Mutual Interference and Coupling Response of Multicylinder Vibration among Combine Harvester Co-Frame

Table 4

Mode characteristics and frequencies of cylinder II.

Order	Frequency (Hz)	Mode characteristic
1	20.288	The cylinder rotated clockwise and counterclockwise cyclically around the transmission shaft in a range of about 90°
2	62.916	The middle wheel vibrated along the y direction cyclically
3	62.922	The middle wheel vibrated along the x direction cyclically
4	103.03	The cylinder vibrated along the z direction cyclically, and the bars vibrated like a wave
5	122.01	The wheel on both sides rotated around the transmission shaft in opposite directions and caused the bars connected to them to tilt
6	125.99	The cylinder vibrated along the angular bisector of the angle between the increasing x direction and the increasing y direction cyclically
7	126.04	The cylinder vibrated along the angular bisector of the angle between the decreasing x direction and the increasing y direction cyclically
8	151.36	The middle wheel and the wheel on both sides did torsional vibration around the transmission shaft in the opposite direction