NDLI: Experimental Evaluation of Nonlinear Dynamics and Coupled Motions in a Pantograph

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Poznic´, Pia Hare`ll Jerrelind, Jenny Drugge, Lars
Copyright Year	2009
Abstract	Continuous electric power supply, which is transferred from the contact wire to the train through a pantograph mechanism, is a necessity for a train to function satisfactory. Since various sources of nonlinearities are present, such as friction in the pantograph suspensions and impacts in the subsystems and at the excitation, there is a possibility of nonlinear dynamic behaviour. The aim of this work is to experimentally investigate the dynamic behaviour of a commercial pantograph to verify if nonlinear behaviour and coupling effects can occur. A test rig has been built that has the ability to simulate both the horizontal and vertical excitation generated by the contact wire. Measurements have been performed for sinusoidal input signals both in horizontal and vertical directions. Harmonic and subharmonic motions as well as irregular behaviour are shown to exist in the system. The results show that the pantograph’s rotational degree of freedom, friction in the suspension systems and the nonlinear stiffness play an important role for the dynamic behaviour of the system and are therefore crucial to include when creating mathematical models of the system.
Sponsorship	Design Engineering Division and Computers in Engineering Division
Starting Page	619
Ending Page	626
Page Count	8
File Format	PDF
ISBN	9780791848982
DOI	10.1115/DETC2009-87246
e-ISBN	9780791838563
Volume Number	Volume 1: 22nd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
Conference Proceedings	ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Language	English
Publisher Date	2009-08-30
Publisher Place	San Diego, California, USA
Access Restriction	Subscribed
Subject Keyword	Trains Nonlinear dynamics Degrees of freedom Suspension systems Friction Stiffness Excitation Signals Wire Electricity (physics)
Content Type	Text
Resource Type	Article

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