Marine Installation Manual 2022-03 6-13
6 Engine Dynamics
6.2 External lateral forces and moments
X62DF-S2.0
Figure 6-13 Engine stays arrangement on both engine sides
Electrically-driven compensator
If lateral stays cannot be installed, the following can be used to reduce lateral en-
gine vibrations:
• For H-type mode, one electrically-driven compensator can be installed on
the upper platform in the longitudinal centre point of the engine. This re-
duces the lateral engine vibrations and the effect on the ship’s superstruc-
ture. Alternatively, two compensators, one fitted at each end of the engine
upper platform, can be applied, synchronised in phase.
• For X-type vibration, two compensators, one fitted at each end of the en-
gine upper platform, are necessary and are synchronised in counter-phase.
It must be noted that electrically-driven compensators can only compensate one
harmonic excitation frequency at a time.
12
3
4
5
12
3
4
5
6
12
3
4
5
6
7
12
3
4
5
6
7
8
* Usually no stays
are required for 7 cyl.
8
7
6
Recommended: 8
Optional: -
Recommended: 4*
Optional: +4
Recommended: 4
Optional: +4
Recommended: 4
Optional: +4
No. of
cyl.
SM-0787
5
Recommended
number of stays
Available attachment points on the
platform of the engine’s fuel side & exhaust side
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