Resonance Jessica Liroff Definition: Resonance means the - - PowerPoint PPT Presentation

resonance
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Resonance Jessica Liroff Definition: Resonance means the - - PowerPoint PPT Presentation

Resonance Jessica Liroff Definition: Resonance means the comparatively large-amplitude vibration that results whenever the frequency of some driving force closely matches a natural oscillation frequency of the system QuickTime and a


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Resonance

Jessica Liroff

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  • Definition: Resonance means

the comparatively large-amplitude vibration that results whenever the frequency of some driving force closely matches a natural

  • scillation frequency of the system
  • n which it acts.
  • Resonance is like pushing

a child on a swing

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Energy Dissipation

  • Friction: conversion to

heat energy

  • Radiation: conversion to

sound energy

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Energy Dissipation

  • Dissipation is important near

resonance because large amplitude motions provide more chances to change oscillated energy into other forms.

  • strong dissipative forces prevent

large vibrations.

  • Weak dissipative forces make large

vibration amplitudes.

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Energy flow and resonance

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Degrees of freedom

  • Each natural mode has it’s
  • wn resonant response,

peaked at it’s own frequency.

  • The violin: has a peaky

nonuniform response to pure sine waves.

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SLIDE 8