Chapter 10. Sinusoidally Driven Oscillations. Question of Chapter 10. How do the characteristic frequencies generated in one object (say a piano string) excite vibrations in another object (say a sounding board)?. A Simple Driving System. Natural Frequency ( w o ).
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Sinusoidally Driven Oscillations
Click on the link and experiment
FrequencyDamping and the Steady State
As damping is increased the height of the peak decreases
PBW = 38.2/N measured in %
PBW = 38.2/2200 = 0.017%
or 0.076 Hz!
Let Mode 1 have a natural frequency of 10 Hz and Mode 2 a natural frequency of 17.32 Hz.
FrequencyDriving Point Response Function or Resonance Curve
The tray is clamped at three places. Sensors ( )and drivers ( )are used as pairs in the locations indicated.
196, 392, 588, 784, 980, 1176, …
Depress G3 slowly
Press & release G4
392, 784, 1176, 1568, 1960, 2352, …