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Notes 9 Torsional Vibrations a (twisted) Overview

1459/659 S&V measurementsNotes 9 Torsional Vibrations a (twisted) OverviewLuis San AndresMast-Childs Chair Professor 2019 Torsional Vibrations a (twisted) Overview & Adolfo Delgado, Texas A&M University-Mechanical Engineering Department, January 2018 Contents reproduced (with permission) and adapted from Torsional Dynamic Overview course developed by Brian Murphy Rotating Machinery Analysis, Inc. Copyrighted materialME 459/659 Sound & Vibration Measurements Notes 9 The Basics of Torsional Vibrations3 Torsional vibration is oscillatory twisting of the shafts in a rotor assembly that is superimposed to the running speed.

Angular speed W is easily recorded using a tachometer (mechanical or ... installed in (low) friction bearings or supports with the torque determined by multiplying a reaction force (F) x arm length. ... no contact, low mass static and dynamic torque (to 20 krpm)

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