Floating floors are used in many different kinds of vehicles, for example in aircraft, ships and trains, as a noise- and vibration-reducing measure. Several studies of the dynamic properties have been made, especially on floating floors used in ships, concluding that a floating floor can be very effective if installed properly. Floating floors for use in trains are however slightly different from those used in ships and there are very few studies published on this particular application. There is a pronounced need for more knowledge about floating floors for use in trains concerning typical vibration data on floating floors installed in existing trains as well as better understanding of the principles of floating floors. The paper presents the results of vibration analysis of floating floors for use in trains. Laboratory measurements on a full scale floating floor were carried out as well as on-track measurements. A finite element model was also developed to study the vibration isolation of floating floors. The influence of a number of design parameters on the achieved vibration isolation is discussed and results from on-track measurements, laboratory measurements and simulations are presented. Simulations indicate that the acceleration level can be increased up to 20 dB due to local floor resonance in the area where the contact is lost. Additional modelling strategies are also investigated to further improve the agreement between simulated and measured results.
Vibration isolation of floating floors - measurements and simulations
Schwingungsdämpfung durch schwimmende Fußbodenbeläge - Messungen und Simulationen
International Congress on Sound and Vibration, 7 ; 3035-3045
2000
8 Seiten, 6 Bilder, 8 Quellen
Conference paper
English
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