抄録
This paper deals with the development of a two axis active mass damper using the hydraulic actuator to reduce the vibration occurred in ships. The authors have produced a prototype model of an active mass damper and verified high performance ensured by Model Test and corresponding simulate calculations. The conclusions obtained are as follows. (1) From the experiment, the vibration of the model structure was reduced to about 1/5 by this device at sinusoidal excitation test. (2) At the excitation test using the wave form acquired from the actual running ship, the vibration of the model structure was also reduced to about 1/5. From an efficiency viewpoint, this device should be superior to the conventional passive one, of which efficiency might be decreased in case of random vibration with fluctuating amplitude compared with sinusoidal vibration. (3) As same performance was obtained at the simultaneous two directions exciting test, this device is found to be effective for the vibration in an arbitrarily direction in a holizontal plane that offen ocurred on actual running ships.
