Browse Publications Technical Papers 2005-01-2273
2005-05-16

Measurement of Torsional Natural Frequencies, Moments of Inertia and Torsional Stiffness of Shafts 2005-01-2273

This paper presents a method to measure torsional natural frequencies and to calculate moment of inertia and torsional stiffness of a shaft. The concepts of equivalent mass moment of inertia and equivalent torsional stiffness are used to model the shaft. The method applies two identical accelerometers to measure the frequency response functions (FRFs) on two symmetric positions about the shaft. Adding these two FRFs, the bending components of the FRFs are canceled, whereas the torsional components of the FRFs are retained and enhanced. Hence, the torsional natural frequencies of the shaft can be found. By attaching a uniform hollow disk firmly to the free end of the shaft and measuring the new FRFs of the system with the disk, the moment of inertia and torsional stiffness of the shaft can be calculated.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Engine Noise Reduction Using Self-Tuning Torsional Vibration Damper

2016-01-1063

View Details

TECHNICAL PAPER

Third Generation of High-Response and High-Output 3.5L V-6 Engine

2002-01-0450

View Details

TECHNICAL PAPER

Brake Squeal Reduction Using Robust Design

2003-01-0879

View Details

X