流体の慣性質量を利用した振動低減装置(機械力学,計測,自動制御)

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タイトル別名
  • Vibration Suppression Device that Utilizes Inertia Mass by Fluid(Mechanical Systems)
  • 流体の慣性質量を利用した振動低減装置
  • リュウタイ ノ カンセイ シツリョウ オ リヨウ シタ シンドウ テイゲン ソウチ

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In this paper, authors propose a vibration suppression device that utilizes inertia mass by fluid in order to obtain effects of vibration cut-off or suppression. The device consists of a cylinder, a piston and a by-pass pipe. The inertia mass is generated by a movement of the fluid in the by-pass pipe during excitation, and magnified by not only ratio of inner diameter between the cylinder and the by-pass pipe, and also a weight ratio of the fluid. The test device was manufactured, and resisting force characteristics are measured in cases of water, turbine oil, and MR fluid filled in the by-pass pipe, respectively. It is clarified from the results that variable inertia mass can be derived in case of the MR fluid when magnetic flux is applied. In order to confirm the effect of vibration suppression, experiments of frequency response and seismic response of one degree of freedom system with the test device are carried out by using a shaking table. Acceleration and displacement can be isolated from input excitation, and resonance frequency can be shifted toward low frequency by the inertia mass. Vibration suppressions of the device are confirmed theoretically and experimentally.

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