french institute of science and technology for transport ... - Ifsttar

2_SCIENTIFIC AND TECHNICAL ACTIVITIES
Deformed Var: U Deformation scale factor: +3.673e+03
S, Mises
the case of sandwich panels,
we have demonstrated the validity
of sandwich theory and
provided effective tools for computing
stiffness.
Our findings will permit much more robust mo
elling of plates for structural members such as waffle slabs,
orthotropic slabs and lattice structures.
@ CONTACT
arthur.lebee@enpc.fr
Simulation of the bending of a
sandwich panel with a folding core.
The skins deform out-of-plane.
A community software platform
All together with I-Simpa
52
The I-Simpa
interface (Acoustic
simulation of a
theatre).
A community software platform that hosts numerical
codes for computing acoustic propagation in 3D
environments.
As part of its research into environmental acoustics,
the EASE unit (part of the IM unit) has developed computing
code for modelling the propagation of noise in 3D environments.
However, some operations are often extremely tedious, for example
managing input data (geometric scene, assigning the
acoustic properties of the materials, positioning and characterizing
the acoustic sources …) and processing the numerical
data in order to obtain benchmark acoustic indicators.
The I-Simpa graphic interface has been specifically developed
to facilitate pre- and post-processing. Ultimately, it will be able
to host any in-house computing code.
As this platform is also intended to meet the needs of researchers
in other laboratories, a Python script plug-in and a set of
software libraries have been added to I-Simpa to enable users
to input their own computing code and develop their own
functionalities.
This is currently available for download free of charge from the
i-Simpa website (i-simpa.ifsttar.fr). The aim is to create and
foster a community of users (forums, script swapping, showcase…).
In addition, training and discussion workshops will be
organized in the future.
@ CONTACT
judicael.picaut@ifsttar.fr
Colibri
A new device for dynamic
pavement testing
Dynamic pavement testing techniques can now take
advantage of a new prototype, Colibri.
This device, which was developed by the network of Laboratoires
des Ponts et Chaussées, is an example of the transfer
of knowledge to the operational sphere, providing the highways
engineering community with a robust freestanding device for
analyzing short lengths of pavement.
The device imparts a medium frequency impact to the pavement
and measures the response using three accelerometers.
The signals are analyzed in order to generate a map of the
pavement structure that includes an indicator that shows the
ifsttar French Institute of Science and Technology for Transport, Development and Networks