Table 3 Degrees of freedom of the models of heavy components in one vehicle.

From: High frequency traction rod model and its structure-borne sound transmission characteristic of high-speed trains

Component

Number

Rigid modes

Flexible modes

Total

Carbody

1

6

–

6

Bogie frame

2

6

245

502

Axle box

8

6

4

80

Wheelset

4

6

50

224

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