Olivier Doaré
Professor, ENSTA Paris, Unit of Mechanical Engineering
Associate Professor, École Polytechnique

828 boulevard des Maréchaux
91120 Palaiseau

Tel: +33 1 69 31 97 39



Research
Fluttering flag energy-harvesting

Flutter instability induces an energy transfer flow a flow to a structure that we investigated theoretically, numerically and experimentally. We showed how and why efficiency can be maximized.


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* G. Melilli, D. Gorse, A. Galifanova, O. Oral, E. Balanzat, O Doare, M Tabellout, M Bechelany, D Lairez, JE Wegrowe and MC Clochard, Enhanced Piezoelectric Response in Nanostructured Ni/PVDF Films, Journal of Material Science and Engineering, 1000444, 2018. PDF

* Y Xia, O Doaré and S Michelin, Fluid-solid-electric energy transport along piezoelectric flags, European Journal of Computational Mechanics, 154--171, 2017. PDF

* Y Xia, O Doaré and S Michelin, Electro-hydrodynamic synchronization of piezoelectric flags, Journal of Fluids and Structures, 398--410, 2016. PDF

* M Pneirua, S Michelin, D Vasic and O Doaré, Synchronized switch harvesting applied to piezoelectric flags, Smart Materials and Structures, 085004, 2016. PDF

* Y Xia, S Michelin and O Doaré, Fluid-Solid-Electric Lock-In of Energy-Harvesting Piezoelectric Flags, Physical Review Applied, 014009, 2015. PDF

* M Pineirua, O Doaré and S Michelin, Influence and optimization of the electrodes position in a piezoelectric energy harvesting flag, Journal of Sound and Vibration, 200--215, 2015. PDF

* Y Xia, S Michelin and O Doaré, Resonance-induced enhancement of the energy harvesting performance of piezoelectric flags, Applied Physics Letters, 263901, 2015. PDF

* S Michelin and O Doaré, Energy harvesting efficiency of piezoelectric flags in axial flows, Journal of Fluid Mechanics, 489--504, 2013. PDF

* O Doaré and S Michelin, Piezoelectric coupling in energy-harvesting fluttering flexible plates: linear stability analysis and conversion efficiency, Journal of Fluids and Structures, 1357--1375, 2011. PDF

Shape memory alloy torsional pendulum

Shape memory alloy are complex materials that are subject to solid-solid phase changes, which induce many different behaviours. In this project we propose to take profit of the loop that can occurs in these materials to dissipate energy and mitigate resonant oscillations. We carried out the first experimental demonstration of the hysteresis due to the softening effect of the dissipative loop.


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Teaching

In this course the coupled fluid and solid equations are derived. The dimensionnal analysis is presented. Main phenomena that occur when a structure is coupled to a fluid are then presented : added mass, stiffness, damping, bluckling and flutter instabilities, vortex induced vibrations, etc.

I initially created this course for my students at ENSTA-Paris : MS205

It is now proposed also at Ecole Polytechnique , and at Centrale Supélec.

Videos (in french) cover all the lectures. Please visit my page dedicated to this course : Cours d'interaction fluide-structure

The main objective of this introductory acoustics course is to provide the theoretical and practical elements necessary for the calculation of sound fields in fluid media and the processing of acoustic signals.

In addition to tutorials, a room acoustics project is proposed, consisting of carrying out measurements in the classroom, then using the data to study the influence of acoustic elements on reverberation times. We also create artificial reverberations from the data collected.

Download syllabus

The objective of this course is to provide the basics of experimental methods in mechanics. Several fields of mechanics are covered: fluid mechanics, solid mechanics, and vibrations.

The first part of the course is mainly made up of lectures that will deal with the physics and the use of the main sensors in each field, and with the notions of signal acquisition and processing.

In a second part, experimental projects are proposed in solid mechanics, fluid-mechanics and vibrations.

Download syllabus

Fluid-structure interactions in marine renewable energies
Lectures notes of the course I taught for the MsC REST/STEEM between 2013 and 2019:

lecture 1
lecture 2
lecture 3

Lecture slides on energy harvesting from oscillatory instabilities in fluid-structure interaction, at the FDSE summer school (July 2017, July 2019), at Tonnerres de Brest 2012 (July 2012):
Download slides

Lecture notes on the dissipation effect on aeroelastic instabilities and energy harvesting, at the CIM summer school (Udine, April 2017):
Download lecture notes
(published as a book chapter )



Software

Python module to perform data acquisition and analysis with Python, soundcards and NI DAQ devices.

