Experimental and Numerical Investigation into Formation of Metro Wheel Polygonalization

Figure 6

Frequency spectral of the vertical axlebox accelerations on different types of tracks (T-1 for monolithic concrete bed with DTVI2 fasteners, T-2 for monolithic concrete bed with compression-type fasteners, T-3 for low-weight floating slab track, and T-4 for floating slab track with high weight).