Experimental Research on the Vibration of Ship Propulsion Shaft under Hull Deformation Excitations on Bearings

Table 2

The cases used to analyse the effect of excitations.

	Amplitude (mm)	Frequency (Hz)	Location	Direction	Rotation speed (r/min)
Effect of amplitudes	0.5/1.5	2	Middle	X	120
	0.5/1.5	2	Middle	Y	120
	0.1/0.5	2	Stern	X	120
	0.1/0.5	2	Stern	Y	120
Effect of frequencies	0.5	2/4	Middle	Y	120
	0.5	2/4	Stern	Y	120
Effect of directions	0.5	2	Middle	X/Y	120
	0.5	2	Stern	X/Y	120
	0.5	2	Middle + stern	X/Y	120
Effect of rotation speed	0.5	2	Middle	X	70/120/170
	0.5	2	Stern	Y	70/120/170