Question: A (150 mathrm{~kg}) pump experiences large-amplitude vibrations when operating at (1500 mathrm{rpm}). Assuming this is the natural frequency of a SDOF system, design a dynamic

A $150 \mathrm{~kg}$ pump experiences large-amplitude vibrations when operating at $1500 \mathrm{rpm}$. Assuming this is the natural frequency of a SDOF system, design a dynamic vibration absorber such that the lower natural frequency of the two degree-of-freedom system is less than $1300 \mathrm{rpm}$ and the higher natural frequency is greater than $1700 \mathrm{rpm}$.

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