Hard to tell, but something like the one in the link above. Yes, vibration levels are predominant in the X-axis/axial/longitudinal direction.
Measurements in all 3 directions confirm that vibrations are predominant in the longitudinal direction...
That's a good candidate for a high energy source exciting high frequencies... but test were conducted with 2-3-4-6 diesel engines in different...
We are talking about a 98m (322') Class III Arctic Ice breaker. The boat is propelled directly by 2 independend electric motors (fed by 6...
Vibrations are predominant in the longitudinal (or axial or X) direction. Only the rear of the boat are subject to these vibrations.
I do not think the rotation of the shaft has much to do with the excited resonant frequency for 3 reasons: 1 - Shaft vibration (measured on the...
The excited frequency is very far from the shaft/vane pass frequency: Natural frequency of bulkhead : 7300 cpm Rotational speed of shafts :...
I was recently involved in a study where we were trying to identify some problematic vibration issues on a rather large boat (built in 1982)....
