Theoretical prediction of the damping of a railway wheel with sandwich-type dampers |
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Authors: | Inaki Merideno Javier Nieto Nere Gil-Negrete José Germán Giménez Ortiz Aitor Landaberea Jon Iartza |
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Institution: | 1. CEIT, Manuel de Lardizabal 15, 20018 San Sebastián, Spain;2. Tecnun-University of Navarra, Manuel de Lardizabal 13, 20018 San Sebastián, Spain;3. CAF, S.A., J.M. Iturrioz 26, 20200 Beasain, Spain |
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Abstract: | This paper presents a procedure for predicting the damping added to a railway wheel when sandwich-type dampers are installed. Although there are different ways to reduce the noise generated by a railway wheel, most devices are based on the mechanism of increasing wheel damping. This is why modal damping ratios are a clear indicator of the efficiency of the damping device and essential when a vibro-acoustic study of a railway wheel is carried out. Based on a number of output variables extracted from the wheel and damper models, the strategy explained herein provides the final damping ratios of the damped wheel. Several different configurations are designed and experimentally tested. Theoretical and experimental results agree adequately, and it is demonstrated that this procedure is a good tool for qualitative comparison between different solutions in the design stages. |
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