Non-proportional damping and semi-active control


Journal Article

Electro-rheological (ER) and magneto-rheological (MR) materials exhibit variable stiffness and damping properties when subjected to strong electric or magnetic fields. While pre-yield visco-elasticity is a very important feature of these materials when subjected to oscillatory shears, the resultant stresses are primarily dissipative. Including an ER and MR device in a lumped-parameter structure (i.e., a building frame), results in large damping forces where the devices connect to the frame. Such structures are therefore not proportionally damped. This paper examines non-proportional damping in the context of ER and MR devices for controlling base-excited structures.

Duke Authors

Cited Authors

  • Doke, NS; Gavin, HP

Published Date

  • January 1, 1999

Published In

Volume / Issue

  • 1 /

Start / End Page

  • 431 - 436

International Standard Serial Number (ISSN)

  • 1046-6770

Citation Source

  • Scopus