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 on which it acts. decompressor are needed to see this picture. • Resonance is like pushing a child on a swing
Energy Dissipation • Friction: conversion to heat energy • Radiation : conversion to sound energy QuickTime™ and a decompressor are needed to see this picture.
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.
Energy flow and resonance
Degrees of freedom • Each natural mode has it’s own resonant response, peaked at it’s own frequency. • The violin: has a peaky QuickTime™ and a decompressor nonuniform response to pure are needed to see this picture. sine waves.
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