Institute of Fundamental Technological Research
Polish Academy of Sciences

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M.A. Galland

École Centrale de Lyon (FR)


Recent publications
1.  Zieliński T.G., Opiela K.C., Pawłowski P., Dauchez N., Boutin T., Kennedy J., Trimble D., Rice H., Van Damme B., Hannema G., Wróbel R., Kim S., Ghaffari Mosanenzadeh S., Fang N.X., Yang J., Briere de La Hosseraye B., Hornikx M.C.J., Salze E., Galland M.-A., Boonen R., Carvalho de Sousa A., Deckers E., Gaborit M., Groby J.-P., Reproducibility of sound-absorbing periodic porous materials using additive manufacturing technologies: round robin study, Additive Manufacturing, ISSN: 2214-8604, DOI: 10.1016/j.addma.2020.101564, Vol.36, pp.101564-1-24, 2020

Abstract:
The purpose of this work is to check if additive manufacturing technologies are suitable for reproducing porous samples designed for sound absorption. The work is an inter-laboratory test, in which the production of samples and their acoustic measurements are carried out independently by different laboratories, sharing only the same geometry codes describing agreed periodic cellular designs. Different additive manufacturing technologies and equipment are used to make samples. Although most of the results obtained from measurements performed on samples with the same cellular design are very close, it is shown that some discrepancies are due to shape and surface imperfections, or microporosity, induced by the manufacturing process. The proposed periodic cellular designs can be easily reproduced and are suitable for further benchmarking of additive manufacturing techniques for rapid prototyping of acoustic materials and metamaterials.

Keywords:
porous materials, designed periodicity, additive manufacturing, sound absorption

Affiliations:
Zieliński T.G. - IPPT PAN
Opiela K.C. - IPPT PAN
Pawłowski P. - IPPT PAN
Dauchez N. - Sorbonne University Alliance (FR)
Boutin T. - Sorbonne University Alliance (FR)
Kennedy J. - Trinity College (IE)
Trimble D. - Trinity College (IE)
Rice H. - Trinity College (IE)
Van Damme B. - other affiliation
Hannema G. - other affiliation
Wróbel R. - other affiliation
Kim S. - other affiliation
Ghaffari Mosanenzadeh S. - other affiliation
Fang N.X. - other affiliation
Yang J. - Clemson University (US)
Briere de La Hosseraye B. - other affiliation
Hornikx M.C.J. - other affiliation
Salze E. - other affiliation
Galland M.-A. - École Centrale de Lyon (FR)
Boonen R. - other affiliation
Carvalho de Sousa A. - other affiliation
Deckers E. - Katholieke Universiteit Leuven (BE)
Gaborit M. - other affiliation
Groby J.-P. - other affiliation
2.  Zieliński T.G., Galland M.A., Ichchou M., Fully coupled finite-element modeling of active sandwich panels with poroelastic core, JOURNAL OF VIBRATION AND ACOUSTICS-TRANSACTIONS OF THE ASME, ISSN: 1048-9002, DOI: 10.1115/1.4005026, Vol.134, No.2, pp.021007-1-10, 2012

Abstract:
Active sandwich panels are an example of smart noise attenuators and a realization of hybrid active-passive approach for the problem of broadband noise reduction. The panels are composed of thin elastic faceplates linked by the core of a lightweight absorbent material of high porosity. Moreover, they are active, so piezoelectric actuators in the form of thin patches are fixed to their faceplates. Therefore, the passive absorbent properties of porous core, effective at high and medium frequencies, can be combined with the active vibroacoustic reduction necessary in a low frequency range. Important convergence issues for fully coupled finite-element modeling of such panels are investigated on a model of a disk-shaped panel under a uniform acoustic load by plane harmonic waves, with respect to the important parameter of the total reduction of acoustic transmission. Various physical phenomena are considered, namely, the wave propagation in a porous medium, the vibrations of elastic plate and the piezoelectric behavior of actuators, the acoustics-structure interaction and the wave propagation in a fluid. The modeling of porous core requires the usage of the advanced biphasic model of poroelasticity, because the vibrations of the skeleton of porous core cannot be neglected; they are in fact induced by the vibrations of the faceplates. Finally, optimal voltage amplitudes for the electric signals used in active reduction, with respect to the relative size of the piezoelectric actuator, are computed in some lower-to-medium frequency range.

