Shape of a spectral excitation matrix for a linear road/tyre interaction numerical analysis
Shape of a spectral excitation matrix for a linear road/tyre interaction numerical analysis
Tyre/road interaction is recognised as the main source of interior and exterior
noise in vehicles at velocities over 40 km/h. Previously, the authors proposed
a linear stochastic approach to predict the tyre vibrations due to the road/tyre
interaction. A mechanical model of the tyre was connected to the road through
a series of parallel springs (Winkler model) assumed to be in contact with the
road at all the time. Such a linear model is only strictly valid for smooth road
and soft tyres. In this paper, the range of validity of the linearity assumption
is investigated and, a modified shape of the excitation matrix, that takes into
account the contact nonlinearity, is proposed. The investigation is based on a
2D numerical nonlinear model of the tyre/road contact so that the displacements
of the contact springs can be used to evaluate the nonlinear excitation
matrix. An approximated nonlinear excitation spectrum has been proposed
and his validity has been checked on a 2D linear tyre model.
Institute of Sound and Vibration Research, University of Southampton
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
March 2009
Rustighi, Emiliano
9544ced4-5057-4491-a45c-643873dfed96
Elliott, Stephen J.
721dc55c-8c3e-4895-b9c4-82f62abd3567
Rustighi, Emiliano and Elliott, Stephen J.
(2009)
Shape of a spectral excitation matrix for a linear road/tyre interaction numerical analysis
(ISVR Technical Memoranda, 985)
Southampton, GB.
Institute of Sound and Vibration Research, University of Southampton
Record type:
Monograph
(Working Paper)
Abstract
Tyre/road interaction is recognised as the main source of interior and exterior
noise in vehicles at velocities over 40 km/h. Previously, the authors proposed
a linear stochastic approach to predict the tyre vibrations due to the road/tyre
interaction. A mechanical model of the tyre was connected to the road through
a series of parallel springs (Winkler model) assumed to be in contact with the
road at all the time. Such a linear model is only strictly valid for smooth road
and soft tyres. In this paper, the range of validity of the linearity assumption
is investigated and, a modified shape of the excitation matrix, that takes into
account the contact nonlinearity, is proposed. The investigation is based on a
2D numerical nonlinear model of the tyre/road contact so that the displacements
of the contact springs can be used to evaluate the nonlinear excitation
matrix. An approximated nonlinear excitation spectrum has been proposed
and his validity has been checked on a 2D linear tyre model.
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Published date: March 2009
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Local EPrints ID: 146823
URI: http://eprints.soton.ac.uk/id/eprint/146823
PURE UUID: 24c4ba3f-7e87-4d97-b9d7-a7a62d5e45c5
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Date deposited: 22 Apr 2010 14:09
Last modified: 14 Mar 2024 00:56
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