First Name : Hassen
Last Name : TRABELSI
Occupation : Teacher-researcher
Specialty : Mechanics
Affiliation : Mechanics, Modelling and Manufacturing Research Laboratory
(LA2MP) of National School of Engineering of Sfax – University of Sfax
Engineering Laboratory of Mechanical Systems and Materials (LISMMA)
of Higher Institute of Mechanics of Paris
Phone : 22 783 388
e-mail : [email protected]
Postal Adress :
ALJT St-Ouen-JAM
Appartement 7 Bâtiment 3
41, rue Albert Dhalenne
93400 Saint-Ouen
Professional Experience :
These teaching activities took place at the National School of Engineering of Sfax and the Higher Institute of
Mechanics of Paris.
1. Teaching at the National of Engineering School of Sfax
Academic Year 2010/2011 (contractual teaching Assistant of higher education)
Level : 1st year electromechanical engineering

144 hours of practical work of machining method conventional milling.
Level : 3rd year electromechanical engineering

108 hours of practical work of machining programming on machine tools with numerical control.
Academic Year 2011/2012 (contractual Assistant of higher education)
Level : 1st year electromechanical engineering

135 hours of practical work of machining method conventional milling.

48 hours of practical work-based CAD on CATIA V5.
Level : 3rd year electromechanical engineering

60 hours of practical work of machining simulation on Mastercam V9.
2. Teaching at the Higher Institute of Mechanics of Paris
Academic Year 2012/2013 (Temporary teaching and research Assistant)
Level : 1st year Mechanical Engineering

64 hours of practical work Algorithms and Programming (in C language).
Level : 2nd year Mechanical Engineering


12 hours of practical work of optimization on MATLAB V2012.
4 hours of practical work of optimization on CATIA V6.
Level : 3rd year Mechanical Engineering

Co-supervision of a synthesis project (3 students: section Simulation and Mechanical Design) entitled
"Modelling and design of an active suspension".
Academic Year 2013/2014 (Temporary teacher)
Level : 1st year Mechanical Engineering

12 hours of practical work Algorithms and Programming (in C language).
Level : 2nd year Mechanical Engineering


