Damping

Graph of a damped vibratory deflection y.

Damped spring.

In physics, damping is any effect that tends to reduce the amplitude of vibrations.

In mechanics, the internal friction may be one of the causes of such damping effect. For many purposes the damping force F_f can be modeled as being proportional to the velocity v of the object:

[math]\displaystyle{ F_{\mathrm f} = -c v \, , }[/math]

where c is the damping coefficient, given in units of Newton-seconds per meter.

Damping Media

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  Plot of a damped sinusoidal wave represented as the function y(t) = e^{- t} \cos(2 \pi t)

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  The effect of varying damping ratio on a second-order system.

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  Phase portrait of damped oscillator, with increasing damping strength. It starts at undamped, proceeds to underdamped, then critically damped, then overdamped.

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  Damping ratio Logarithmic decrement

Related pages

• RLC circuit
• Oscillator
• Resonance
• Seismic damper
• Vibration
• Vibration isolation
• Vibration control