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Materiale Plastice
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https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice (Mater. Plast.), Year 2009, Volume 46, Issue 2,





Polidor Bratu Experimental Evaluation of the Antivibrating Damping Capacity in Case of Elastomers used for Tram Railway Supporting


Abstract:
This paper is focused on the main static and dynamic characteristics in case of rubber elements designated to damp the vibrations transmitted to the surrounding buildings by means of the railway. Thus, the experimental methods performed on a stand having harmonic excitation in case of actual loading under dynamic regime both stationary and transient attaining the resonance point are presented. Based on this, the system dynamic parameters such as: dynamic rigidity, critical damping fraction, dissipation coefficient (hysteresis) can be determined. Aiming this the free damped vibration method and the controlled excitation method with monotone increasing variation for the excitation frequency have been used. In this way can comparatively be determined both the rigidity and the damping dynamic characteristics of the rubber for various manufacturing receipts taking into account the chemical composition as well as the manufacturing process. Finally, the paper presents experimental results obtained by our research institute ICECON Bucharest in cooperation with University “Dunărea de Jos” of Galaţi during the works carried out for the tram rails in Bucharest, Romania. Keywords: elastomer, rigidity, damping, vibration, structural noise, antivibrating insulation



Issue: 2009 Volume 46, Issue 2
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