Tonal Vibration Absorption of Diesel-Generators

In a recent project, abating the 1 order (25 Hz) transmitted vibration from three 170 KVA marine diesel generators onboard a motor yacht, to the hull of the boat was successfully accomplished using a number of small tuned vibration absorbers. Four tuned vibration absorbers, targeting the 25 Hz vibration, were designed, fabricated, and installed on each of the three diesel generators, at their mounting feet. This solution reduced the vibration of these 2-ton machines (engine weighs about 900 Kg and generator weighs 1100 Kg) by more than 80%, at their tuning frequency. More