High-Frequency Vibration Analysis and Optimization of Irregular Wear of Pantograph Carbon Strips

Table 4

Comparison of experimental and simulated vertical modal frequencies.

Mode	Simulation (Hz)	Laboratory test (Hz)	Discrepancy (%)
First	65.9	63.7	3.4
Second	139.8	137.5	1.7
Third	241.6	236.5	2.1
Fourth	389.1	386.7	0.6
Fifth	588.9	582.9	1.0
Sixth	810.7	807.3	0.4