In the idealized model shown (See Attached)
m = slug, k = 9 lb/ft and the viscous damping factor is 0.15. For what range of frequency ratios will the magnification be greater than 1?
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For M > 1, we want (1-r2)2 + 4zeta2r2 < 1
Or zeta = ...
The expert determines the frequency ratios. The range of frequency ratios that the magnification will be greater than one is discussed.