ON THE GYROSCOPIC VIBRATION OF MARINE STEAM TURBINE DISCS
1926 年 1926 巻 39 号 p. 121-128
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1926 年 1926 巻 39 号 p. 121-128
When a turbine steamer pitches or yaws, such a motion being that of precession with respect to the turbine discs, they are subjected to a gyroscopic force perpendicular to their plane. As this force is evidently distributed harmonically around the discs, and is fixed with respect to axes of reference fixed in the ship, the revolving discs are set to a transversal vibration having one nodal diameter, which is fixed with respect to the said axes of reference.
The author began with the solution of the equation of such vibrating motion without taking the effect of centrifugal stresses into consideration. Next, it was shown how a correction for the effect of the centrifugal stresses may be introduced.
The result obtained by the theoretical investigation was confirmed by a model experiment.
This phenomenon has so far escaped the notice of turbine engineers, but the author emphasizes the necessity of a keen attention for it.
