Performance characteristics of the magnetic constrained layer damping

Article type: Research Article

Authors: A. Baz, | S. Poh,

Affiliations: Mechanical Engineering Department, University of Maryland, College Park, MD 20742, USA

Abstract: A new class of surface damping treatment is proposed to provide effective means for attenuating undesirable structural vibrations. The proposed treatment relies in its operation on the use of smart damping treatments which consist of integrated arrays of constrained visco-elastic damping layers that are controlled passively by a specially arranged network of permanent magnets. The interaction between the magnets and the visco-elastic layers aims at enhancing the energy dissipation characteristics of the damping treatments. In this manner, it would be possible to manufacture structures that are light in weight which are also capable of meeting strict constraints on structural vibration when subjected to unavoidable disturbances. Emphasis is placed here on introducing the concept and the basic performance characteristics of this new class of smart Magnetic Constrained Layer Damping (MCLD) treatments. Comparisons are also presented with conventional Passive Constrained Layer Damping (PCLD) in order to determine the merits and limitation of the MCLD treatments.

Keywords: passive constrained layer damping, magnetic constrained layer damping and permanent magnets

Journal: Shock and Vibration, vol. 7, no. 2, pp. 81-90, 2000