Acoustic scattering from a 2-D fluid waveguide with an irregular floor viathe BEM

This work focuses on the way the pressure field generated by a dilatational load changes inside a channel waveguide filled with a homogeneous fluid, i n the presence of an irregular floor. The problem is solved in the frequenc y domain using the boundary element method. The Green's functions used are obtained by superposing virtual acoustic sources defined so as to generate the free or rigid surfaces of the fluid channel. The responses in the time domain are obtained by means of Fourier transforms, using complex frequenci es, irregular floors of varying sizes are modeled. The main features and sp ectral representation of the signals scattered by these inclusions are desc ribed. They are used to elucidate the most important aspect of wave acousti cs, which can be used as the basis for the development of nondestructive te sting and imaging methods.