A 400-kg motor supported by four springs, each of constant
Chapter 19, Problem 19.166(choose chapter or problem)
A 400-kg motor supported by four springs, each of constant 150 kN/m, and a dashpot of constant \(c=6500\mathrm{\ N}\cdot\mathrm{s}/\mathrm{m}\) is constrained to move vertically. Knowing that the unbalance of the rotor is equivalent to a 23-g mass located at a distance of 100 mm from the axis of rotation, determine for a speed of 800 rpm (a) the amplitude of the fluctuating force transmitted to the foundation, (b) the amplitude of the vertical motion of the motor.
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