The MF for a harmonically excited spring-mass-damper system at ω0/ωn ≈ 1 is equal to 5. Calculate the damping ratio of the system. What would the damping ratio be if the MF were equal to 10? Sketch the magnification factor at ω0/ωn ≈ 1 as a function of the damping ratio.
Figure P9.61
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