Question

Question 4. The shaft of a single-cylinder high-speed air compressor is coupled to a heavy flywheel whose moment of inertia may be assumed infinite. The equivalent moment of inertia of the compressor is 0.4 kg.m2. The existence of a forth harmonic of amplitude 7 Nm in the compressor torque curve is responsible for a critical speed at 480 rev/min, the maximum deflection of the shaft being restricted by viscous damping influences to 20 Find the vibration amplitude produced at 300 rev/min by a sixth order harmonic of amplitude 2 Nm, and the percentage speed fluctuation of the compressor. Approximate answers: 0.06° and 0.6%

Answer 1

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