Diffraction par des surfaces rigides de révolution d'un champ acoustique harmonique en hautes fréquences

The aim of this paper is the calculation, at high frequencies, of the diffracted pressure of an acoustic wave by axisymmetrical rigid surfaces. Using an integral formulation, we present herein a mixed approach based on the asymptotic expansion theory, in order to reduce the space of the integration domain, and on the collocation method, used to improve the numerical computation. This numerical software leads to an interesting saving of computation time. This approach is developed in the study of an analytical case.