Linear Friction Damper Consisted of Cylindrical Friction Block and Inclined Lever : Investigation of Fundamental Property(<Special Issue>Dynamics & Design Conference 2009)

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  • 円柱形摩擦ブロックと傾斜レバーで構成された比例摩擦ダンパに関する研究 : 基本的特性の検討(<特集>D&D2009)
  • 円柱形摩擦ブロックと傾斜レバーで構成された比例摩擦ダンパに関する研究(基本的特性の検討)
  • エンチュウケイ マサツ ブロック ト ケイシャ レバー デ コウセイ サレタ ヒレイ マサツ ダンパ ニ カンスル ケンキュウ キホンテキ トクセイ ノ ケントウ

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In order to protect precise machinery from external vibration, various types of vibration isolation system have been proposed by many researchers. For the passive isolation system, a friction damper is often used because it is simple, inexpensive and reliable. However, the ordinary friction damper of constant friction force has performance limitation, because the isolation characteristic declines when the friction force is large, while resonant peak becomes large when the friction force is small. Furthermore, the displacement remains apart from the equilibrium position after the disturbance disappeared. These characteristics are disadvantageous when the precise position recovery is required. In order to overcome above drawbacks of the ordinary friction damper, the new type of friction damper is proposed in this paper. In the new friction damper, the friction lever mechanism is devised to make the magnitude of the friction force proportional to the relative displacement. This is achieved by contacting the inclined lever with rotational spring to the cylindrical block. When the cylindrical block moves and the angle of inclination of the lever varies, the normal and frictional forces at the contact surface vary according to the displacement of the cylindrical block.

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