Abstract
This paper (a) points out that, just as in the case of linear systems, the “alternating-current network analyzer” may he used to extend the graphical method to the direct solution of torsional-oscillation problems involving many masses and springs, more than one of which may he nonlinear, and (b) illustrates the use of the “differential analyzer” in solving steady-state vibration problems in which the approximate graphical method cannot be applied or does not give satisfactory solutions. In both of these methods the torque-amplification curves are determined simply and directly. It is indicated that the same methods apply to linearly vibrating systems with nonlinear springs as well as to systems having, for example, nonlinear damping or inertia coefficients.