Matlab function to perform data acquisition with Matlab, soundcards, NI DAQ device and Picoscopes.



Publications

Journal articles

1 -- N. Potrzebowska, O. Cavani, O. Oral, O. Doaré, G. Melilli, J.E. Wegrowe and M.C. Clochard, Mixing nanostructured Ni/piezoPVDF composite thin films with e-beam irradiation: A beneficial synergy to piezoelectric response, Materials Today Communications, 102528, 2021. PDF

2 -- E Garnell, B Aksoy, C Rouby, H Shea and O Doaré, Geometric optimization of dielectric elastomer electrodes for dynamic applications, Applied Acoustics, 108120, 2021.

3 -- E Garnell, O Doaré and C Rouby, Model-Based Adaptive Filtering of Dielectric Elastomer Loudspeakers, Journal of the Audio Engineering Society, 389--397, 2021.

4 -- E Garnell, C Rouby and O Doaré, Resistivity-induced coupling between voltage distribution and vibrations in dielectric elastomers, Smart Materials and Structures, 025031, 2021. PDF

5 -- E Garnell, O Doaré and C Rouby, Coupled vibro-acoustic modeling of a dielectric elastomer loudspeaker, The Journal of the Acoustical Society of America, 1812--1821, 2020.

6 -- E Garnell, C Rouby and O Doaré, Dynamics and sound radiation of a dielectric elastomer membrane, Journal of Sound and Vibration, 114836, 2019. PDF

7 -- C Issanchou, JL Le Carrou, C Touzé, B Fabre and O Doaré, String/frets contacts in the electric bass sound: Simulations and experiments, Applied Acoustics, 217--228, 2018.

8 -- G. Melilli, D. Gorse, A. Galifanova, O. Oral, E. Balanzat, O Doare, M Tabellout, M Bechelany, D Lairez, JE Wegrowe and MC Clochard, Enhanced Piezoelectric Response in Nanostructured Ni/PVDF Films, Journal of Material Science and Engineering, 1000444, 2018. PDF

9 -- C Issanchou, S Bilbao, JL Le Carrou, C Touzé and O Doaré, A modal-based approach to the nonlinear vibration of strings against a unilateral obstacle: Simulations and experiments in the pointwise case, Journal of Sound and Vibration, 229--251, 2017. PDF

10 -- A Malher, C Touzé, O Doaré, G Habib and G Kerschen, Flutter Control of a Two-Degrees-of-Freedom Airfoil Using a Nonlinear Tuned Vibration Absorber, Journal of Computational and Nonlinear Dynamics, 051016, 2017. PDF

11 -- Y Xia, O Doaré and S Michelin, Fluid-solid-electric energy transport along piezoelectric flags, European Journal of Computational Mechanics, 154--171, 2017. PDF

12 -- A Malher, O Doaré and C Touzé, Influence of a hysteretic damper on the flutter instability, Journal of Fluids and Structures, 356--369, 2017. PDF

13 -- Y Xia, O Doaré and S Michelin, Electro-hydrodynamic synchronization of piezoelectric flags, Journal of Fluids and Structures, 398--410, 2016. PDF

14 -- J Mougel, O Doaré and S Michelin, Synchronized flutter of two slender flags, Journal of Fluid Mechanics, 652--669, 2016. PDF

15 -- M Pneirua, S Michelin, D Vasic and O Doaré, Synchronized switch harvesting applied to piezoelectric flags, Smart Materials and Structures, 085004, 2016. PDF

16 -- Y Xia, S Michelin and O Doaré, Fluid-Solid-Electric Lock-In of Energy-Harvesting Piezoelectric Flags, Physical Review Applied, 014009, 2015. PDF

17 -- M Pineirua, O Doaré and S Michelin, Influence and optimization of the electrodes position in a piezoelectric energy harvesting flag, Journal of Sound and Vibration, 200--215, 2015. PDF

