Analysis and Optimization of Driving Attitude and Oscillation Characteristics of Suspension-Type Small Rail Vehicles

Table 1

Natural frequencies of the system.

Orders	Frequencies (Hz)	Modes
1	0.34	Pitching motion of the carriage
2	0.48	Rolling motion of the carriage
3	0.57	Yawing motion of the carriage
4	3.79	Pitching motion of the bogie
5	6.58	Yawing motion of the bogie
6	8.17	Yawing motion of the bogie mounting rack
7	9.91	Pitching motion of the bogie mounting rack
8	12.14	Rolling motion of the bogie
9	17.67	Rolling motion of the bogie mounting rack
10	32.96	Lateral bending vibration of the bogie
11	36.97	Bending vibration of the bogie rear axle
12	38.47	Twisting vibration of the bogie
13	42.80	Twisting vibration of the bogie rear axle
14	46.06	Lateral bending vibration of the bogie
15	52.59	Bending vibration of the bogie front axle
16	63.91	Twisting vibration of the bogie mounting rack
17	80.27	Lateral bending vibration of bogie boom
18	84.92	Vertical bending vibration of the bogie mounting rack