b) In Figure Q2b, a disk flywheel of mass m = 32 kg and radius r = 0.5 m is driven by an electric motor that when it is

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B In Figure Q2b A Disk Flywheel Of Mass M 32 Kg And Radius R 0 5 M Is Driven By An Electric Motor That When It Is 1 (53.53 KiB) Viewed 9 times

b) In Figure Q2b, a disk flywheel of mass m = 32 kg and radius r = 0.5 m is driven by an electric motor that when it is working produces an oscillating torque of Tin = 10sin(wt) N- m. The shaft bearings may be modelled as viscous rotary dampers with a damping coefficient of Br=0.4 N-m-s/rad and stiffness coefficient Kr= 2 Nm! If the flywheel is at rest at t = 0 and the power is suddenly applied to the motor, do the following (Hint: J = mr2/2]: (i) Find the natural frequency of oscillation of the disk expressed in Hz. (5 marks] (ii) Find the damping ratio for this system. (5 marks] (iii) Describe in no more than 3-4 lines the behaviour of the disk flywheel. (5 marks] bearing BR Flywheel J Ке Tw() Figure Q2b