Development and performance evaluation of an MR squeeze-mode damper. (7th October 2015)

• Record Type: Journal Article
• Authors: Sapiński, Bogdan; Gołdasz, Janusz
• Is Part Of: Smart materials and structures. Volume 24:Number 11(2015:Nov.)
• Publication Date: 2015-10-07
• Subjects: magnetorheological damper -- squeeze-mode -- performance evaluation; Smart materials -- Periodicals; Strucural design -- Periodicals; 620.11
• DOI: 10.1088/0964-1726/24/11/115007
• Languages: English
• ISSNs: 0964-1726

Abstract

Abstract: In this paper the authors present results of a magnetorheological (MR) damper prototype development and performance evaluation study. The damper is a device functioning in the so-called squeeze-mode of MR fluid flow regime of operation. By principle, in a squeeze-mode damper the control (working) gap height varies according to the prescribed displacement or force input profile. Such hardware has been claimed to be well suited to small-amplitude vibration damping applications. However, it is still in its infancy. Its potential seems appealing yet unclear. Accordingly, the authors reveal performance figures of the damper complemented by numerical finite-element simulations of the electro-magnetic circuit of the device. The numerical results are presented in the form of maps of averaged magnetic flux density versus coil current and gap height as well as magnetic flux, inductance, and cogging force calculations, respectively. The simulated data are followed by experimental evaluation of the damper performance incorporating plots of force versus piston displacement (velocity) across a prescribed range of excitation inputs. Moreover, some insight into transient (unsteady) characteristics of the device is provided through testing results involving transient currents.