Title: Effects of non-linear modelling of a hydromount in full vehicle simulation

Authors: Johannes Vilsecker, Werner Mack, Anton Falkner, Robert Hanfstingl

Addresses: Institute of Mechanics and Mechatronics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria. ' Institute of Mechanics and Mechatronics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria. ' MAGNA STEYR Fahrzeugtechnik, Liebenauer Hauptstrasse 317, A-8041 Graz, Austria. ' MAGNA STEYR Fahrzeugtechnik, Liebenauer Hauptstrasse 317, A-8041 Graz, Austria

Abstract: The effects of different levels of model complexity for a hydromount in full vehicle simulation are investigated. In particular, the performances of the classical Kelvin-Voigt model, a standard linear lumped parameter (lever) model and an amplitude-dependent non-linear physical model with respect to their predictive capabilities are studied; thereby special attention is paid to the step from a linear to a non-linear model. The evaluation is based on comparisons with test results for crossing a single obstacle, driving on a motorway and on a rough road, respectively. Assessments in the time domain as well as by statistical means show that the non-linear model is capable of capturing high-amplitude oscillations more precisely, but that the overall differences between the simulation results are not very pronounced.

Keywords: hydromounts; nonlinear modelling; physical modelling; amplitude dependence; full vehicle simulation; road excited vibrations; linear lumped parameter models; motorway driving; rough roads; model complexity; vehicle vibration; high amplitude oscillations.

DOI: 10.1504/IJVNV.2011.040570

International Journal of Vehicle Noise and Vibration, 2011 Vol.7 No.2, pp.109 - 128

Available online: 07 Jun 2011 *

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