SINGLE MASS DUAL FREQUENCY FIXED DELAYED RESONATOR

摘要

Vibrations are damped by determining two principal frequencies of excitation for the structure and coupling thereto a damping member (DFFDR) to produce an absorber. The spring damper characteristics of the absorber are determined at these frequencies and the displacment 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 (f). This produces two frequencies of vibration in the damping member (DFFDR) substantially equal to the determined frequencies of excitation and thereby produces resonance of the damping member (DFFDR) at the determined frequencies of excitation. The resonance is effective to damp the vibrations at the determined frequencies of excitation.