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Title:
MASS DAMPER
Document Type and Number:
Japanese Patent JP2019157947
Kind Code:
A
Abstract:
To provide a mass damper in which an inertial mass element and an attenuation element are connected in series, the attenuation element has small temperature dependence and repetition dependence, attenuation characteristic depends on speed and an axial force of the mass damper can be appropriately restricted.SOLUTION: A mass damper 1A includes a nut 11c of which one end part is screwed with a screw shaft 11a connected to a first portion in a system containing a structure 3 via a ball 11b, an inner cylinder 12 of which one end part is connected to a second portion and supports the nut 11c freely rotatably and a rotary mass 13 arranged so as to cover the nut 11c and an outer circumference of the inner cylinder 12. Therein, one side of the nut 11c and the rotary mass 13 is constituted with ferromagnetic material, the other side is constituted with electrically conductive material, and a plurality of permanent magnets 15 which are arranged along circumferential direction on one side of the nut 11c and the rotary mass 13 and generates Lorentz force according to eddy current of a direction opposite to the rotation onto the nut 11c rotated in a magnetic field are provided on the ferromagnetic body side.SELECTED DRAWING: Figure 2

Inventors:
NAKAMINAMI SHIGEKI
KIDA HIDENORI
IMANISHI KENJI
MASUI RYOSUKE
Application Number:
JP2018043077A
Publication Date:
September 19, 2019
Filing Date:
March 09, 2018
Export Citation:
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Assignee:
ASEISMIC DEVICES CO LTD
NIPPON STEEL CORP
International Classes:
F16F15/02; E04H9/02; F16F15/03
Domestic Patent References:
JP2014132135A2014-07-17
JPH07229536A1995-08-29
JP2017511867A2017-04-27
Attorney, Agent or Firm:
Tomoo Takahashi
Koji Arai



 
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