油圧機構の動特性に基づくエネルギー変換アクティブ制震システムの特性評価

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タイトル別名
  • CHARACTERISTICS EVALUATION OF ACTIVE SEISMIC RESPONSE CONTROL SYSTEM BY UTILIZING ENERGY CONVERSION IN DAMPERS BASED ON HYDRAULIC TECHNOLOGY
  • ユアツ キコウ ノ ドウトクセイ ニ モトズク エネルギー ヘンカン アクティブセイシンシステム ノ トクセイ ヒョウカ

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 We have reported an active seismic response control system by making use of an energy conversion in damping devices. This system converts the vibration energy of the structure by large earthquakes with a damper, and accumulates it. Then, it reutilizes this energy, and drives an actuator as a vibration control device. In this paper, we propose a numerical analytical method considering the dynamic characteristics of hydraulic technology which can control large forces and energies easily. Various system characteristics are evaluated using this method, and the following knowledges are summarized.<br> (1)Various energy characteristics including the input-and-output energy balance and the maximum responses of vibration models of active and passive seismic control are expressed through the numerical analyses reflecting the energy characteristics based on hydraulic analyses.<br> (2)The pressure control mechanism of accumulators corresponding to the earthquakes level is proposed. Through the analyses for the parameters of the earthquake levels and the accumulator pressures, it is inspected that the input-and-output energy balance can be kept well by changing the accumulator pressure which corresponds to earthquake levels.<br> (3)The switching technique of the active and the semi-active damping based on the time history characteristics is proposed to improve the input-and-output energy balance. Through the numerical analytical method using proposed technique, it is inspected to maintain the maximum response values equivalent to the active seismic response control, while keeping the input-and-output energy balance well.<br> We have shown that the characteristic evaluation of the system is possible by the simple numerical modelling where the dynamic characteristics of the hydraulic mechanism can be expressed without the complicated hydraulic pressure analyses. In addition, two methods improving the input-and-output energy balance are proposed and its validity is inspected.<br> Furthermore, we have clarified the need considering the energy conversion efficiency of the actuator by proposed numerical analysis models.

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