Keywords:
Active sandwich panels, Multiphysics, Vibroacoustics, Poroelasticity, Piezoelectricity

Affiliations:
Zieliński T.G. - IPPT PAN
Galland M.A. - École Centrale de Lyon (FR)
Ichchou M. - École Centrale de Lyon (FR)
3.  Batifol C., Zieliński T.G., Ichchou M., Galland M.A., A finite-element study of a piezoelectric/poroelastic sound package concept, SMART MATERIALS AND STRUCTURES, ISSN: 0964-1726, DOI: 10.1088/0964-1726/16/1/021, Vol.16, No.1, pp.168-177, 2007

Abstract:
This paper presents a complete finite-element description of a hybrid passive/active sound package concept for acoustic insulation. The sandwich created includes a poroelastic core and piezoelectric patches to ensure high panel performance over the medium/high and low frequencies, respectively. All layers are modelled thanks to a Comsol environment*. The piezoelectric/elastic and poroelastic/elastic coupling are fully considered. The study highlights the reliability of the model by comparing results with those obtained from the Ansys finite-element software and with analytical developments. The chosen shape functions and mesh convergence rate for each layer are discussed in terms of dynamic behaviour. Several layer configurations are then tested, with the aim of designing the panel and its hybrid functionality in an optimal manner. The differences in frequency responses are discussed from a physical perspective. Lastly, an initial experimental test shows the concept to be promising.

Keywords:
Poroelasticity, Piezoelectricity, Finite-element modelling, Acoustic insulation, Active-passive approach

Affiliations:
Batifol C. - other affiliation
Zieliński T.G. - IPPT PAN
Ichchou M. - École Centrale de Lyon (FR)
Galland M.A. - École Centrale de Lyon (FR)

Conference papers
1.  Zieliński T.G., Galland M.-A., Analysis of wave propagation and absorption at normal and oblique incidence in poroelastic layers with active periodic inclusions, e-FA2020, e-FORUM ACUSTICUM 2020, 2020-12-07/12-11, Lyon (FR), DOI: 10.48465/fa.2020.0541, pp.2825-2831, 2020

Abstract:
The paper presents numerical studies of wave propagation under normal and oblique incidence in sound-absorbing layers of poroelastic composites with active and passive inclusions embedded periodically along the composite layer surface. The purpose of active inclusions is to increase the mass-spring effect of passive inclusions attached to the viscoelastic skeleton of the poroelastic matrix of the composite in order to increase the dissipation of the energy of acoustic waves penetrating into such a layer of poroelastic composite. Finite element modelling is applied which includes the coupled models of Biot-Allard poroelasticity (for the poroelastic matrix), piezoelectricity and elastodynamics (for the active and passive inclusions, respectively), as well as the Helmholtz equation for the adjacent layer of air. The formulation based on the Floquet-Bloch theory is applied to allow for modelling of wave propagation at oblique incidence to the surface of the periodic composite layer. The actively exited piezoelectric inclusions may become additional (though secondary) sources for wave propagation. Therefore, a background pressure field in a wide adjacent air layer is used to simulate plane waves propagating from the specified direction, oblique or normal, onto the poroelastic layer surface, and a nonreflecting condition is applied on the external boundary of the air layer.

