推進軸系の自励振動に関する一考察

概要

論文の詳細を見る
This paper presents some results of the calculation on the self-excited vibration of the shafting system due to the dynamic characteristics of the oil film in the bearing. At first the critical speed at which the self-excited vibration appears, ignoring the mass and stiffness of the ship structure, was calculated for the container ship and the high speed ship. The second calculation, by means of the transfer matrix method, takes into account the mass and stiffness of the ship structure, gyroscopic action of the propeller and the stiffness and damping of the oil-film in bearing. The following results are obtained from the above calculation. The self-excited vibration of the shafting system is not likely to occur in the container ship and the high speed ship in the present design. However in case of the high speed ship when the shaft revolution is more than twice the present design at MCR, there is a possibility that the self-excited vibration appears. Also it was confirmed that, when the natural frequency of the ship-structure is much larger or smaller than that of the shaft, the interaction of each vibration is negligible, and the vibrations of the shaft can be estimated assuming the ship to be rigid.
社団法人日本船舶海洋工学会の論文
1989-08-25