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Stages, Emplois, Thèses > Offre d’emploi > Postdoctoral Research : Simplified and robust large frequency range models adapted to inverse methods

Postdoctoral Research : Simplified and robust large frequency range models adapted to inverse methods

par Laurence Gallitre - 28 août 2012

Postdoctoral Research Position
at the Laboratory of Tribology and Systems Dynamic (LTDS, UMR
CNRS 5513)
Ecole Centrale de Lyon, Lyon, France
Robust multi-objective optimization tool
Scientific context
Within the framework of complex structures design with dynamics objectives,
large and medium frequency bands calculation costs lead to an ever increasing
lead time.
In order to reach a reasonable design lead time, inverse problem approaches
have been developed. Among these approaches, methods based on hybrid
formulations are promising as they can take into account both large and
medium frequency bands [1].
From a design point of view, hybrid approaches can be considered as a
optimization problems under uncertainties.
Hence, robust optimization strategies can be used to generate quickly a robust
design. Classical approaches such as the Reliability Based Design Optimization
[2, 3] approach, or the Robust Design Optimization approach, provide accurate
results within reasonable time if models used are simple. These methods are at
their very beginning when mixed with inverse problems formulations.
References :
[1] Besset, S. and Jézéquel, L., 2008, « Modal Criteria for Optimization of the
Acoustical Behaviour of a Vibroacoustic System based on a Systemic Approach »,
International Journal for Numerical Methods in Engineering, 73, pp. 1347-1373.
[2] Coello CA (2002) Theoretical and numerical constraint-handling techniques used
with evolutionary algorithms : A survey of the state of the art. CMAME 191(11)
pp1245–1287
[3] Schueller, GI &Al (2008) Computational methods in optimization considering
uncertainties – An overview. CMAME, 198(1) pp2-13
Objectives
This post-doctoral position is funded by the French National Research Agency
(ANR), within the project MoSiRoLaMI : "Simplified and robust large frequency
range models adapted to inverse methods”. The post-doctoral applicant will
actively participate to one (or more) topics linked to the project.
The skills required by the project are very vast and several postdoctorants will
be recruited. Depending on the candidat profile, his (her) contribution will be
mainly oriented to :
• the development of medium-high frequency methods
• inverse problems
• robust design optimization approaches.
Research position
Duration : 18 months (starting as soon as possible)
Location : The applicant will join the team “Durability, Fretting and
Dynamics” in the Laboratory LTDS, in Ecole Centrale de Lyon, Lyon,
France.
Net salary : about 2000 euros per month
This post-doctoral position is funded by the
French National Research Agency (ANR)
, within
the project MoSiRoLaMI : "Simplified and robust
large frequency range models adapted to
inverse methods”. The post-doctoral applicant
will actively participate to this project.
Financé par
Qualifications
We seek for candidates with a good background in one of the following fields :
mechanical design, vibro-acoustic, numerical implementation, optimization
methods.

 

Application
Applicants shoud send their curriculum vitae and statement of interests to
Dr. Sébastien BESSET or Dr Frédéric GILLOT
sebastien.besset@ec-lyon.fr or frederic.gillot@ec-lyon.fr
Ecole Centrale de lyon, LTDS (D2S)
36 avenue Guy de Collongue - 69134 Ecully Cedex


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