AN APPARATUS FOR DAMPING THE TORSIONAL EXCITATION OF A DRIVE SHAFT

摘要

An apparatus for damping the torsional excitation of a drive shaft, said apparatus comprising: a member secured to one end of the drive shaft and extending along the drive shaft; and damping means secured to the other end of the drive shaft for damping vibration of the end of said member remote from the securing of the member to said one end of the drive shaft. A hydraulic circuit for damping the vibration of a component in a first dimension, said circuit comprising: a pair of hydraulic cylinders disposed so that the actions of the pistons of the cylinders oppose one another in said first dimension, said pistons communicating with said component; and a fluid flow path between said cylinders, vibration of said component in said first dimension causing fluid flow between the cylinders to damp the vibration.