Question

State four characteristics of forced vibrations.

Answer 1

Step 1:

Definition of forced vibrations:

• Force vibrations are vibrations that take place under the influence of an external periodic force.

Step 2:

Characteristics of forced vibrations:

• The body learns to recognize the frequency of a periodic external force.
• If the frequency of the external force is substantially different from the body’s natural frequency, the amplitude of forced vibration is quite modest.
• Vibration amplitude is constant over time, while magnitude is dependent on the frequency of the driving force.
• The amplitude of oscillations is very great if the frequency of external force is exactly equal or is an integral multiple vibrating body.