824_Dynamics 11ed Manual

# 824_Dynamics 11ed Manual - The motor has weight W m Neglect...

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Engineering Mechanics - Dynamics Chapter 22 Given: M 450 kg = d 2m = k 800 N m = v 15 km hr = a 50 mm = Solution: p 2 k M = τ 2 d v = ω 2 π = x max a 1 p 2 = x max 4.53 mm = *Problem 22-52 The electric motor turns an eccentric flywheel which is equivalent to an unbalanced weight W b located distance d from the axis of rotation. If the static deflection of the beam is δ because of the weight of the motor, determine the angular velocity of the flywheel at which resonance will occur.
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Unformatted text preview: The motor has weight W m . Neglect the mass of the beam. Given: W b 0.25 lb = W m 150 lb = d 10 in = g 32.2 ft s 2 = 1 in = Solution: k W m = k 1800 lb ft = n kg W m = n 19.66 rad s = Resonance occurs when ωω n = 19.7 rad s = 822...
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