PSI - Issue 24

Nicola Bosso et al. / Procedia Structural Integrity 24 (2019) 680–691 N. Bosso et al./ Structural Integrity Procedia 00 (2019) 000–000

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Faiveley (2010). Fig. 2 shows a layout of the vehicle composed of 6 coaches for a total number of 16 wheelsets, identified by the letters of the alphabet from A to P. The vehicle has the possibility of movement in both directions and the numbers 1 and 2 indicate the running direction. On the other hand, analyzing the type of braking system installed, we highlight the following differences compared to the ETR 1000:  On the driving wheelsets (axes A, B, G, H, O, P shown in black) there is the simultaneous presence of the contribution of the electropneumatic EP and ED electrodynamic brake;  On the second (O) and second-to-last (P) wheelset the vehicle is equipped with the EP electro-pneumatic brake, ED electrodynamic brake and the DB brake;  Two sanding systems on the A and P wheelsets.

Fig. 2. Architecture and layout of the Règiolis train.

The axle-load is of 20 tons approximately. As for traction, the Régiolis has two versions: electric or dual mode (with voltage at 25 kV or 1500 V). The vehicle composition is as follows:

 3 motor bogies;  1 trailed bogie;  4 trailed Jakobs’ type bogies.

The experimental data, analyzed in this work, were acquired during on track tests of the train WSP system. Also, in this case the data is acquired by means of a control unit installed on the vehicle coach. Unlike the previous train, it is specified that in this test session the conditions of degraded adhesion are reproduced not only with soap, but also with oil. In this regard it should be noted that, like the tests on the ETR 1000, the soap is injected near the leading wheelset between the wheel and the rail. Fig. 3 shows a picture of system used to spread the soap on the rail. As regards the adhesion tests with oil contamination, they are not carried out by injection of contaminant, but simply by dirtying a specific section of the rail on which the train will subsequently run (contaminated section of track between a minimum of 20 to a maximum of 500 m, with a minimum braking speed of 100 km/h).