A basic study on dynamic characteristics of MR dampers

Hiroshi Sodeyama, Katsuaki Sunakoda, Kohei Suzuki, J. David Carlson, B. F. Spencer

Research output: Contribution to journalConference articlepeer-review


In recent years in Japan, many studies have been carried out on MR dampers as developments of semi-active vibration control devices. The MR damper uses a magneto-rheological (MR) fluid as an operating fluid. MR fluids are one of the controllable fluids that respond to external fields (magnetic fields / electric fields). MR fluids drastically alter their rheological properties in accordance with the strength of the applied magnetic field. MR dampers incorporate electromagnets that induce the required magnetic fields inside the dampers. Damping force generated by the MR damper is therefore controllable by adjusting only the electric current supplied to the electromagnets. This paper discusses the design theory of MR dampers for realizing the required force as a basic study on MR dampers. The state of the MR fluid flow inside the damper is considered on the basis of the fluid dynamics. Design formulas are derived for each condition, i.e., with and without a magnetic field, and their practicability is verified by comparison with experimental test results using a typical commercial MR damper.

Original languageEnglish (US)
Pages (from-to)115-120
Number of pages6
JournalAmerican Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
Issue number2
StatePublished - 2001
Externally publishedYes
Event2001 ASME Pressure Vessels and Piping Conference - Atlanta, GA, United States
Duration: Jul 22 2001Jul 26 2001

ASJC Scopus subject areas

  • Mechanical Engineering


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