Damping & types
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There are four main types of damping: viscous, Coulomb, material, and magnetic. Viscous damping dissipates energy through movement in a fluid medium. Coulomb damping provides a constant damping force opposite to motion caused by dry or insufficiently lubricated friction surfaces. Material or hysteresis damping results from internal friction as a material deforms. Magnetic damping converts kinetic energy to heat through eddy currents induced in a coil or plate near a magnet during oscillation.
Damping & types
- 2. Damping It is the dissipation of energy from a vibrating structure.
- 3. Types of Damping 1) Viscous damping 2) Coulomb or dry friction damping 3) Material or solid or hysteretic damping 4) Magnetic damping
- 4. Viscous damping It is the dissipation of energy that due to the movement of bodies in a fluid medium.
- 5. Coulomb damping ♦ The damping force is constant in magnitude but opposite in direction to that of the motion of the vibrating body. ♦ It is caused by friction between rubbing surfaces that are either dry or have insufficient lubrication.
- 6. The Structural (Hysteresis) Damping The damping caused by the friction between the internal planes that slip or slide as the material deforms is called hysteresis (or solid or structural) damping .
- 7. ♦ The structural damping is caused by Coulomb friction at a structural joint. It depends on many factors such as joint forces or surface properties
- 8. Magnetic Damping Energy of motion is converted to heat by way of electric eddy currents induced in either a coil or an aluminum plate (attached to the oscillating object) that passes between the poles of a magnet.
- 9. Thank you….