If K1 = 0 in the torsional system of Problem, the system becomes a degenerate two-DOF system with only one natural frequency.
Discuss the normal modes of this system as well as a linear spring-mass system equivalent to it.
Show that the system can be treated as one of a single DOF by using the coordinate ? = (θ1 - θ2),
Problem
Determine the normal modes of the torsion al system shown in Fig. P5-5 for K1 = K2 and J1 = 2j2 .
