Patent ID: 6033312
Filing Date: 2000-03-07
Classification: F16F,Y10T

Abstract:
A method for controlling lateral vibration in a rotating shaft, said rotating shaft having a length (L), cross-sectional moment of inertia (I), modulus of elasticity (E), and unit length weight (w), said rotating shaft having a first order critical frequency, said rotating shaft having a second order critical frequency node spaced proximal to a longitudinal center of said rotating shaft, said rotating shaft having an operating frequency range defined by a lower operating frequency and an upper operating frequency, said method comprising the steps of:defining an adjusted first order critical frequency (F.sub.adj) for said rotating shaft, said adjusted first order critical frequency being equal to or less than said lower operating frequency; anddisposing a mass having a predetermined weight (W) in combination with said rotating shaft at said second order critical frequency node, whereby said mass maintains said adjusted first order critical frequency at a frequency equal to or less than said lower operating frequency, thereby controlling lateral vibration of said rotating shaft as said rotating shaft rotates within said operating frequency range.