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In vibration isolation system, if ω/ωn < 2,...

In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be

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asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

In vibration isolation system, if ω/ωn < 2, then for all values of damping factor, the transmissibility will be

(a) less than unity

(b) equal to unity

(c) greater than unity

(d) zero

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My question is taken from Types of Vibratory Motion and Natural Frequency of Free Longitudinal Vibrations in division Longitudinal and Transverse Vibrations of Machine Dynamics

machine dynamics
longitudinal and transverse vibrations
types of vibratory motion and natural frequency of free longitudinal vibrations

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1 Answer

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answered Oct 15, 2022 by Fred (38.6k points)

The correct answer is (c) greater than unity

To explain: For underdamped systems the maximum amplitude of excitation has a definite value and it occurs at a frequency ω/ωn1. For damping factor, the transmissibility will be greater than unity.

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