In this paper we propose an original approach for the simulation of the time-dependent response of a floating elastic plate using the so-called Singularity Expansion Method. This method consists in computing an asymptotic behaviour for large time obtained by means of the Laplace transform by using the analytic continuation of the resolvent of the problem. This leads to represent the solution as the sum of a discrete superposition of exponentially damped oscillating motions associated to the poles of the analytic continuation called resonances of the system, and a low frequency component associated to a branch point at frequency zero. We present the mathematical analysis of this method for the two-dimensional sea-keeping problem of a thin elastic plate (ice floe, floating runway, ...) and provide some numerical results to illustrate and discuss its efficiency.
Mots clés : Laplace transform, resonance, meromorphic family of operators, integral representation
@article{M2AN_2007__41_5_925_0,
author = {Hazard, Christophe and Loret, Fran\c{c}ois},
title = {The singularity expansion method applied to the transient motions of a floating elastic plate},
journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique},
pages = {925--943},
publisher = {EDP-Sciences},
volume = {41},
number = {5},
year = {2007},
doi = {10.1051/m2an:2007040},
mrnumber = {2363889},
zbl = {1140.74029},
language = {en},
url = {http://www.numdam.org/articles/10.1051/m2an:2007040/}
}
TY - JOUR AU - Hazard, Christophe AU - Loret, François TI - The singularity expansion method applied to the transient motions of a floating elastic plate JO - ESAIM: Modélisation mathématique et analyse numérique PY - 2007 SP - 925 EP - 943 VL - 41 IS - 5 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an:2007040/ DO - 10.1051/m2an:2007040 LA - en ID - M2AN_2007__41_5_925_0 ER -
%0 Journal Article %A Hazard, Christophe %A Loret, François %T The singularity expansion method applied to the transient motions of a floating elastic plate %J ESAIM: Modélisation mathématique et analyse numérique %D 2007 %P 925-943 %V 41 %N 5 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an:2007040/ %R 10.1051/m2an:2007040 %G en %F M2AN_2007__41_5_925_0
Hazard, Christophe; Loret, François. The singularity expansion method applied to the transient motions of a floating elastic plate. ESAIM: Modélisation mathématique et analyse numérique, Tome 41 (2007) no. 5, pp. 925-943. doi : 10.1051/m2an:2007040. http://www.numdam.org/articles/10.1051/m2an:2007040/
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