K. Shingu, Y. Aoki, T. Irie, K. Hiratsuka, M. Yukawa, Nihon University, Funabashi, Japan
In recent years, there are many studies on vibration control and base isolation of buildings and bridges, one of the examples is base isolated building with laminated rubber and dampers. Some of the authors have proposed a fuzzy variable rigidity control of a structure.In this paper, a single-degree-of-freedom system structure with springs made of shape memory alloys (SMA’s) subjected dynamic loads is vibrated, and then the SMA springs are heated or cooled. As the rigidity of the SMA spring is changed from the own characteristics, the resonant frequency of the structure is changed, finally the magnitudes of responses decrease. The effects and the results of vibration control / quick response are discussed.
Summary: In recent years, there are many studies on vibration control and base isolation of buildings and bridges, one of the examples is base isolated building with laminated rubber and dampers. Some of the authors have proposed a fuzzy variable rigidity control of a structure.
In this paper, a single-degree-of-freedom system structure with springs made of shape memory alloys (SMA’s) subjected dynamic loads is vibrated, and then the SMA springs are heated or cooled. As the rigidity of the SMA spring is changed from the own characteristics, the resonant frequency of the structure is changed, finally the magnitudes of responses decrease. The effects and the results of vibration control / quick response are discussed.
