Paper

“Practical Implementation of Torsional Analysis and Field Measurement,”
M. E. Leader & R. D. Kelm, 1997.
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Abstract

This paper is intended as a “nuts-and-bolts” approach to torsional analysis. Basic methods are detailed including how to calculate the stiffness and inertia of machine parts. Simple 2-mass and 3-mass systems are illustrated as well as complex systems that must be computer modeled. Forced response of torsional systems is investigated and several case studies are presented. Torsional analysis problems can become extremely complicated and theoretical modeling often must be tempered with actual field measurements. This way system modifications can be made with greater certainty of success. Various methods of measuring torsional vibration frequency and amplitude are presented; some that are accurate. Correlation to a mathematical model and solutions to torsional problems are presented. Several case histories are detailed and references to other torsional analysis material is provided.

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