Vibro-Acoustic Metamaterials for Improved Interior NVH Performance in Vehicles

Belle, Lucas Van; Sangiuliano, Luca; Filho, Noé Geraldo Rocha de Melo; Villanueva, Matias Clasing; Boukadia, Régis Fabien; Ahsani, Sepide; Pires, Felipe Alves; Zhang, Ze; Claeys, Claus; Deckers, Elke; Pluymers, Bert; Desmet, Wim

doi:10.1007/978-3-030-51044-2_2

Cited by 2 publications

(2 citation statements)

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“…More complex structures were considered by [3,4,5,6] who computed dispersion relations for wave propagation in two-dimensional periodic structures by the Wave Finite Element method (WFE). Most of these authors considered a reduced model obtained by the Craig-Bampton method while in [7,8,9,10] the reduction of the boundary degrees of freedom was considered in addition and [11] projected the mass and stiffness matrices on a reduced set of Bloch modes.…”

Section: Introductionmentioning

confidence: 99%

Computation of the dynamic response of finite two-dimensional periodic structures

Duhamel

2024

J. Phys.: Conf. Ser.

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The study of periodic media is mainly focused on one-dimensional periodic structures (periodic along one direction), to determine the dispersion curves or for the calculation of the response to an external excitation. Effective methods such as the Wave Finite Element (WFE) have been obtained for such computations. Two-dimensional periodic media are more complex to analyse but dispersion curves can be obtained rather easily. Obtaining their response to an excitation is much more difficult and the results mainly concern infinite media while for finite media, few results are available. In this communication, the response of finite two-dimensional periodic structures to an excitation is studied by limiting oneself to structures described by a scalar variable (acoustic, thermal, membrane behaviour) and having symmetries. Using the WFE for a rectangular substructure and imposing the wavenumber in one direction, we can calculate the wavenumbers and mode shapes associated with propagation in the perpendicular direction. By building solutions with null forces on parallel boundaries, we can decouple the waves in the two directions parallel to the sides of the rectangle and solve each case by a FFT. Summing the contributions of all these waves gives the global solution with a low computing time even for a large number of substructures. Examples are given for the case of a two-dimensional membrane.

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Section: Introductionmentioning

confidence: 99%

Computation of the dynamic response of finite two-dimensional periodic structures

Duhamel

2024

J. Phys.: Conf. Ser.

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“…The potential of resonant metamaterials has been attracting attention in the automotive sector [19] for targeting low-frequency airborne and structure-borne noise. Numerical investigations of the vibro-acoustic attenuation in the interior compartment of a vehicle using simple mass-spring resonant metamaterials are found in the works of Wu et al [20] and Wu et al [21].…”

Section: Introductionmentioning

confidence: 99%