Single mass dual frequency fixed delayed resonator

F - Mech Eng,Light,Heat,Weapons – 16 – F

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F16F 9/50 (2006.01) F16F 7/10 (2006.01)

Patent

CA 2181244

Vibrations are dampened by determining two principal frequencies of excitation for the structure and coupling thereto a damping member to produce an absorber. The spring damper characteristics of the absorber are determined at these frequencies and the displacement of the damping member is monitored. The monitored displacement of the damping member is processed together with the spring damping characteristics of the absorber to output a signal. This produces two frequencies of vibration in the damping member substantially equal to the determined frequencies of excitation and thereby produces a resonance of the damping member at the determined frequencies of excitation. The resonance is effective to damp the vibrations at the determined frequencies of excitation.

On amortit des vibrations dans une structure en déterminant pour celle-ci deux fréquences principales d'excitation et en couplant cette structure à un élément d'amortissement (DFFDR) afin de constituer un élément absorbant. On détermine au niveau de ces fréquences les caractéristiques d'amortissement élastique de l'élément absorbant et on contrôle le déplacement de cet élément d'amortissement. On traite ce déplacement en même temps que les caractéristiques d'amortissement élastique de l'élément absorbant, afin de produire un signal (f). En réponse à celui-ci, il y a production de deux fréquences de vibration dans l'élément d'amortissement (DFFDR) qui sont sensiblement égales aux fréquences déterminées d'excitation, et, par conséquent production d'une résonance dans l'élément d'amortissement (DFFDR) au niveau des fréquences déterminées d'excitation. Cette résonance est efficace pour amortir les vibrations au niveau des fréquences déterminées d'excitation.

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