DRIVE ISAT

Coulanges-lès-Nevers, France

DRIVE ISAT

Coulanges-lès-Nevers, France

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Sophy T.,DRIVE ISAT | Silva A.D.,DRIVE ISAT | Kribeche A.,DRIVE ISAT
Numerical Heat Transfer, Part B: Fundamentals | Year: 2012

A space-time diffuse approximation method avoiding any secondary finite-difference time-stepping procedure, is presented to solve partial differential equations (PDEs) containing high discontinuities. This method is validated with a non-inner source heat equation. It is shown that its accuracy is improved when using a new proposed weight function. Furthermore, the application of the new weight function, respecting the principle of causality, removes some spurious oscillations appearing with high temporally discontinuous heat sources (such as Heaviside). Results, presented as isotherms or temperature fields, get closer to those obtained with an implicit first-order backward finite-difference scheme. © 2012 Copyright Taylor and Francis Group, LLC.


Hafidi A.E.,DRIVE ISAT | Pegna C.D.L.,DRIVE ISAT | Martin B.,DRIVE ISAT
Vibroengineering Procedia | Year: 2015

An efficient method to reduce the frequency averaged transverse vibration level of a plate by optimizing the position of attached passive constrained layer damping PCLD is presented. This method uses a multilayer anisotropic plate model which is an equivalent single layer plate model (ESL) where transverse shear stresses and displacements are continuous at each layer's interfaces. Hence, for a laminate composed of an arbitrary number of layers, all the quantities are related to those of the first layer. The optimization process is based on the use of the ESL plate model combined with the genetic algorithm (GA) and Latin Hypercube Sampling (LHS) algorithm implemented in a Rayleigh-Ritz resolution program. The convergence acceleration of the method is achieved thanks to the combination of genetic algorithm and the use of the ESL plate model instead of a three-dimensional mesh that requires more computing resource. © JVE International Ltd.


El Hafidi A.,DRIVE ISAT | Herrero C.D.L.P.,DRIVE ISAT | Martin B.,DRIVE ISAT
Journal of Vibroengineering | Year: 2015

An efficient method to reduce the frequency averaged transverse vibration level of a plate by optimizing the position of attached passive constrained layer damping PCLD is presented. This method uses a multilayer anisotropic plate model which is an equivalent single layer plate model (ESL) where transverse shear stresses and displacements are continuous at each layer’s interfaces. Hence, for a laminate composed of an arbitrary number of layers, all the quantities are related to those of the first layer. The optimization process is based on the use of the ESL plate model combined with the genetic algorithm (GA) and Latin Hypercube Sampling (LHS) algorithm implemented in a Rayleigh-Ritz resolution program. The convergence acceleration of the method is achieved thanks to the combination of genetic algorithm and the use of the ESL plate model instead of a three-dimensional mesh that requires more computing resource. © 2015, JVE INTERNATIONAL LTD.

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