Title: Vibration and tyre force transmissibility of commercial vehicles owing to wheel unbalance and non-uniformity defects

Authors: Aniket Deodhar, Subhash Rakheja, Rama B. Bhat

Addresses: Department of Mechanical and Industrial Engineering, CONCAVE Research Center, Concordia University, Montreal, Quebec, H3G 1M8, Canada. ' Department of Mechanical and Industrial Engineering, CONCAVE Research Center, Concordia University, Montreal, Quebec, H3G 1M8, Canada. ' Department of Mechanical and Industrial Engineering, CONCAVE Research Center, Concordia University, Montreal, Quebec, H3G 1M8, Canada

Abstract: Dynamic responses of a two-axle truck to self-excitations arising from wheel defects, namely the wheel unbalance and radial run-out are investigated. Dynamic tyre forces are determined using an adaptive footprint tyre model that could incorporate both types of wheel defects. The influences of wheel unbalance and non-uniformity are derived in terms of unweighted and frequency weighted vertical and pitch accelerations, and dynamic tyre loads, as functions of magnitudes of wheel defects in conjunction with variations in speed and road roughness. The dynamic responses show the most significant effects of both wheel defects under smooth-road excitations, and could thus contribute significantly to ride discomfort. The relative effects of wheel unbalance tend to diminish under excitations arising from rough roads.

Keywords: tyre forces; wheel defects; commercial vehicles; vibration; adaptive footprint tyre models; wheel unbalance; tyre non-uniformity; in-plane vehicle model; random road excitations; parameter sensitivity analysis.

DOI: 10.1504/IJHVS.2006.010019

International Journal of Heavy Vehicle Systems, 2006 Vol.13 No.3, pp.212 - 240

Published online: 08 Jun 2006 *

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