Curriculum Vitae - Pimm

Emmanuelle SARROUY
11, rue des Vignes,
92190 MEUDON, FRANCE
Phone: +33 6 81 39 35 69
E-Mail: [email protected]
06/08/1981 (28 years old)
Nationality : French
EDUCATION
2008 PhD Thesis in Mechanical Engineering
Ecole Centrale de Lyon, Laboratory of Tribology and Systems Dynamics, France
2005 Master of Science in Mechanical Engineering
Ecole Centrale de Lyon and University of Lyon I - Claude Bernard, France
2005 Master’s degree in General Engineering
Ecole Centrale de Lyon (one of the top ten French engineering universities)
2002 Passed the highly selective national entrance examination to engineering universities after two
years of study in preparatory classes with courses focused on mathematics and physics.
Lycée Corneille, Rouen, France
RESEARCH EXPERIENCE
Sept. 2008 … Arts et Métiers ParisTech – CER de Paris, Paris, France
… Today PIMM (Process and Engineering in Mechanics and Materials, former LMSP Processes and Systems
Mechanics Laboratory)
Study of chatter instability in turning
Most methods deal with simple turning models to establish stability lobes: orthogonal cutting
assumption, use of only a few degrees of freedom, linearization of cutting law around the
nominal cutting condition. The drawbacks are a poor stability limits prediction and no knowledge
of periodic cycles occurring due to nonlinear effects stabilization.
Our work aims at going beyond these simplifications using a modal description of the system and
frequential approaches combined with global analysis tools.
Nov. 2005…
Ecole Centrale de Lyon, Lyon, France – Snecma Motors (Safran Group)
… Sept. 2008 LTDS (Laboratory of Tribology and Systems Dynamics)
Global analysis of nonlinear mechanical systems – Application to rotor dynamics
The aim of this PhD thesis was to propose and test a method able to find all the solutions of a
nonlinear dynamical system, especially systems in the field of rotor dynamics. Several existing
methods were compared (cell-mapping, exclusion test based methods, interval analysis). A
common problem was that they required too much computation time. A combination of
harmonic balance method plus a polynomial approximation that let the resulting system be
solved “globally” using a homotopic approach was then proposed and successfully applied to
several examples. It has been shown to be the most cost effective method. At the moment, it has
only been developed to find constant and periodic solutions.
April 2005 …
Ecole Centrale de Lyon, Lyon, France – Snecma Motors (Safran Group)
… Sept. 2005 LTDS (Laboratory of Tribology and Systems Dynamic)
Study of instabilities occurring beyond the first rotor flexion mode
Stress was put on instabilities due to damping in rotating parts. An easy to use stability criterion
was established. Other instabilities occurring when axisymmetry is broken were also considered.
E. Sarrouy - Curriculum Vitae
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RESARCH INTERESTS
I was introduced to structural dynamics and dimensioning problems through my Master’s degree. My final year
project “Global analysis of nonlinear mechanical systems – Application to rotor dynamics” gave me the
opportunity to learn about rotating machineries modelling and study in the linear case and to practice stability
methods.
My PhD thesis work then let me handle nonlinear systems – rotating or not – and the main tools helpful to their
study: classical time integration schemes, shooting method to exhibit periodic solutions, the harmonic balance
method (frequential approach), stability and bifurcation detection (Floquet theory, continuation algorithms, etc.).
I then was able to work at developing a global analysis method which aimed at finding all the solutions of a
nonlinear system (in a reasonable amount of time). I tested several methods like cell-mapping, cell-exclusion
algorithms, interval analysis based methods and homotopy methods for polynomial systems. Taking advantage on
this last one, I proposed a method able to find every constant or periodic solution of a nonlinear dynamical
system faster than with the three previous methods.
Currently in the Process and Engineering in Mechanics and Materials, I work with Prof. P. Lorong in order to
apply this method to chatter instability during turning, which is, on a system modelled by delayed differential
equations.
Keywords: structural dynamics, nonlinear, global analysis, stability, bifurcation
PUBLICATIONS
> A. Grolet, E. Sarrouy and F. Thouverez, Global and bifurcation analysis of a structure with cyclic symmetry,
International Journal of Non-Linear Mechanics, Under review
> E. Sarrouy and F. Thouverez, Global search of non-linear systems periodic solutions: A rotordynamics
application, Mechanical Systems and Signal Processing, 24(6), 1799-1813, 2010.
> E. Sarrouy and F. Thouverez, Analyse globale de systèmes dynamiques non-linéaires : une méthode
homotopique (Nonlinear dynamical systems global analysis : a homotopic method), Actes du 9ème Colloque
national en calcul des structures, Giens, France, 25-29 juin 2009.
> E. Sarrouy and F. Thouverez, Periodic solution analysis of a rotor-stator contact nonlinear problem, Proceedings
of ASME International Mechanical Engineering Congress and Exposition, Chicago, IL, USA, November 5-10, 2006.
> E. Sarrouy and F. Thouverez, Periodic solution analysis of a rotor-stator contact nonlinear problem, Proceedings
of XI International Congress of Propulsion Engineering, Rybachye, Crimea, Ukraine, September 13-18, 2006.
TEACHING EXPERIENCE
2008…
Temporary Assistant Professor at Arts et Métiers ParisTech – CER de Paris, Paris,
… Today France
2006
(French engineering university)
> Tutorials in mechanical vibrations
> Tutorials and laboratory classes in numerical methods
> Final year projects direction
Teaching Assistant at Ecole Centrale de Lyon, Lyon, France
> Foreign students support in mathematics
E. Sarrouy - Curriculum Vitae
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OTHERS
ADMINISTRATIVE AND COLLECTIVE RESPONSIBILITIES
2009…
2008…
2007…
2006…
2005…
Webmaster of the PIMM laboratory web site (rebuilt and maintained,
…2010 http://pimm.paris.ensam.fr)
…2009
Responsible for LMSP internal seminars organization
Member of organization committee of LTDS PhD students colloquium (2 half-days with about 20
…2008 presentations each)
…2008
…2008
Elected PhD students representative for Mechanical department of Ecole Centrale de Lyon
Webmaster of the research team web site (rebuilt and maintained, http://d2s.ec-lyon.fr )
COMPUTER SKILLS
Systems Unix/Linux, Windows
Software Word, Excel, Powerpoint, Tex-Latex
Nastran, Ansys, Abaqus
Catia
Programming C/C++, Matlab, Mathematica
languages HTML, PHP, Javascript
LANGUAGES
English Fluent
Deutsch Read
French Mother tongue
REFERENCES
Prof. Fabrice Thouverez
LTDS,
Ecole Centrale de Lyon
36 avenue Guy de Collongue
69134 ECULLY Cedex
France
Phone: +33 4 72 18 64 71
E-mail: [email protected]
E. Sarrouy - Curriculum Vitae
Prof. Philippe Lorong,
PIMM,
Arts et Métiers ParisTech, CER de Paris
151 boulevard de l’Hôpital
750013 Paris
France
Phone: +33 1 44 24 62 85
E-mail: [email protected]
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