Effects of Side Load Chains of a Combine Harvester on Unbalanced Dynamic Vibrations of Its Threshing Drum

Table 2

Constrained mode of the threshing drum.

Modal order	Frequency (Hz)	Critical speed (rpm)
1	143.76	8625.60
2	143.77	8626.20
3	197.05	11823
4	293.1	17586
5	298.33	17899.80
6	198.41	11904.60