RTR 4/2010 10 n Frequencies of the ballasted track Fig. 9: 2nd plane mode of the unloaded track, belonging to the second eigenfrequency of 81.7 Hz. Track section 1300 cm long. Fig. 8: 1st plane mode of the unloaded track, belonging to the smallest eigenfrequency of 81.5 Hz. Track section 1300 cm long. Fig. 10-1: Essential modes of the unloaded, ballasted track-system. Track section 1300 cm long. Stützpunktabstände = Support distances [cm]
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