Title: Study of torsional vibrations in the powertrain of diesel locomotive during manoeuvring by means of a multi-body model

Authors: Andrea Collina; Luigi Prone; Emanuele Ruspini; Edoardo Sabbioni

Addresses: Department of Mechanical Engineering, Politecnico di Milano, 20158 Milano, Italy ' FIREMA Trasporti S.p.A. Via Triboniano 220, 20156 Milano, Italy ' Department of Mechanical Engineering, Politecnico di Milano, 20158 Milano, Italy ' Department of Mechanical Engineering, Politecnico di Milano, 20158 Milano, Italy

Abstract: Torsional oscillations in the driveline of heavy-duty locomotives, equipped with mechanically interconnected axles, are analysed in this paper. In order to reproduce the experimentally observed behaviour, a multi-body vehicle model has been implemented taking into account torsional deformability of the driveline and of the wheelsets. An extension of the Shen-Hedrick-Elkins model, based on a temperature dependent friction coefficient, is proposed for reproducing the negative slope of the creep force-creep curve experimentally measured at high creepages, occurring during manoeuvres at adhesion limit. The proposed contact model enables to reproduce the torque oscillations in the driveline during manoeuvres at adhesion limit.

Keywords: diesel locomotives; wheel-rail contact; thermal effects; torsional vibrations; multi-body simulation; temperature; friction coefficient; creep force; creep curve; contact modelling; powertrains; heavy vehicles; modelling; multi-body vehicles; torsional deformation; deformability; driveline; wheelsets; railways.

DOI: 10.1504/IJHVS.2013.053008

International Journal of Heavy Vehicle Systems, 2013 Vol.20 No.2, pp.120 - 143

Available online: 26 Mar 2013 *

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