Dynamic impact measurements on crossings, in free floating and in-situ conditions.

August 17, 2014 in

Conference Paper

Anthonie Boogaard

Arend Schwab, Zili Li


ASME 2014 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
Year: 2014
Location: Buffalo, NY


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As vibration based condition monitoring requires a good understanding of the dynamic behaviour of the structure, a good model is needed. At the TU Delft a train borne monitoring system is being developed which currently focusses on crossings. Crossings are prone to very fast degradation due to impact loading. In this paper a finite element model of a free floating frog is presented and validated up to a 100 Hz using dynamic impact measurements. The mode shapes of the free floating frog are then also compared to some preliminary results from an in-situ test. This comparison shows that the in-situ frequencies can be up to twice the free floating frequency.