Topic
Constrained-layer damping
About: Constrained-layer damping is a research topic. Over the lifetime, 795 publications have been published within this topic receiving 15758 citations.
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TL;DR: In this paper, an analysis of active constrained layer damping (ACLD) of geometrically nonlinear vibrations of doubly curved sandwich shells with facings composed of fuzzy fiber reinforced composite (FFRC) is concerned.
40 citations
TL;DR: In this article, the vibration behavior and control of a clamped-free rotating flexible cantilever arm with fully covered active constrained layer damping (ACLD) treatment are investigated.
39 citations
TL;DR: In this article, the performance of the active constrained layer damping (ACLD) treatment for active control of thin laminated cylindrical shells conveying fluid has been investigated, and the constraining layer of the ACLD treatment has been considered to be made of vertically or obliquely reinforced 1-3 piezoelectric composite (PZC) materials.
39 citations
TL;DR: In this paper, the influence of attachments and substructure on the vibration of a plate is investigated using an energy viewpoint with experimental data, where the normal velocity of each plate, measured with a laser vibrometer or in some cases obtained from analytic calculation, is used to calculate the structural intensity and force distribution.
Abstract: The influence of attachments and substructure on the vibration of a plate is a very important problem in noise and vibration control. This paper presents several examples of using an energy viewpoint with experimental data. The normal velocity of each plate, measured with a laser vibrometer or in some cases obtained from analytic calculation, is then used to calculate the structural intensity and force distribution. The structural intensity and force distribution are then used to locate single and double forces applied to a plate with some limitations. In addition, a rib attached to a plate and a constrained layer damping patch attached to a plate is studied. The energy absorbed by the rib and the force exerted by the rib in response to the waves incident on the rib are discussed. Results also show that a constrained layer damping patch is more effective in absorbing shear and bending vibrational energy than in absorbing twisting energy and that the damping patch does not apply a normal reaction force to the plate.
39 citations
TL;DR: In this paper, a viscoelastic damping model of cylindrical hybrid panels with co-cured, free and constrained layers was developed and investigated by using the refined finite element method based on the layerwise shell theory.
Abstract: The viscoelastic damping model of the cylindrical hybrid panels with co-cured, free and constrained layers has been developed and investigated by using the refined finite element method based on the layerwise shell theory. The transverse shear and normal strains and the curved geometry are exactly taken into account in the present layerwise shell model, which can depict the zig-zag in-plane and out-of-plane displacements. The damped natural frequencies, modal loss factors and frequency response functions of cylindrical viscoelastic hybrid panels are compared with those of the base composite panel without a viscoelastic layer. The difference in the free vibration and damping of the thin and thick composite laminates and the viscoelastic sandwiched beam between full and partial layerwise theories is verified by comparison with the published results. Various damping characteristics of cylindrical hybrid panels with free viscoelastic layer, constrained layer damping, and co-cured sandwich laminates are investigated. Present results show that the full layerwise damping model accurately predicted the vibration and damping of the cylindrical hybrid panels with viscoelastic layers.
39 citations