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Differentiate viscous and coulomb damping.

written 6.8 years ago by rakeshrameshpoojari • 80

modified 2.9 years ago by Krishna_Agrawal • 2.7k

mechanical vibrations

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written 2.9 years ago by Krishna_Agrawal • 2.7k

Viscous Dumping	Coulomb Dumping
In case of viscous damping, the ratio of the two successive amplitudes is constant.	In case of coulomb damping, the difference between any two successive amplitudes is constant.
Viscous dampening is caused by energy losses in liquid lubrication between moving parts.	Coulomb dampening is caused by friction between rubbing surfaces that are dry or don't have any lubrication.
Viscous damping force is proportional to the velocity.	Coulomb's damping force is independent of velocity but depends on the co efficient of friction.
Viscous dampening is applied for both liquids and solids.	Coulomb damping is applied only for solids.
In case of viscous damping, liquid observes energy so energy dissipation takes place.	In case of coulomb damping, energy dissipates because of friction between two solid surfaces.

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