniform tyres; viscoelasticity; ride quality; vehicle design.

DOI: 10.1504/IJVD.2008.017067

International Journal of Vehicle Design, 2008 Vol.46 No.1, pp.1 - 22

Published online: 06 Feb 2008 *

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