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Identification of the Running‐State of Railway Wheelsets
Author(s) -
Reicke L.,
Popp K.
Publication year - 2005
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.200510233
Subject(s) - chassis , axle , vibration , transient (computer programming) , train , structural engineering , engineering , torque , track (disk drive) , acceleration , computer science , state (computer science) , automotive engineering , acoustics , mechanical engineering , physics , algorithm , classical mechanics , cartography , thermodynamics , geography , operating system
High‐speed trains require a reliable monitoring of the current running‐state to detect exceptional running‐conditions which can occur due to track irregularities, wear in the wheel‐rail contact or chassis damages. A sophisticated monitoring not only classifies the running‐state in terms of safe operation but also derives the causes to enable condition‐based maintenance. The running‐state can be characterized by the dynamic interaction in the contact patch inducing forces and torques and leading to forced and self‐excited structural vibrations of the wheelset. It is very difficult to measure structural vibrations directly and therefore it is convenient to observe them by accelerations in longitudinal, transversal and vertical direction at the left and right axle‐boxes of each wheelset. The transient behavior of structural vibrations can be well analyzed by timefrequency transforms. A decomposition into the principal eigenmodes is achieved by model‐based preprocessing. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)