QUESTION 2
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Consider an electrical motor with mass M = 901.8129 kg located at the middle of pinned-pinned beam, as shown in the figure below. Assume that the Young’s modulus of the beam E = 8.5470x1010 Pa, moment of inertia I = 8.3375x104 mm4 , length of the beam L = 0.2859 m and zero initial conditions. If there is an unbalance mass of m0 = 2.3714 kg in the rotating part of the motor, eccentricity is e = 4.1473 mm, and the rotor is rotating with speed of ω = 2.2892x104 rpm, determine the amplitude response of point A in 0.3 s. Assume there is no damping in the system i.e. ζ = 0 and neglect the mass of the beam. Note: Equivalent stiffness of the beam at point A is keq = 48EI/L3.
a. 0.2162 mm
b. -0.6485 mm
c. -0.1013 mm
d. 0.3040 mm
e. -0.2027 mm
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QUESTION 2
Consider an electrical motor with mass M = 901.8129 kg
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