Affiliations:
Zieliński T.G. - IPPT PAN
Galland M.-A. - École Centrale de Lyon (FR)
2.  Zieliński T.G., Galland M.-A., Deckers E., Influencing the wave-attenuating coupling of solid and fluid phases in poroelastic layers using piezoelectric inclusions and locally added masses, ISMA 2018 / USD 2018, International Conference on Noise and Vibration Engineering / International Conference on Uncertainty in Structural Dynamics, 2018-09-17/09-19, Leuven (BE), pp.1195-1207, 2018

Abstract:
When airborne acoustic waves penetrate porous media their carrier becomes the air in pores, but also the solid skeleton - provided that it is sufficiently soft. Then, there is a coupled propagation of fluid-borne and solid-borne waves in a poroelastic medium. The coupling of fluid and solid phases of such media can be responsible for significantly better or weaker sound absorption in medium and lower frequency ranges. It has been observed that adding some well-localised small mass inclusions inside a poroelastic layer may improve its acoustic absorption in some medium frequency range, however, at the same time the absorption is usually decreased at some slightly higher frequencies. This situation can be improved by applying additionally an active approach using small piezoelectric inclusions which actively influence the vibrations of the solid skeleton with added masses, so that the interaction between the solid-borne and fluid-borne waves is always directed for a better mutual energy dissipation of the both types of waves.

Affiliations:
Zieliński T.G. - IPPT PAN
Galland M.-A. - École Centrale de Lyon (FR)
Deckers E. - Katholieke Universiteit Leuven (BE)
3.  Zieliński T.G., Galland M.A., Ichchou M.N., Further modeling and new results of active noise reduction using elasto-poroelastic panels, ISMA 2006, International Conference on Noise and Vibration Engineering, 2006-09-18/09-20, Louvain (BE), Vol.1, pp.309-319, 2006

Abstract:
The paper presents further development in modeling of active elasto-poroelastic sandwich panels. In fact, a new design of a demi-sandwich panel is proposed and analysed. A numerical model of panel is implemented in COMSOL Multiphysics environment using the most fundamental but very flexible Weak Form PDE Mode. Various physical problems are modeled using Finite Element Method: the wave propagation in acoustic and poroelastic medium, the vibrations of elastic plate, the piezoelectric behavior of actuator. All these problems interact. in the examined application of active panel. The presented results of FE analysis and some analytical solutions prove the necessity of modeling the panel's interaction with an acoustic medium. Again, confirmed is the fact that an active control is necessary for lower resonances while for the higher frequencies the passive reduction of vibroacoustic transmission performed by a well-designed poroelastic layer is sufficient.

Keywords:
Active sandiwch panels, Poroelasticity, Piezoelectricity, Vibroacoustics

Affiliations:
Zieliński T.G. - IPPT PAN
Galland M.A. - École Centrale de Lyon (FR)
Ichchou M.N. - École Centrale de Lyon (FR)
4.  Zieliński T.G., Galland M.A., Ichchou M., Active reduction of vibroacoustic transmission using elasto-poroelastic sandwich panels and piezoelectric materials, SAPEM'2005, Symposium on the Acoustics of Poro-Elastic Materials, 2005-12-07/12-09, Lyon (FR), pp.1-8, 2005

Abstract:
The paper addresses the issue of an active sandwich panel made of elastic faceplates and a poroelastic core. The panel is supposed to be active thanks to piezoelectric patches glued to the one of elastic layers. This piezoelectric actuator is used to excite the panel vibrations in the low frequency range with the aim to reduce the transmitted wave. A complete description of the sandwich behaviour is obtained using a finite element model implemented in FEMLAB environment. The poroelastic material is modeled using a recent formulation (by Atalla et al.) valid for harmonic oscillations, but the classical Biot formulation is also implemented. Coupling occurring between poroelastic material and plates, and between elastic plate and piezoelectric patches is fully considered. The achieved numerical model allows prediction of transmission coefficient for plane waves under normal incidence. Hence, some numerical experiments can be offered for multiple assembly configurations whose ultimate goal is to determine the best assembly and the best control strategy for reducing the transmission over a wide frequency range.

Keywords:
Poroelacticity, Piezoelectricity, Active vibroacoustic panles

Affiliations:
Zieliński T.G. - other affiliation
Galland M.A. - École Centrale de Lyon (FR)
Ichchou M. - École Centrale de Lyon (FR)

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