Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
VISCOUS DAMPER
To provide a viscous damper which can secure required attenuation performance by properly compensating for the lowering of the viscosity resistance of a viscous body caused by a temperature characteristic and a repeat characteristic even if large vibration energy as in the occurrence of a long-period earthquake motion is repeatedly inputted.SOLUTION: A viscous damper 1A comprises: a ball screw 11 having a screw shaft 11a connected to a first region in a system including a structure, and a nut 11b screwed to the screw shaft 11a; a rotatable first inner cylinder 12 connected to the nut 11b; a non-rotatable first outer cylinder 13 fitted into the first inner cylinder 12, and connected to a second region; a viscous body 14 charged into a clearance between the first inner cylinder 12 and the first outer cylinder 13; a second inner cylinder 22 which rotates in conjunction with the first inner cylinder 12; an immovable second outer ring cylinder 23 opposing the second inner cylinder 22; and a plurality of permanent magnets 24 arranged between the second inner cylinder 22 and the second outer cylinder 23, and making the second inner cylinder 22 rotating in a magnetic field generate Lorentz force by eddy current in a direction opposite to the rotation of the second inner cylinder.SELECTED DRAWING: Figure 3
【課題】長周期地震動の発生時のように大きな振動エネルギが繰り返し入力される場合においても、温度特性や繰り返し特性による粘性体の粘性抵抗の低下を適切に補い、所要の減衰性能を確保できる粘性ダンパを提供する。【解決手段】本発明による粘性ダンパ１Ａは、構造物を含む系内の第１部位に連結されるねじ軸１１ａ、及びねじ軸１１ａに螺合するナット１１ｂを有するボールねじ１１と、ナット１１ｂに連結された回転自在の第１内筒１２と、第１内筒１２に嵌合し、第２部位に連結される回転不能の第１外筒１３と、第１内筒１２と第１外筒１３の間の間隙に充填された粘性体１４と、第１内筒１２と連動して回転する第２内筒２２と、第２内筒２２に対向する不動の第２外筒２３と、第２内筒２２と第２外筒２３の間に配置され、磁界内を回転する第２内筒２２に、その回転と反対方向の、渦電流によるローレンツ力を発生させる複数の永久磁石２４と、を備える。【選択図】図３
VISCOUS DAMPER
To provide a viscous damper which can secure required attenuation performance by properly compensating for the lowering of the viscosity resistance of a viscous body caused by a temperature characteristic and a repeat characteristic even if large vibration energy as in the occurrence of a long-period earthquake motion is repeatedly inputted.SOLUTION: A viscous damper 1A comprises: a ball screw 11 having a screw shaft 11a connected to a first region in a system including a structure, and a nut 11b screwed to the screw shaft 11a; a rotatable first inner cylinder 12 connected to the nut 11b; a non-rotatable first outer cylinder 13 fitted into the first inner cylinder 12, and connected to a second region; a viscous body 14 charged into a clearance between the first inner cylinder 12 and the first outer cylinder 13; a second inner cylinder 22 which rotates in conjunction with the first inner cylinder 12; an immovable second outer ring cylinder 23 opposing the second inner cylinder 22; and a plurality of permanent magnets 24 arranged between the second inner cylinder 22 and the second outer cylinder 23, and making the second inner cylinder 22 rotating in a magnetic field generate Lorentz force by eddy current in a direction opposite to the rotation of the second inner cylinder.SELECTED DRAWING: Figure 3
【課題】長周期地震動の発生時のように大きな振動エネルギが繰り返し入力される場合においても、温度特性や繰り返し特性による粘性体の粘性抵抗の低下を適切に補い、所要の減衰性能を確保できる粘性ダンパを提供する。【解決手段】本発明による粘性ダンパ１Ａは、構造物を含む系内の第１部位に連結されるねじ軸１１ａ、及びねじ軸１１ａに螺合するナット１１ｂを有するボールねじ１１と、ナット１１ｂに連結された回転自在の第１内筒１２と、第１内筒１２に嵌合し、第２部位に連結される回転不能の第１外筒１３と、第１内筒１２と第１外筒１３の間の間隙に充填された粘性体１４と、第１内筒１２と連動して回転する第２内筒２２と、第２内筒２２に対向する不動の第２外筒２３と、第２内筒２２と第２外筒２３の間に配置され、磁界内を回転する第２内筒２２に、その回転と反対方向の、渦電流によるローレンツ力を発生させる複数の永久磁石２４と、を備える。【選択図】図３
VISCOUS DAMPER
粘性ダンパ
NAKAMINAMI SHIGEKI (Autor:in) / KIDA HIDENORI (Autor:in) / IMANISHI KENJI (Autor:in) / NOGAMI YUTAKA (Autor:in) / MASUI RYOSUKE (Autor:in)
29.08.2019
Patent
Elektronische Ressource
Japanisch