A double‑mass system consists of two shafts and two masses represented by the corresponding moments of inertia, concentrated in a given distance as nodal masses. The left shaft is fixed, and the right mass is free. Neglecting the self‑weight of the shafts, determine the torsional natural frequencies of the system.
_LI.jpg?mw=760&hash=eca1e5a7c08e7a5100b51465a3fc1a9deb87b2b8)