18 -- J De Ridder, O Doaré, J Degroote, K Van Tichelen, P Schuurmans and J Vierendeels, Simulating the fluid forces and fluid-elastic instabilities of a clamped{ extendash}clamped cylinder in turbulent axial flow, Journal of Fluids and Structures, 139--154, 2015. PDF

19 -- Y Xia, S Michelin and O Doaré, Resonance-induced enhancement of the energy harvesting performance of piezoelectric flags, Applied Physics Letters, 263901, 2015. PDF

20 -- J Boisson, C Rouby, J Lee and O Doaré, Dynamics of a chain of permanent magnets, {EPL} (Europhysics Letters), 34002, 2015. PDF

21 -- E de Langre and O Doaré, Edge flutter of long beams under follower loads, Journal of Mechanics of Materials and Structures, 283--297, 2015. PDF

22 -- L. Divaret, O. Cadot, P. Moussou and O. Doaré, Normal forces exerted upon a long cylinder oscillating in an axial flow, Journal of Fluid Mechanics, 649--669, 2014. PDF

23 -- L Divaret, P Moussou, J Berland, H Berro, O Cadot and O Doaré, Forces Exerted on a Cylinder in Near-Axial Flow, Journal of Pressure Vessel Technology, 051306, 2014. PDF

24 -- S Michelin and O Doaré, Energy harvesting efficiency of piezoelectric flags in axial flows, Journal of Fluid Mechanics, 489--504, 2013. PDF

25 -- O Doaré, G Kergourlay and C Sambuc, Design of a Circular Clamped Plate Excited by a Voice Coil and Piezoelectric Patches Used as a Loudspeaker, Journal of Vibration and Acoustics, 051025, 2013. PDF

26 -- M Ould Moussa, Z Moumni, O Doaré, C Touzé and W Zaki, Non-linear dynamic thermomechanical behaviour of shape memory alloys, Journal of Intelligent Material Systems and Structures, 1593--1611, 2012. PDF

27 -- O Doaré, A Sbarra, C Touzé, M Ould Moussa and Z Moumni, Experimental analysis of the quasi-static and dynamic torsional behaviour of shape memory alloys, International Journal of Solids and Structures, 32--42, 2012. PDF

28 -- O Doaré, D Mano and JC Bilbao Ludena, Effect of spanwise confinement on flag flutter: Experimental measurements, Physics of Fluids, 111704, 2011. PDF

29 -- P Sidlof, O Doaré, O Cadot and A Chaigne, Measurement of flow separation in a human vocal folds model, Experiments in Fluids, 123--136, 2011. PDF

30 -- O. Doaré, M. Sauzade and C. Eloy, Flutter of an elastic plate in a channel flow: Confinement and finite-size effects, Journal of Fluids and Structures, 76--88, 2011. PDF

31 -- O Doaré and S Michelin, Piezoelectric coupling in energy-harvesting fluttering flexible plates: linear stability analysis and conversion efficiency, Journal of Fluids and Structures, 1357--1375, 2011. PDF

32 -- L Divaret, P Moussou, O Cadot, J Berland and O Doaré, U-RANS simulation of fluid forces exerted upon an oscillating tube array in axial flow at large Keulegan-Carpenter numbers, ERCOFTAC Bulletin, 20--25, 2011. PDF

33 -- O Doaré, Dissipation effect on local and global stability of fluid-conveying pipes, Journal of Sound and Vibration, 72--83, 2010. PDF

34 -- P. Sidlof, E. Luneville, C. Chambeyron, O. Doare, A. Chaigne and J. Horacek, Finite Element Modeling of Airflow During Phonation, Applied and Computational Mechanics, 121-132, 2010. PDF

35 -- C. Eloy, O. Doaré, L. Duchemin and L. Schouveiler, A Unified Introduction to Fluid Mechanics of Flying and Swimming at High Reynolds Number, Experimental Mechanics, 1361--1366, 2009. PDF

36 -- E. de Langre, M. P. Païdoussis, O. Doaré and Y. Modarres-Sadeghi, Flutter of long flexible cylinders in axial flow, Journal of Fluid Mechanics, 371--389, 2007. PDF

37 -- O Doaré and E de Langre, The role of boundary conditions in the instability of one-dimensional systems, European Journal of Mechanics - B/Fluids, 948--959, 2006. PDF

