Figure P9.25 shows a machine attached to a fixed-pinned beam through an isolator. Design an isolator of

Question:

Figure P9.25 shows a machine attached to a fixed-pinned beam through an isolator. Design an isolator of damping ratio 0.1 such that the force transmitted to the beam is $2000 \mathrm{~N}$ when the machine is subject to a harmonic excitation with an amplitude of $12,000 \mathrm{~N}$ at a frequency of $300 \mathrm{rad} / \mathrm{s}$. Use a three degreeof-freedom lumped-mass model for the beam.

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