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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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Journal ArticleDOI
TL;DR: In this article, the results of experimental and analytical studies on the vibration characteristics of a clamped-clamped plate which is partially and totally filled with an electro-rheological (ER) fluid are presented.
Abstract: Constrained layer damping (CLD) technique employs solid viscoelastic materials for controlling the vibration characteristics of structures. The effectiveness of the CLD treatment depends on the dynamic mechanical properties and geometrical dimensions of the viscoelastic and constraining layers. It also depends on the percentage coverage of the structure by the viscoelastic and constraining layers. Since the complex dynamic properties of electro-rheological (ER) fluids vary between those of viscoelastic liquids (at low levels of electric field strengths) and those of viscoelastic solids (at high levels of electric field strengths), ER fluids can be used in an adaptive form for CLD applications. The results of experimental and analytical studies on the vibration characteristics of a clamped-clamped plate which is partially and totally filled with an ER fluid are presented. The ER fluid employed is a mixture of 50 wt% of an analytical reagent grade of starch dissolved in 50 wt% of a silicone oil. It is shown...

38 citations

Journal ArticleDOI
TL;DR: In this paper, the performance of different viscoelastic materials (VEM) is investigated using constrained layer damping (CLD) treatment, and the amount of damping of structure is measured by half-power bandwidth method.

38 citations

Journal ArticleDOI
TL;DR: In this article, a qualitative comparison between a piezoelectric vibration absorber and a constrained layer damping treatment is presented, where the damping is concentrated to a single mode by constructing a picolectric absorber.
Abstract: A qualitative comparison between a piezoelectric vibration absorber and a constrained layer damping treatment is presented. Piezoelectric materials convert mechanical strains into electrical charge. Dissipation of the charge results in attenuation of vibration. The damping is concentrated to a single mode by constructing a piezoelectric absorber. The damped vibration absorber is comprised of the piezoelectric material and a passive electronic shunt. Previous research has applied the piezoelectric absorber to one-dimensional structures. This paper applies the absorber to a two-dimensional planar problem. The simple mathematical description of the absorber is modified for the two-dimensional problem. An analytical means of estimating the effectiveness of the piezoelectric absorber is derived. The effectiveness is estimated for an electronics chassis box subjected to random excitation. A typical constrained layer damping treatment is also analytically designed for the problem. The piezoelectric absorber and the constrained layer damping treatment are experimentally applied to identical boxes. Results show that the piezoelectric absorber can provide vibration suppression comparable to that obtained by the constrained layer damping treatment.

37 citations

Journal ArticleDOI
TL;DR: In this paper, a model of fiber reinforced magneto-electro-elastic or multiferroic fibrous composite plates using active constrained layer damping treatment has been investigated.

37 citations

Journal ArticleDOI
TL;DR: In this paper, an 18-node degenerate element with nine nodes located on the base shell structure and nine nodes on the constraining layer is presented for constrained layer damping treatments. But, the element is not suitable for either plate or shell structures.
Abstract: An isoparametric, degenerate element for constrained layer damping treatments is presented The element is valid for either plate or shell structures The element is an 18-node degenerate element with nine nodes located on the base shell (or plate) structure and nine nodes on the constraining layer Each node has five degrees of freedom: translations in x,y, and z and bending rotations α and β about the midsurface where the node is located The displacement field of the viscoelastic layer is interpolated linearly from the nodal displacements; therefore, the viscoelastic layer allows both shear and normal deformations The base shell (or plate) structure and the constraining layer can be linearly elastic or piezoelectric for passive or active applications The viscoelastic layer is assumed to be linearly viscoelastic The equation of motion is derived through use of the principle of virtual work For thin plate structures, numerical results show that the isoparametric element can predict natural frequencies, loss factors, and mechanical impedances that are as accurate as NASTRAN with substantially fewer elements For thin shell structures, locking and spurious modes need to be resolved to yield reasonable results

37 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202310
202227
202123
202020
201927
201826