Author(s)

A. Tadeu, D. Mateus & A. Pereira

Abstract

The Boundary Element Method (BEM) is used to compute the three-dimensional pressure field generated by a point pressure source in the vicinity of an infinite rigid pipeline, submerged in a flat waveguide channel filled with a homogeneous fluid. The problem is solved in the frequency domain, using boundary elements to model the pipeline and an appropriate Green's function to simulate the free surface and the rigid floor of the channel. Because of the 2-1/2-D geometry of the problem, the separation of variables has been used, and the solution at each frequency is expressed in terms of waves with the varying wavenumber, fc,. Time responses at different points in the space domain are computed by applying an inverse (Fast) Fourier Transform, using a Ricker pulse as the dynamic excitation sour

Keywords