Authors: James R. Allen
Addresses: Applied Research Laboratory, The Pennsylvania State University, University Park, PA 16801, USA ' Department of Automotive, Mechanical and Manufacturing Engineering, Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe St. North, Oshawa, Ontario, L1H 7K4, Canada
Abstract: This paper describes the development and integration of an advanced effective road profile filter with an in-plane rigid ring tyre quarter-vehicle model. This novel fully integrated model improves upon the standard twin-cam effective road profile filter developed by taking into account the effects of vertical loading on tyre deflection and contact length; the model developed herein is said to be a force-dependent effective road profile (FDERP) rigid ring quarter-vehicle model (RRQVM) because the effective road shape parameters are treated as functions of the vertical contact force at each integration time step. The model is capable of simulating the dynamic response of a free rolling tyre over arbitrarily uneven road surfaces. The RRQVM is validated with tyre spindle vertical acceleration data from virtual finite element analysis (FEA) quarter-vehicle model (QVM) tests. A baseline in-plane RRQVM with a standard - force-independent effective road profile (FIERP) - twin-cam effective road profile filter is also developed for comparison with the FDERP RRQVM. Results for a described durability test event show that the FDERP RRQVM predicts the vertical tyre spindle acceleration more accurately than the FIERP RRQVM.
Keywords: tyre modelling; tyre mechanics; road profile filter; tyre traction; uneven road surfaces; finite element analysis; FEA; quarter vehicle models; rigid ring models; profile smoothing algorithm; modelling; vertical loading; tyre deflection; contact length; vertical tyre spindle acceleration; simulation.
International Journal of Vehicle Performance, 2013 Vol.1 No.1, pp.28 - 48
Accepted: 13 Sep 2012
Published online: 21 Nov 2013 *