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A Study on Controllable Aseismic Device With Inertia Mass and MR Fluid

[+] Author Affiliations
Hiroshi Sodeyama, Kazuhiko Shibata, Yusuke Sato

Sanwa Tekki Corporation, Utsunomiya, Japan

Tetsuya Tomizawa

Kozo Keikaku Engineering Inc., Tokyo, Japan

Hideo Fujitani

Kobe University, Kobe, Japan

Paper No. PVP2013-97650, pp. V008T08A006; 6 pages
doi:10.1115/PVP2013-97650
From:
  • ASME 2013 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Paris, France, July 14–18, 2013
  • Conference Sponsors: Pressure Vessels and Piping Division, Nondestructive Evaluation Engineering Division
  • ISBN: 978-0-7918-5574-4
  • Copyright © 2013 by ASME

abstract

The authors have developed a new aseismic device, which has a ball screw and rotational mass. It not only generates the resistive inertial force originating in the rotational mass but also dissipates the energy of vibration through a viscous damping mechanism. Furthermore, the damping capability of the device can be controlled externally with an applied magnetic field. A magneto-rheological (MR) fluid is used to change the dynamic characteristics of the device. Through comprehensive experimental testing of a prototype device, the dynamic characteristics of the device have been verified. The test results show that the force-displacement relationship varies with an applied magnetic condition. Only a few amperes of electric current is required to generate a magnetic field effective for the prototype device with a capacity of 100kN.

Copyright © 2013 by ASME

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