Abstract
In this study, an experimental method is proposed to measure rail properties in discretely supported tracks. The variations in the dynamic characteristics of the rail pad according to the excitation were estimated. To simulate the equivalent stiffness of the fastening system due to the single fast clip (SFC) device and the rail pad, a modeling of the clamping system was proposed. The discretely supported track was analyzed using the transfer function method. The vibration responses of the track were analyzed to determine the transfer function. As the length of the track increases, the influence of the reflected wave from the joints decreases, and the traveling wave effect becomes dominant. The characteristics of the infinite track were observed. A model with 36.5 m (50 sleepers) railway track was applied to predict the equivalent properties of the rail on discrete supports for each frequency using Newton-raphson method.
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