Rougerie, Tiphaine (2016) Factorisation of Wiener-Hopf Matrices PRE - Research Project, ENSTA.

Restricted to Registered users only



The Wiener-Hopf technique is an elegant method to solve some partial differential equations. We applied it to the diffraction of an acoustic plane wave on an infinite grating. This project is based on the new asymptotic factorisation proposed by Mishuris and Rogosin (2014 [3]). We first compute a rational approximation of the general functions studied, which in our case of application are hyperbolic, using the Matlab library Chebfun. Thus, the problem becomes algebraic rather than analytic, and the factorisations are implemented in Matlab for these rational matrix functions. We then investigate the accuracy of this approach and its convergence, in order to precise which kind of functions will give satisfying results.

Item Type:Thesis (PRE - Research Project)
Uncontrolled Keywords:Wiener-Hopf technique, Matrix factorisation, Rational approximation, Wave problem.
Subjects:Mathematics and Applications
ID Code:6801
Deposited By:Tiphaine Rougerie
Deposited On:28 sept. 2016 11:19
Dernière modification:28 sept. 2016 11:19

Repository Staff Only: item control page