Damage Degree Detection of Cracks in a Locomotive Gear Transmission System

Table 6

Indicators of the vertical acceleration of car body vibration under each damage states.

	0 mm	0.5 mm	1 mm	1.5 mm	2 mm	2.5 mm	3 mm	3.5 mm	4 mm	4.5 mm	5 mm
Kurtosis	1.5097	1.5102	1.5131	1.5204	1.5345	1.5569	1.5898	1.6333	1.6893	1.7553	1.8268
FM4	1.5002	1.5002	1.5003	1.5006	1.5012	1.5021	1.5036	1.5056	1.5084	1.5120	1.5165
rms	6.72e − 4	6.72e − 4	6.72e − 4	6.73e − 4	6.74e − 4	6.76e − 4	6.80e − 4	6.85e − 4	6.92e − 4	7.01e − 4	7.12e − 4
Sα	1.6521	1.6525	1.6549	1.6614	1.6737	1.6931	1.7217	1.7606	1.8130	1.8792	1.9558
Sr	1.2033	1.2035	1.2043	1.2065	1.2108	1.2175	1.2275	1.2407	1.2578	1.2781	1.3003