Citation

Russev RG, Nhu DT, Todorov TI, Petrov IL. Heavy Vehicle Syst. 1995; 2(3-4): 270-284.

Affiliation

Technical University of Rousse, Rousse, Bulgaria

Copyright

(Copyright © 1995, Inderscience Publishers)

DOI

unavailable

PMID

unavailable

Abstract

This paper describes a theoretical and experimental study of an agricultural tractor subject to harmonic excitations, and the effects of such a road input on the tractive performance and the lateral stability of a tractor. The tractor is represented by a two-degree-of-freedom model for evaluation of the vertical displacement of the wheels. Two nonlinear models are used to describe the longitudinal wheelslip and side slip angles. A hydraulic driven exciter mounted on the rear part of the tractor is used to simulate the harmonic input. Under these conditions a tractor fitted with pneumatic tyres was tested and the vibrations of the wheel and wheelslip were measured. It is shown that the variable normal road reaction exerts a negative effect on the tractive performances of the tractor, and that this should be taken into account when predicting and analysing the dynamic characteristics of the tractors.