ラックギアのかみ合いによる剛性可変機構を用いたセミアクティブ動吸振器

抄録

The structure causes a resonance at the natural frequency and large vibration occurs. As a method to shift the resonance frequency, the dynamic absorber using the additional mass is known well. It is known that the dynamic absorber is effective at the specific frequency, but is ineffective in the other frequency band. Because the resonance frequency depends on the stiffness, it is necessary to devise a semi-active dynamic absorber to change the stiffness by the frequency of the structure. In prior research, there was a problem of ”the occurrence of acceleration disturbance.” In order to improve the problem, a variable stiffness mechanism is realized by meshing the rack gear using the solenoid actuator which has a small operating range. The stiffness of the dynamic absorber is changed according to the frequency of the structure, and it is verified that the effect of the semi-active dynamic absorber by simulations and vibration experiments with some seismic waves.