Vibro-acoustic evaluation of a light rail vehicle
Andrzej Chudzikiewicz , Anna Stelmach , Wojciech Wawrzyński , Bartosz Firlik , Bartosz Czechyra
AbstractConsiderations pertaining to a comparison of vibro-acoustic properties of two light rail vehicles operated under conditions of underground municipal traffic are presented. The selected vehicles were tested with respect to the scope of vibro-acoustic activity, which results directly from dynamics of the vehicle in macro-, mezzo- and micro-scale. The tests included measurement of vibration (accelerations) at selected spots on the vehicle and recording of an acoustic signal over the full acoustic band. Besides, during the tests, an image of mating of the wheel with the rail was recorded by means of a high-speed camera in order to evaluate intensity and kind of contact between the wheel flange and the rail in the case of both vehicles. Only results of recording and analysis of acoustic signals as well as images of mating of the wheel with the rail are presented. Analysis of the results will make it possible to draw conclusions with regard to behavior of the vehicles under harsh operational conditions, which exist in roundhouses and storage – maintenance stations. Specific character of these conditions is related to tracks with arcs of small radius, of about few tens of meters as well as crossovers of similar arc radiuses. As evidenced by numerous situations, derailments do happen on these tracks, and they result in several hours long stoppages in operation of these units. It should be mentioned that the relevant literature very seldom features works related to the track infrastructure in roundhouses and storage – maintenance stations.
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|Book||Vogiatzis Konstantinos, Kouroussis Georges, Crocker Malcolm, Pawelczyk Marek (eds.): From Ancient to Modern Acoustics, 2016, International Institute of Acoustics and Vibration, ISBN 978-960-99226-2-3|
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