Author(s)

J.P. Coyette

Abstract

A generalized extended boundary element model is proposed for handling complex acoustic problems in the frequency domain. The model relies on a mixed direct/indirect boundary integral representation allowing to handle closed structures with thin appendages. The formulation uses pressure, jump- of-pressure, mean pressure and/or velocity variables along the boundary surface. A special attention is devoted to the treatment of both continuous and discontinuous boundary conditions. In contrast with earlier implementations of this mixed integral representation, the present solution procedure relies on variational solution scheme. By this way, the symmetry of the discrete problem is preserved. This property makes easier the required coupling with a finite element structural model in order to solve complex fl

Keywords