The patch effect on the vibro-acoustic coupling of an irregular enclosure backed with a PZT-bonded panel

Li, Y Y

doi:10.1088/0964-1726/20/6/067001

Cited by 4 publications

(4 citation statements)

References 38 publications

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“…Finally, based on the displacement continuity between the mass and the membrane on every collocation point, we have . (10) Substituting Eqs. ( 5) -( 9) into Eq.…”

Section: A Eigenvalue Problem Of the Mammentioning

confidence: 99%

“…[7][8] It was realized that the added small mass loadings can significantly affect vibration behaviors and acoustic transmission properties of the membrane, 9 which provided many interesting potential applications in sound or noise control schemes. 10 However, compared with vibroacoustic studies of the pure membranes, studies on membranes with distributed masses are not well established because of the difficulty from its complex multiconnected boundary conditions. The prototype proposed by Yang et al now is recast into more general concept of membranetype metametrials, 1,2 which have been suggested to possess excellent acoustic properties for lowfrequencies sound insulation.…”

Section: Introductionmentioning

confidence: 99%

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Analytical coupled vibroacoustic modeling of membrane-type acoustic metamaterials: Membrane model

Chen

Zhou

et al. 2014

The Journal of the Acoustical Society of America

131

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Membrane-type Acoustic Metamaterials (MAMs) have demonstrated unusual capacity in controlling low-frequency sound transmission/reflection. In this paper, an analytical vibroacoustic membrane model is developed to study sound transmission behavior of the MAM under a normal incidence. The MAM is composed of a prestretched elastic membrane with attached rigid masses. To accurately capture finite-dimension rigid mass effects on the membrane deformation, the point matching approach is adopted by applying a set of distributed point forces along the interfacial boundary between masses and the membrane. The accuracy and capability of the theoretical model is verified through the comparison with the finite element method. In particular, microstructure effects such as weight, size and eccentricity of the attached mass, pretension and thickness of the membrane on the resulting transmission peak and dip frequencies of the MAM are quantitatively investigated. New peak and dip frequencies are found for the MAM with one and multiple eccentric attached masses. The developed model can be served as an efficient tool for design of such membrane-type metamaterials.

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“…Finally, based on the displacement continuity between the mass and the membrane on every collocation point, we have . (10) Substituting Eqs. ( 5) -( 9) into Eq.…”

Section: A Eigenvalue Problem Of the Mammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical coupled vibroacoustic modeling of membrane-type acoustic metamaterials: Membrane model

Chen

Zhou

et al. 2014

The Journal of the Acoustical Society of America

131

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“…Static and dynamic behaviors of the beams with segmented piezoelectric actuators are modeled theoretically, and verified by tests (Crawley and De Luis, 1987), and extended to isotropic and anisotropic plates (Crawley and Lazarus, 1991). Dynamic and static analyses of isotropic and laminated composite plates with piezoelectric actuators/sensors are presented (Koshigoe and Murdock, 1993;Kozupa and Wiciak, 2010;Li, 2011;Liew et al, 2004;Reddy, 1999;Yang and Zhang, 2006). Active random vibration controls of the isotropic and laminated composite plates/shells using piezoelectric actuators/sensors are studied (Dogan and Vaicaitis, 1999;Poulin and Vaicaitis, 2004;Wang and Vaicaitis, 1998;Wei and Vaicaitis, 1997).…”

Section: Introductionmentioning

confidence: 99%

Active vibration control of functionally graded plates under random excitation

Doğan

2014

Journal of Intelligent Material Systems and Structures

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In this study, the active control of the nonlinear vibration of the functionally graded material plate under random excitation is presented. The functionally graded material plates considered are mixture of two materials such as metal and ceramic. The mechanical properties of the functionally graded material plate are graded in the thickness direction only according to a simple power-law distribution in terms of volume fraction of constituents. The temperature dependencies of the constituents of the functionally graded material plates are also considered. The plate governing equations are due to the classical plate theory with von Karman-type geometric nonlinearities. Discrete piezoelectric materials are symmetrically bonded to top and bottom surfaces of the functionally graded material plate as sensors and actuators. A velocity feedback control technique is employed. The external pressure is considered as stationary Gaussian random process and simulated by using Monte Carlo technique. Parametric studies are conducted to investigate the viability of the lead zirconate titanate sensors/actuators to control the nonlinear random vibrations of the functionally graded material plates.

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“…In theory, the acoustic behavior in an enclosed space has been well studied. Different boundary conditions, such as rectangular and cylindrical cavity shape or irregular enclosures all show significant effects on the distribution of the internal acoustic pressure [ 10 – 13 ]. Thus, the vibratory structure in an enclosed space is susceptible to variation of the boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

Structural-Acoustic Coupling Effects on the Non-Vacuum Packaging Vibratory Cylinder Gyroscope

et al. 2013

Sensors

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The resonant shells of vibratory cylinder gyroscopes are commonly packaged in metallic caps. In order to lower the production cost, a portion of vibratory cylinder gyroscopes do not employ vacuum packaging. However, under non-vacuum packaging conditions there can be internal acoustic noise leading to considerable acoustic pressure which is exerted on the resonant shell. Based on the theory of the structural-acoustic coupling, the dynamical behavior of the resonant shell under acoustic pressure is presented in this paper. A finite element (FE) model is introduced to quantitatively analyze the effect of the structural-acoustic coupling. Several main factors, such as sealing cap sizes and degree of vacuum which directly affect the vibration of the resonant shell, are studied. The results indicate that the vibration amplitude and the operating frequency of the resonant shell will be changed when the effect of structural-acoustic coupling is taken into account. In addition, an experiment was set up to study the effect of structural-acoustic coupling on the sensitivity of the gyroscope. A 32.4 mV/°/s increase of the scale factor and a 6.2 Hz variation of the operating frequency were observed when the radial gap size between the resonant shell and the sealing cap was changed from 0.5 mm to 20 mm.

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The patch effect on the vibro-acoustic coupling of an irregular enclosure backed with a PZT-bonded panel

Cited by 4 publications

References 38 publications

Analytical coupled vibroacoustic modeling of membrane-type acoustic metamaterials: Membrane model

Analytical coupled vibroacoustic modeling of membrane-type acoustic metamaterials: Membrane model

Active vibration control of functionally graded plates under random excitation

Structural-Acoustic Coupling Effects on the Non-Vacuum Packaging Vibratory Cylinder Gyroscope

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