A MULTI-DOMAIN BOUNDARY ELEMENT METHOD FOR MODELLING ACOUSTIC RADIATION AND SCATTERING PROBLEMS

摘要

The formulation of an alternative multi-domain direct collocation boundary element method is presented. The formulation is very flexible due to the fact that the degree of subdomaining can be chosen depending on whether or not computational efficiency or accuracy in the application of the Sommerfeld radiation condition is important A great advantage is that no non-uniqueness problems are observed. The fact that infinite faces can be modelled with a single variable order infinite boundary element, opens up the possibility for modelling different types of half plane conditions (e.g. infinite impedance planes).