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as well (Prof. Duysinx).
􀂄 Man Power: researchers (5) + staff (2)
􀂄 Research programs for ~500.000 € every
year
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U N I V E R S I T Y o f L i è g e
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
SIMULATION AND OPTIMIZATION
U N I V E R S I T Y o f L i è g e
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
SIMULATION AND OPTIMIZATION
􀂄 Researches realized in the tradition of LTAS
􀂄 Tradition of scientific quality
􀂄 Tradition of collaborating with industry partners
􀂄 Development in SAMCEF environment
􀂄 SAMCEF MECANO for flexible multibody systems
􀂄 OOFELIE: Object Oriented Finite Element Led by
Interactive Execution: simulation of strongly coupled
multiphysic problems
􀂄 Boss Quattro: open environment for optimization of
structural, multidisciplinary and multiphysic
problems
􀂄 Many results are transferred to the SAMCEF codes
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
SIMULATION AND OPTIMIZATION
􀂄 Major topics are:
􀂄 Simulation of vehicle dynamics / engine dynamics
􀂄 Engine dynamics in extreme and rapid motions
(motor sport for instance)
􀂄 Vehicle as a mechatronics system: semi-active
suspensions, vehicle dynamics control…
􀂄 Optimization of structures
􀂄 Shape
􀂄 Topology
􀂄 Generalized shape (Extended Finite Element
Methods)
􀂄 Multiphysic simulation and optimization of MEMS
(micro electromechanical systems)
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
ENGINE SIMULATION
􀂄 Flexible multibody simulation
of engines in extreme
conditions (e.g. motorsport)
􀂄 Verification of engine
elements
􀂄 Flexibility, buckling,
fatigue of connecting rods
􀂄 Vibrations and fatigue of
cranckshafts
􀂄 Collaboration with SAMTECH,
GDTech and Excilis
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
VEHICULE MECHATRONICS
􀂄 Integrated simulation of flexible
multibody systems and their
control systems
􀂄 Unified formulation of controlled
multibody dynamics using F.E.
and block diagram formalism
􀂄 Reduced-order strategy of
multibody systems for control
strategy synthesis
􀂄 Example: simulation of the
dynamics of a semi-active shock
absorber
􀂄 Technology transferred to
OOFELIE package
0 1 2 3 4 5 6
−6
−4
−2
0
2
4
6
8
x 106
time (s)
dP/dt (Pa/s)
Rebond chamber
Compression chamber
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
TOPOLOGY OPTIMIZATION
􀂄 Topology optimization is
formulated as an optimal
material distribution (Bendsoe &
Kikuchi, 1988)
􀂄 Numerous contributions to the
problem:
􀂄 Stress constraints
􀂄 Optimization algorithms able
to solve very large scale
problems
􀂄 Perimeter constraints
􀂄 Discrete 0/1 variables
􀂄 ...
􀂄 Applications to industrial
problems e.g. Airbus Industries
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INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
TOPOLOGY OPTIMIZATION
􀂄 Topology optimization of the number/position of welding
spots
Topology optimisation
with 0/1 variables
(Beckers & Fleury, 1998)
Minimise number of
welding spots
s.t. displacements
constraints
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AUTOMOTIVE Engineering
INTRODUCTION SIMULATION & OPTIMIZATION CLEAN PROPULSION TECHNO CONCLUSION
GENERALIZED SHAPE OPTIMIZATION WITH XFEM
􀂄 Novel Finite Element method to capture variable
boundary problems like fracture propagations,
　
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