Answer to Question #92362 in Mechanical Engineering for ahmed

Question

An electric motor of mass 30 kg is running at 500 rpm. The motor is supported by a spring of stiffness 7 kN/m and damper which offers a resistance of 60 N at 0.25 m/s. The unbalance of the rotor is equal to the mass of 0.8 kg m located at 50 mm from the axis of rotation. Determine the following for the above system: (j) damping factor (ii) amplitude of vibration and phase angle (iii) resonance speed and amplitude of vibration

Answer 1

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