Title: Investigation of drivetrain dynamics on low-μ ground using the brush model

Authors: Jianing Yang; Georg Jacobs; Achim Kramer

Addresses: Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Schinkelstrasse 10, 52062, Aachen, Germany ' Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Schinkelstrasse 10, 52062, Aachen, Germany ' Institute for Machine Elements and Systems Engineering, RWTH Aachen University, Schinkelstrasse 10, 52062, Aachen, Germany

Abstract: This paper aims to investigate the influence of the low-friction ground on off-highway drivetrain dynamics. A comprehensive vehicle simulation model is established for this purpose. This vehicle model consists of three parts: the torsional drivetrain model, the vehicle body model of longitudinal dynamics and the tyre model with slip behaviour. To correctly reflect tyre slip behaviour, the brush model, which features a physical description of the tyre-ground contact patch, is applied. A group of simulations is carried out on the complete vehicle model, mainly from two perspectives: drivetrain eigen-modes and drivetrain transient response. For the drivetrain eigen-mode analysis, different tyre slip states and the transition process between these two states are taken into consideration. For the drivetrain transient response, the vehicle is assumed to drive over a patch of low-μ ground. The drivetrain oscillation is analysed, and factors such as driving speed and low-μ ground length are investigated.

Keywords: low-μ ground; tyre slip model; brush model; torsional drivetrain model; drivetrain eigen-modes; drivetrain transient response.

DOI: 10.1504/IJVD.2024.136237

International Journal of Vehicle Design, 2024 Vol.94 No.1/2, pp.123 - 149

Accepted: 15 Sep 2021
Published online: 23 Jan 2024 *