Title: High frequency modelling and validation of railway dampers

Authors: A. Sañudo; J. Nieto; J. Pérez; A. Alonso

Addresses: CEIT, Manuel de Lardizábal 15, San Sebastián 20018, Spain ' CEIT, Manuel de Lardizábal 15, San Sebastián 20018, Spain ' CAF, S.A. J.M. Iturrioz 26, Beasain 20200, Spain ' CEIT, Manuel de Lardizábal 15, San Sebastián 20018, Spain Tecnun, University of Navarra, Manuel de Lardizábal 15, San Sebastián 20018, Spain

Abstract: This paper presents and validates an appropriate physical damper model to predict the dynamic behaviour of a railway damper for frequencies of up to 200 Hz. The model is computationally efficient and, therefore, appropriate for implementation in NVH-CAE models used to study the transmission of vibration paths to the train body. The model parameters are related to the physical characteristics of the damper (volume of the chambers, piston rod sections, characteristics of the valves, etc.). However, it is shown that in the absence of internal constructive information, which is most often the case, the model parameters can be fitted from a few tests carried out at low frequency (0-20 Hz), based on its theoretical background.

Keywords: railway dampers; high frequency modelling; validation; NVH; vehicle noise; vehicle vibration; harshness; transmission paths; damper models; train body vibration; vibration damping; dynamic modelling.

DOI: 10.1504/IJHVS.2013.056911

International Journal of Heavy Vehicle Systems, 2013 Vol.20 No.4, pp.312 - 326

Received: 08 May 2021
Accepted: 12 May 2021

Published online: 30 Sep 2013 *

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