Mode Selection Model for Rail Crack Detection Based on Ultrasonic Guided Waves

Table 1

Modal vibration factor W₁.

Frequency (Hz)	Mode no.	W1
60,000	2	1
60,000	1	1
50,000	2	0.99
50,000	1	0.99
40,000	2	0.99
40,000	1	0.98
30,000	2	0.98
30,000	1	0.97
20,000	2	0.97
20,000	1	0.96
60,000	11	0.95
50,000	11	0.93
20,000	12	0.92
40,000	10	0.90
30,000	10	0.86
60,000	31	0.86
50,000	5	0.85
30,000	4	0.85
30,000	7	0.84
40,000	4	0.84