15.3.2 Resilient mounting
Generating sets, comprising engine and generator mounted on a common base frame, are usually installed
on resilient mounts on the foundation in the ship.
The resilient mounts reduce the structure borne noise transmitted to the ship and also serve to protect the
generating set bearings from possible fretting caused by hull vibration.
The number of mounts and their location is calculated to avoid resonance with excitations from the gener-
ating set engine, the main engine and the propeller.
NOTE! To avoid induced oscillation of the generating set, the following data must be sent by the shipyard
to Wärtsilä at the design stage:
• main engine speed [RPM] and number of cylinders
• propeller shaft speed [RPM] and number of propeller blades
The selected number of mounts and their final position is shown in the generating set drawing.
Product Guide Wärtsilä 34DF - 3/2012 139
Product Guide
15. Foundation
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