Vibration attenuation of panel structures by optimally shaped viscoelastic coating with added weight considerations

Li, Cheng; Lapointe, R.

doi:10.1016/0263-8231(95)93617-u

Cited by 18 publications

(6 citation statements)

References 13 publications

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“…The whole system is symmetrical with respect the mid-line of the beam. The extended platform end of the beam is free and the other end is elastically supported by artificial translational and rotational springs [20,21], the stiffness of which can be adjusted to achieve various boundary conditions. The damping of both the beam and the damping layer are taken into account through complex stiffness E, i.e., E =E (1+iη), where η is the damping loss factor, assigned differently to the beam and the damping layer.…”

Section: Modelling Of a Beam With A Modified Thickness Profile And Exmentioning

confidence: 99%

Enhanced Acoustic Black Hole effect in beams with a modified thickness profile and extended platform

Tang

2017

Journal of Sound and Vibration

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The phenomenon of Acoustics Black Hole (ABH) benefits from the bending wave propagating properties inside a thin-walled structure with power-law thickness variation to achieve zero reflection when the structural thickness approaches zero in the ideal scenario.However, manufacturing an ideally tailored power-law profile of a structure with embedded ABH feature can hardly be achieved in practice. Past research showed that the inevitable truncation at the wedge tip of the structure can significantly weaken the expected ABH effect by creating wave reflections. On the premise of the minimum achievable truncation thickness by the current manufacturing technology, exploring ways to ensure and achieve better ABH effect becomes important. In this paper, we investigate this issue by using a previously developed wavelet-decomposed semi-analytical model on an Euler-Bernoulli beam with a modified power-law profile and an extended platform of constant thickness. Through comparisons with the conventional ABH profile in terms of system loss factor and energy distribution, numerical results show that the modified thickness profile brings about a systematic increase in the ABH effect at mid-to-high frequencies, especially when the truncation thickness is small and the

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Section: Modelling Of a Beam With A Modified Thickness Profile And Exmentioning

confidence: 99%

Enhanced Acoustic Black Hole effect in beams with a modified thickness profile and extended platform

Tang

2017

Journal of Sound and Vibration

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“…The whole system is assumed symmetrical with respect the mid-line of the beam. The non-uniform end of the beam is free and the other end is elastically supported by artificial translational and rotational springs [19,20], the stiffness of which can be adjusted to achieve various boundary conditions. For example, if the stiffnesses of the translational and rotational springs are both set to be extremely high compared with that of the beam, a clamped boundary is achieved.…”

Section: Modeling Proceduresmentioning

confidence: 99%

Characterization of acoustic black hole effect using a one-dimensional fully-coupled and wavelet-decomposed semi-analytical model

Tang

et al. 2016

Journal of Sound and Vibration

189

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“…The procedure for deriving the generalized mass and stiffness matrices of the plate ͑i.e., the main structure͒ with boundary springs and generalized force are explained in Ref. 16. It should be noted that the effect of the auxiliary structures are modeled through the term E p cp , which should be further analyzed.…”

Section: Methodology and Coupling Representationmentioning

confidence: 99%

Vibration analysis of line-coupled structures using a coupling load decomposition technique

Hatam

Rancourt

1998

The Journal of the Acoustical Society of America

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A new substructuring technique is proposed to perform vibration analysis of line-coupled structures. In dividing the whole structure into a master structure and several auxiliary structures, a variational formulation is used to model the master structure, enabling one to introduce the effects of all auxiliary structures by using their compliance characteristics at several observation points along the junction. Continuous functions of the compliance are obtained via a regression analysis. Given the problem of using the compliance inverse to attain a straightforward formulation, a ''Coupling Load Decomposition'' technique is proposed since a direct formulation using the compliance inverse is not feasible. By decomposing the interactive load between substructures, relations with displacement decomposition of the master structure can be found. This new formulation permits the direct use of the compliance of the junction, which may be obtained analytically, numerically, or experimentally. Numerical examples using both calculated and experimentally measured compliance data are given. Simulation results are also compared to those obtained experimentally, showing good agreement in low-and medium-frequency ranges.

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Vibration attenuation of panel structures by optimally shaped viscoelastic coating with added weight considerations

Cited by 18 publications

References 13 publications

Enhanced Acoustic Black Hole effect in beams with a modified thickness profile and extended platform

Enhanced Acoustic Black Hole effect in beams with a modified thickness profile and extended platform

Characterization of acoustic black hole effect using a one-dimensional fully-coupled and wavelet-decomposed semi-analytical model

Vibration analysis of line-coupled structures using a coupling load decomposition technique

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