KIG3003 Quiz 3 - Harmonic Force Vibration SDOF

The magnification factor is the ratio of maximum amplitude and static deflection.

• True

• False

The response will be harmonic if excitation is harmonic

• True

• False

The reduction in magnification factor in the presence of damping is less significant at or near resonance

• True

• False

The response of a system to a harmonic excitation is called _____ response

• random

• transient

• harmonic

• non-periodic

When the frequency of excitation coincides with the natural frequency of the system, the condition is known as _____

• free vibration

• harmonic excitation

• beating

• resonance

When the base of system is subject to harmonic motion with amplitude Y resulting in a response amplitude X, the ratio  $\frac{X}{Y}$  is called _____

• resonance

• displacement transmissibility

• relative motion

• force transmissibility

The response of an undamped system under resonance will be

• very large

• infinity

• zero

The reduction of the amplitude ratio in the presence of damping is very significant

• near $\omega=0$

• near $\omega=\infty$

• near $\omega=\omega_n$

The force transmissibility of a system, subjected to base excitation (with amplitude Y) resulting in a transmitted force  $F_T$   is defined as

•  $\frac{F_T}{kY}$  

•  $\frac{X}{kY}$  

•  $\frac{F_T}{k}$  

The value of the amplitude ratio at resonance is called ____ factor

• P

• Q

• R

• S