PSI - Issue 17

Paulo Morais et al. / Procedia Structural Integrity 17 (2019) 419–426 Paulo Morais et al. / Structural Integrity Procedia 00 (2019) 000 – 000

423

5

frequency peaks associated with the structural frequencies of the dynamic system formed by vehicle and by railway line: Fs – frequency associated with the suspension of the vehicle; Ff – frequency associated with the rigidity of the railway line foundation; Fc – frequency associated with the interaction between the suspension and the railway line foundation. The results shown in these charts were obtained with varying vehicle's speed, having the last one been obtained a few moments before the vehicle stopped, as is proven by the absence of frequencies associated with vehicle speed. The data obtained provides evidence of railway line stiffness variations, as was intended.

Fig. 3. Data from site monitored at PK 63+472: Vehicle suspension vertical displacement channels (Channel naming example: DispFront_Left – Vertical displacement measured at the front shaft, left wheel).

Fig. 4. Data from site monitored at PK 63+472: Cabin vertical accelerometer channels (Channel naming example: AccFrontCabin_Z – Vertical acceleration measured at the front cabin).