engleski

Numerical analysis of the rail fastening spring clip type SKL-1

The spring clip is an element of the rail track accessories intended for elastic fastening of the rail to the base. The most important requirement expected from the spring clip is to be in the constant contact with the rail in any condition which might occur during the exploitation. Spring clips type SKL-1, which are the subject of the research described in this paper are used for both railway and tramway tracks. The application of the elastic fastening is especially important for tracks mounted on concrete slippers or concrete base, which is the case for tramway tracks in Zagreb, where this clip is used as the part of the fastening system type DEPP, Fig. 1. During supervision of works for construction and reconstruction of tram tracks in Zagreb town, it was noted that these SKL 1 clips were broken. Breaking of the clip in some cases happened even during the assembly (mainly due to faults in production) and also during the exploitation phase. That caused first experimental testing, followed by numerical analysis, to discover reasons for breakage. For the numerical analysis a three-dimensional static model of the clip was prepared, with the aim to obtain better view of the spatial stresses on the clip, both during the assembly phase and in exploitation. By modelling the clip and by numerical analysis not only can one see the spatial stress and deformation, but also locate the critical places where the critical stress appears and the loading of the clip can be checked.

tram track; fastening system; spring clip type SKL-1; finite element method

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