Question

Explain term, Free vibrations.

Answer 1

Free vibration is a type of vibration in which a force is applied once and the structure or part is allowed to vibrateat its natural frequency. ... Free vibration occurs when a mechanical system is set off with an initial input and then allowed to vibrate freely.

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Answer 2

Answer:

Free vibrations: A body capable of vibrations is

said to perform free vibrations when it is disturbed

from its equilibrium position and left to itself.

In the absence of dissipative forces such as fric-

tion due to surronding air and intemal forces, the

total energy and hence the amplitude of vibrations

of the body remains constant. The frequencies of the

free vibrations of a body are called its natural

frequencies and depend on the body itself.

In the absence or a maintainin5 torce, in Practice,

the total energy and hence the amplitude decreases

due to dissipative forces and the vibration is said to

be damped. The frequency of damped vibrations is

less than the natural frequency.