38 -- F. Moisy, O. Doaré, T. Pasutto, O. Daube and M. Rabaud, Experimental and numerical study of the shear layer instability between two counter-rotating disks, Journal of Fluid Mechanics, 175--202, 2004. PDF

39 -- O. Doaré, B. Moulia and E. de Langre, Effect of Plant Interaction on Wind-Induced Crop Motion, Journal of Biomechanical Engineering, 146--151, 2004. PDF

40 -- O Doaré and E de Langre, The flow-induced instability of long hanging pipes, European Journal of Mechanics - A/Solids, 857--867, 2002. PDF

41 -- O. Doaré and E. de Langre, Local and global instability of fluid-conveying pipe on elastic foundations, Journal of Fluids and Structures, 1--14, 2002. PDF

42 -- E de Langre, O Doaré and F Pellet, Force suiveuse critique sur une colonne pesante semi-infinie : modèle et expériences, Comptes Rendus de l Académie des Sciences - Series {IIB} - Mechanics, 175--178, 2001. PDF

In proceedings

1 -- J.S. Schotté, R. Le Mestre and O. Doaré, Effect of coupling with internal and external fluids on the mechanical behavior of aerostats, Proceedings of SEMC, 2019. PDF

2 -- E. Garnell, O. Doaré and C. Rouby, Resonance modes for exterior vibro-acoustic problems, application to a dielectric elastomer loudspeaker, Proceedings of the International Conference of Acoustics, 2019. PDF

3 -- O. Doaré, E. Garnell and C. Rouby, Radiation optimization of piezoelectric plates, Proceedings of the International Conference of Acoustics, 2019. PDF

4 -- J. Adjiman, O. Doaré, P. Moussou and N. De Buretel de Chassey, Effects of confinment in the buckling of a flexible plate in axial flow: experimental and numerical study, Proceedings of the 11th International Conference on Flow-induced vibrations, 2016. PDF

5 -- J. Adjiman, P. Moussou, O. Doaré, H. Berro and O.Z Pascan, Divergence modes of a cluster of simply supported arrays in axial flow, Proceedings of the 11th International Conference on Flow-induced vibrations, 2016. PDF

6 -- A. Malher, C. Touzé, O. Doaré, G. Habib and G. Kerschen, Passive control of airfoil flutter using a nonlinear tuned vibration absorber, Proceedings of the 11th International Conference on Flow-induced vibrations, 2016. PDF

7 -- C. Issanchou, J.L. Le Carrou, S. Bilbao, C. Touzé and O. Doaré, A modal approach to the numerical simulation of a string vibrating against an obstacle: applications to sound synthesis, Proccedings of the 19th International Conference on Digital Audio Effects (DAFx-16), 2016. PDF

8 -- J. Adjiman, O. Doaré and P. Moussou, Buckling of a Flat Plate in a Confined Axial Flow, Proccedings of ASME 2015 Pressure Vessels and Piping Conference, 2016. PDF

9 -- J. De Ridder, J. J Degroote and O. Doaré, Fluid-elastic instabilities of clamped-clamped aligned and inclined cylinders in turbulent axial flow, Proccedings of ASME 2015 Pressure Vessels and Piping Conference, 2016. PDF

10 -- O. Doaré, Michelin S., Y. Xia and M. Pineirua, Flow energy harvesting with piezoelectric flags, Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering OMAE2014, 2014. PDF

11 -- L. Divaret, J. Berland, H. Berro, O. Cadot, O. Doaré and P. Moussou, Damping forces exerted upon a long cylinder oscillating in an axial flow, Proceedings of the 13th FSI, AE and FIV+N Symposium, 2013. PDF

12 -- O. Doaré and C. Eloy, The influence of channel walls on flag flutter, Flow-Induced Vibration (FIV2012), 2012. PDF

13 -- L. Divaret, O. Cadot, O. Doaré, P. Moussou and J. Berland, Normal forces exerted upon a long oscillating cylinder in an axial flow, Flow-Induced Vibration (FIV2012), 2012. PDF

14 -- S. Michelin and O. Doaré, Flow energy harvesting from piezoelectric flags, Flow-Induced Vibration (FIV2012), 2012. PDF

15 -- O. Doaré and S. Michelin, Piezoelectric energy harvesting from flag flutter instability, Proceedings of the European Non-linear Dynamics conference (ENOC-2011), 2011. PDF

