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Liquid Inertia Damper Having a Screw Shaped Piston

[+] Author Affiliations
Taichi Matsuoka

Meiji University, Kawasaki, Kanagawa, Japan

Paper No. PVP2012-78419, pp. 3-6; 4 pages
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5507-2
  • Copyright © 2012 by ASME


In this paper authors propose a liquid inertia damper that has a screw shaped piston in order to have effect of a series inertia mass. The damper consists of a piston and a cylinder, a screw shaped piston. Water is filled in the cylinder. The peripheral gap of the screw can act as an orifice of a by-pass pipe, and an inertia force is produced by a liquid flow through the gap. In order to confirm the inertia force, a test damper is manufactured, and resisting force characteristics are measured. It is apparent from test results that the damper can have a sum of the inertia force and nonlinear damping force. The series inertia mass is depended on a relation between a diameter of the cylinder and a gap of the screw. To confirm the vibration reduction, harmonic frequency response of one-degree-of-freedom system with the liquid inertia damper is calculated. Finally, the effects of vibration suppression are confirmed numerically.

Copyright © 2012 by ASME



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