Forced vibration is the phenomenon where a machine or structure is subjected to a continuous or periodic external force, causing it to vibrate at a specific frequency.
Natural vibration occurs when a machine or structure vibrates at its own natural frequency without any external force applied. Forced vibration, on the other hand, is caused by an external force and can occur at frequencies that are different from the natural frequency of the system.
The factors that affect forced vibration include the frequency and amplitude of the external force, the stiffness and damping of the system, and the mass of the system.
Forced vibration is analyzed using mathematical models and equations, such as the equation of motion and the frequency response function, to determine the response of the system to the external force.
Forced vibration can be controlled or reduced by adjusting the stiffness and damping of the system, using vibration isolators or dampers, and implementing proper maintenance and design practices.
