Vibration Problems

Engineering Dynamics Incorporated	"Experts in the Analysis and Solution of Vibration Problems Worldwide."

Vibration Problems J. C. Wachel, Mechanical Engineering, November 1977 .

The torsional vibration was sensed by magnetic probes mounted on the gear box to pick up the tooth passing rate of the bull gear and pinion gear. These pulse signals were conditioned with two frequency-to-voltage converters to give outputs that were proportional to the torsional vibration velocity and were recorded on a magnetic tape recorder for detailed analysis. This method of torsional sensing can give false indications if the gears used experience any lateral or axial vibration. For this reason, some of the gear box lateral shaft probes were also monitored during the test. Data was recorded over the speed range of 600 to 4820 RPM.