Risk Evaluation of Bogie System Based on Extension Theory and Entropy Weight Method

Table 2

Four groups of sample data.

Evaluation index	Sample 1	Sample 2	Sample 3	Sample 4
Effective value	0.0644	0.0741	0.0917	0.0566
Peak factor	3.2241	3.3622	3.5621	3.3541
Kurtosis	2.7301	2.9901	2.7782	3.0803
Wheel diameter	791.5	786.2	782.3	782.9
Wheel rim width	31.6	29.1	27.2	27.3
Difference of coaxial wheel diameter	0.9	1.8	0.8	1.7
Difference of co-bogie wheel diameter	2.6	3.9	3.85	1.7
Traction motor temperature	93	61.6	92.8	52
Brake shoe thickness	40	35	17	19
Risk of elastic suspension device	30	24	26	23
Risk of bogie frame	15	18	29	20
Risk of ground device	51	40	55	47