Abe Naoto    Department   Undergraduate School  , School of Science and Technology    Position   Professor
Date	2016/08/24
Presentation Theme	Semi-active dynamic absorber using the variable stiffness mechanism by meshing of the rack gear
Promoters	The Japan Society of Mechanical Engineers
Conference Type	Domestic
Presentation Type	Speech (General)
Contribution Type	Collaborative
Publisher and common publisher	Keisuke INOMATA, Naoto ABE
Details	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.