Question

In steady state forced vibrations, the amplitude of vibrations at resonance is _____________ damping coefficient.

(a) equal to

(b) directly proportional to

(c) inversely proportional to

(d) independent of

I got this question by my college director while I was bunking the class.

My query is from Types of Vibratory Motion and Natural Frequency of Free Longitudinal Vibrations in portion Longitudinal and Transverse Vibrations of Machine Dynamics

Answer 1

The correct option is (c) inversely proportional to

To explain: Forced vibration is when a time-varying disturbance (load, displacement or velocity) is applied to a mechanical system. The disturbance can be a periodic and steady-state input, a transient input, or a random input. The periodic input can be a harmonic or a non-harmonic disturbance.