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Structural failure due to harmonic vibration



 
 
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Old November 8th 07, 06:23 PM posted to rec.aviation.piloting
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Default Structural failure due to harmonic vibration

Out of physics curiousity, can anyone point to any references on induced
vibrations in aircraft (or any other mechanical) structures associated
with or caused by parametrically induced induced *subharmonic* or
*parametric* oscillations?

["Parametric oscillation" = a phenomena well known in electronics and
optics, in which if a structure has natural resonances with resonant
frequencies f1 and f2, and the structure is then excited or "pumped"
with a periodic force at a "pump" frequency fp = f1 + f2, this can cause
coupled oscillations to occur and grow at the "signal" and "idler"
frequencies f1 and f2.]
 




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