The internal combustion engine produces ample possibilities for excitation of the engine structure itself, the supporting structure, the hull girder as well as the shafting. Controlling first three may seem sufficient for determining condition of the engine and its surrounding. However you must not forget about the fourth – shafting.
High vibration of propulsion systems may lead to:
- Shaft alignment problem
- Main engine bearings problem
- Intermediate bearing problem
- Damage of stern tube bearing and sealing
It is very important to maintain the ship properly exploitation because non-typical causes of vibration which cannot be detected easily can cause severe damages to the propulsion system. Proper design of the ship propulsion is not sufficient for reliable ship operation.
Example of performed service can be found here.