16 -- A. Sbarra, O. Doaré, M. Ould Moussa, C. Touzé and Z. Moumni, Dynamical behaviour of a shape memory alloy torsional pendulum, Proceedings of the European Non-linear Dynamics conference (ENOC-2011), 2011. PDF

17 -- M. Ould Moussa, Z. Moumni, O. Doaré, C. Touzé and W. Zaki, Nonlinear oscillations and chaotic response of Shape Memory Alloys, Proceedings of the 4th Chaotic Modeling and Simulation International Conference, 2011. PDF

18 -- P. Šidlof, O. Doaré, O. Cadot, A. Chaigne and J. Horáček, Mathematical and physical model of flow-induced vibration of human vocal, Flow-Induced Vibration (FIV2008), 2008. PDF

19 -- O. Doaré, Effect of dissipation on local and global stability of fluid-conveying pipes, Flow-Induced Vibration (FIV2008), 2008. PDF

20 -- P. Sidlof, O. Doaré, A. Chaigne and J. Horacek, Piv measurements of velocity fields in glottison a physical vocal fold model, Proceedings of MAVEBA 2007, 2006. PDF

21 -- E. de Langre, M.P. Païdoussis, Y. Modarres-Sadeghi and O. Doaré, Flutter of long flexible cylinders in axial flow, Proceedings of the 6th FSI, AE and FIV+N Symposium, 2006. PDF

22 -- O. Doaré, T.M. Paes and M. Ferré, Feedback control of the flutter of a cantilevered plate in an axial flow, Proceedings of the 6th FSI, AE and FIV+N Symposium, 2006. PDF

23 -- C. Py, E. de Langre, P. Hémon, B. Moulia and O. Doaré, A new experimental technique for the measurement of the wind-induced motion of a crop canopy, Flow-induced Vibration (FIV-2004), 2004. PDF

24 -- O. Doaré and E. de Langre, Role of boundary conditions in the flow-induced instability of unidimensional systems, Flow-induced Vibration (FIV-2004), 2004. PDF

25 -- O. Doaré and E. de Langre, Role of boundary conditions in the flow-induced instability of unidimensional systems, Proceedings of the 5thFSI, AE and FIV+N Symposium, New Orleans, 2002. PDF

26 -- O. Doaré and E. de Langre, Local and global instability of fluid-conveying cantilever pipes, Flow-induced Vibration (FIV-2000), 2002. PDF

Theses (as director or co-supervisor)

1 -- P. Sidlof, Fluid-structure interaction in human vocal folds, Charles University grant, Prague, 2007.

2 -- M. Ould Moussa, Modélisation du Comportement Dynamique Non-Lineaire des Structures en Matériaux à Mémoire de Forme, Thèse de l'École Polytechnique, Unité de Mécanique de l'ENSTA Paris, 2011.

3 -- L. Divaret, Caractérisation des forces fluides s'exerçant sur un faisceau de cylindres oscillant latéralement en écoulement axial, Thèse de l'École Polytechnique, Unité de Mécanique de l'ENSTA Paris, 2011.

4 -- Y. Xia, Energy harvesting by piezoelectric flags, Thèse de l'École Polytechnique, Laboratoire d'Hydrodynamique / Unité de Mécanique de l'ENSTA Paris, 2015.

5 -- A. Malher, Amortisseurs passifs non linéaires pour le contrôle de l’instabilité de flottement, DGA Grant, Unité de Mécanique de l'ENSTA Paris, 2016.

6 -- J. Lee, Structures aimantées : dynamique, couplage inductif et récupération d'énergie, IDEX Paris Saclay Grant, Unité de Mécanique de l'ENSTA Paris, 2016.

7 -- J. Adjiman, Instabilités et comportement collectif de réseaux de plaques en écoulement axial, CIFRE EDF Grant, Unité de Mécanique de l'ENSTA Paris, 2016.

8 -- C. Issanchou, Vibrations de cordes en présence de non linéarités de type choc, Institut Jean-Le-Rond d'Alembert / Unité de Mécanique de l'ENSTA Paris, 2017.

9 -- E. Garnell, Dielectric elastomer loudspeakers : models, experiments and optimization, Institut Polytechnique de Paris / Unité de Mécanique de l'ENSTA Paris, 2020.