The mechanism shown is a pendulum consisting of a pendulum bob B with mass m and a T bar, which is pinned at O and has negligible mass. The horizontal portion of the T bar is connected to two supports, each of which has an identical spring and dashpot system, each with spring constant k and damping coefficient c. The springs are unstretched when B is vertically aligned with the pin at O. Modeling B as a particle, derive the linearized equations of motion of the system. In addition, assuming that the system is underdamped, derive the expression for the damped natural frequency of vibration of the system.
Figure P9.63
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