Question

what is the cause of damping​

Answer 1

Answer:

Viscous damping is caused by such energy losses as occur in liquid lubrication between moving parts or in a fluid forced through a small opening by a piston, as in automobile shock absorbers. ... The motion of a vibrating body is also checked by its friction with the gas or liquid through which it moves.

Any particular spring may be damped for all sorts of reasons. Any way the spring can lose energy contributes to damping, so it could be lost internally to heat due to stressing the material, or externally to heat via friction, or externally to an electromagnetic field, to some sort of mechanical dashpot, etc.

Answer 2

Damping is caused due to friction, energy dissipation, Eddy currents, etc.

• The process of restraining motions such as vibration, oscillation, etc is called damping.
• In damping, an opposition of the natural movement takes place.
• The causes of various types of damping are explained below;

Mechanical damping.

• When a system is in some mechanical motion, its energy gets dissipated in the form of heat and sound.
• This is mechanical damping.
• Here friction acts between the systems to oppose its motion.

Radiation damping.

• When charges move, they vibrate.
• Their vibrational energy gets converted to electromagnetic energy in the form of visible, radio, or infrared radiations.
• Radiations are emitted when vibratory motion is opposed.
• This is radiation damping.

Magnetic damping.

• When a conductor is placed within a moving magnetic field, eddy currents come into action.
• This current always opposes any kind of motion taking place.
• This is magnetic damping.