Abstract
In natural disasters, natural power causes various vibrations for existing structures, For control in natural disaster, isolation or suppression of vibration is important. Main vibration souces of natuaral disaster are earthqukae and wind. For earthquake, base isolation is used as a means of vibration isolation technique, this technique has been spreading in Japan. This paper surveys the theory and control of vibration isolation. The basic theory of vibration isolation is to make fundamental frequency lower than earthquake frequency range and suppress the resonance at this natural frequency of a strucure. Recently active/semi-active control methodologies have been proposed for the suppression of the resonance. In this paper, some techniques are introduce.
Published Version
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