12 hours of practical work of optimization on MATLAB V2012.
4 hours of practical work of optimization on CATIA V6.
Research Activities :
1. Master in Mechanical and Engineering
My master was carried on through cooperation between Mechanics, Modelling and Manufacturing Research
Laboratory (LA2MP) of the National School of Engineering of Sfax, Tunisia and Roberval Laboratory of
mechanical (UMR7337) at the University of Technology of Compiegne, France.
Research topic: "Diagnostic defects of an axial fan by identifying its acoustic radiation."
My master study focused on the development of an experimental technique for monitoring and diagnosis of
axial fans based on an acoustic monitoring in situations where it is necessary to operate at a distance because
of the inaccessibility of areas of event defects. This research is part of a CNRS project.
After obtaining my master degree, I started my PhD in September 2010.
2. Doctoral thesis in Mechanics
This thesis was carried on through co-supervision between the Engineering Laboratory of Mechanical Systems
and Materials (LISMMA) at the Higher Institute of Mechanics of Paris-France and the Mechanics, Modelling
and Manufacturing Research Laboratory (LA2MP) at the National School of Engineers of Sfax. It was cosupervised by Mr. Mohamed HADDAR, University Professor Mr. Jamel Louati, University Professor and Mr.
Pierre-Alain YVARS, Associate Professor HDR.
Research topic: "Contribution to the consideration of dynamic requirements in the preliminary design of
complex systems."
The subject of this thesis concerns the optimization of the design approach and more precisely the pre-sizing
step.
In a collaborative engineering environment, conventional design methodologies based on a loop «design simulation - return to the initial step in case of failure ", is becoming increasingly obsolete. The idea of the
research is to provide meta-models and computer tools adapted to the integration of simulation step at the
earliest stage of preliminary design. The project manager and engineer can then have the earliest tools aid
simplified decision incorporating knowledge and simulation to avoid waiting for the actual simulation step to
determine the dynamic validity of architectural choices and presizing made .
Our contribution concerns the optimization of the design process of complex technical systems by taking into
account the dynamic requirements in the preliminary design phase. Indeed, we provide a design approach
based on intervals software tools adapted to the integration of dynamic requirements earlier in the preliminary
design phase of complex technical systems which avoids resizing loops in case of failure.
At first, the intervals method calculation is used as a guarantee method for resolution of ordinary differential
equations and to dynamically simulate the linear and non-linear linearizable complex technical systems to
minimize the number of simulations. The idea is to apply this method to get a frame of the solution domain in
the form of a Cartesian product of intervals and / or sets instead of a single assessment. Variables expressed by
intervals represent areas of possible values of the design parameters of the system design. Thus, the
parameterized model of the system is determined by intervals. This avoids running n simulations with n values
for each design parameter.
In a second step, we propose a design approach in which, the dynamic requirements are taken into account at
the earliest stage of preliminary design systems. A first objective is to pre-size a product in statically and
dynamically manner at the same phase such that the values of design parameters generated by this method
satisfy the set of static and dynamic system requirements simultaneously. A second objective is to minimize
the number of resizing loops type "Design, simulation, return to the initial step in case of failure. »
The proposed method was evaluated by several tests on a scalable numerical example. It was applied to the
design of an active suspension system Macpherson. The dynamic model of the MacPherson suspension is
nonlinear, but linearizable.
Journal Papers :
3. Majdi Abid, Hassen Trabelsi, Mohamed Taktak, Jérôme Antoni, Jean Michel Ville, Tahar Fakhfakh,
Mohamed Haddar, « Tonal prediction of a faulty axial fan », Applied Acoustics (ELSEVIER), Volume
73, Issue 10, 2012,pp. 1022–1028.
4. Hassen Trabelsi, Pierre-Alain Yvars, Jamel Louati, Mohamed Haddar, « CSP Approach and Interval
Computation for the coupling between static and dynamic requirements in the preliminary design of a
compression spring», European Journal of Computational Mechanics. Volume 22, Issue 2-4, 2013 pp
183-197
5. Hassen Trabelsi, Pierre-Alain Yvars, Jamel Louati, Mohamed Haddar, « Evaluation of the effectiveness
of the interval computation method to simulate the dynamic behavior of subdefinite system.
Application on an active suspension system », International Journal on Interactive Design and
Manufacturing
(Springer).
Print
ISSN
1955-2513,
Online
ISSN
1955-2505:
http://link.springer.com/article/10.1007%2Fs12008-014-0210-y
Conference Papers :
1. Hassen Trabelsi, Majdi Abid, Mohamed Taktak, Jérôme Antoni, Jean Michel Ville, Tahar Fakhfakh,
Mohamed Haddar, « Diagnostic des défauts d’un ventilateur axial par identification de son rayonnement
acoustique », 4ème Congrès International (CMSM) : Conception et Modélisation des Systèmes
Mécaniques, 30 Mai - 1 Juin 2011, Sousse, Tunisie.
2. Hassen Trabelsi, Pierre-Alain Yvars, Jamel Louati, Mohamed Haddar, « Effectiveness of an interval
computation approach to the dynamic simulation of a MacPherson Suspension System». Mechatronics
2012, 9th France-Japan & 7th Europe-Asia Congress on and Research and Education in Mechatronics
(REM), 2012 13th Int'l Workshop on, 21-23 November 2012, Paris, France.
3. Hassen Trabelsi, Pierre-Alain Yvars, Jamel Louati, Mohamed Haddar, « Application of the CSP approach
and the interval computation for the optimal sizing of a compression spring ». 5ème Congrès
International (CMSM) : Conception et Modélisation des Systèmes Mécaniques, 25-27 Mars 2013,
Djerba, Tunisie.