Torsional Vibration Notes With Solutions for an Untuned Viscous Damper and Flexible Coupling With Nonlinear Elasticity

Several special relations are derived that may be used to simplify the solution of certain phases of the torsional vibration problem. A solution is described for the vibration of a system with an untuned viscous damper. Numerical values are given for the nonlinear elasticity of the Falk-Bibby type couplings. These values are rearranged into a form suitable for calculating undamped resonance curves of an engine installation which includes one of these couplings. An approximate solution for the resulting vibration is described and illustrated by calculation.