Coupled Torsional and Longitudinal Vibrations of a Thin Bar

Abstract

Abstract The effect of pretwist on the natural frequencies of coupled torsional-longitudinal oscillations of thin bars is studied. It is found that the natural frequencies of oscillations which consist primarily of torsional motion may be considerably increased depending upon the thinness of the bar, and the amount of pretwist. The natural frequencies of oscillations which consist primarily of longitudinal motion are not significantly altered.