Low-Frequency Vibration Testing of Huge Bucket Wheel Excavator Based on Step-Decay Signals

Table 2

Selected simulated natural frequencies.

Mode	Frequency	Vibration form
1	0.499	Overall y-direction swing
2	0.725	Overall z-direction swing
3	1.054	Overall x-axis rotation
4	1.761	x-axis torsion
5	1.982	Overall y-axis rotation
6	2.535	Overall z-axis rotation
7	2.831	Overall y-direction bending
8	3.079	Overall z-direction bending
9	3.848	Coupled bending and torsion