Wave damping and evanescence: how to combine the spatial and temporal visions of the same problem? 1
TypeCommunications avec actes
It is proposed to analyze the forced response of periodic structures using a 2D Fourier transform using continuous time and discrete space. The simple example of compression waves is used to show that this response can be used to define poles in the wavenumber domain corresponding to evanescent waves or poles in the frequency domain corresponding to damped periodic modes. Link with classical computational methods based on FEM models of cells was done for both the periodic solution and wave based approach (SAFE, WFE). Two examples are analyzed in more detail: a simple train track model exhibiting a band-gap and the more complex case of a honeycomb panel where cell wall bending occurs within the band of interest.
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ARLAUD, Elodie; COSTA D'AGUIAR, Sofia; BALMES, Etienne (IFFSTAR, 2014)Nowadays, trends in railways are for more traffic at higher speed, whereas infrastructures remain basically unchanged. As track design has evolved over the years based on experience, the introduction of numerical models ...
Validation of a reduced model of railway track allowing long 3D dynamic calculation of train-track interaction ARLAUD, Elodie; COSTA D'AGUIAR, Sofia; BALMES, Etienne (2014)In order to face challenges of increased traffic and speed on their infrastructures, railway companies need to develop numerical tools able to predict the dynamic behaviour of the track. Currently, two approaches are widely ...
ARLAUD, Elodie; COSTA D'AGUIAR, Sofia; BALMES, Etienne; FAUSSURIER, Guillaume (Civil-Comp Press, 2016)The main objective of this paper is to present an innovative numerical tool to represent the track and platform dynamic behavior under passing trains. Dynavoie is currently being developed for engineering purposes at SNCF. ...
ARLAUD, Elodie; COSTA D'AGUIAR, Sofia; BALMES, Etienne (Elsevier, 2016)This paper presents numerical simulations and experimental studies on the frequency domain behavior of railway track below 100 Hz, focusing on the link between the substructure properties of the track and its global dynamic ...
PINAULT, Hadrien; ARLAUD, Elodie; BALMES, Etienne (ELSEVIER, 2020)Structures composed of repetitions of multiple identical cells are common and have been the object of a large body of literature on waveguides, periodic media, and cyclic symmetry. Starting from a cell model, possibly with ...