The Influence of the Motor Traction Vibration on Fatigue Life of the Bogie Frame of the Metro Vehicle

Table 1

Modal analysis of FEM and EMA results.

FEA modal result		Test modal result		Error (%)	MAC	Modal shape
Modal order	Frequency (Hz)	Modal order	Frequency (Hz)
1	49.370	1	47.010	4.78	0.96	Whole shearing deformation
2	56.066	2	52.680	6.04	0.94	Whole twisting deformation
3	64.972	3	60.293	7.20	0.94	Side beam bending as “V” type
4	68.662	4	65.694	4.32	0.95	Side beam bending as “diamond” type
5	71.291	5	69.687	2.25	0.98	Side beam lateral bending on the reverse direction
6	78.885	6	73.072	7.37	0.96	Side beam lateral bending in the same direction
7	84.279	7	79.868	5.23	0.95	Side beam lateral bending in the same direction