@Article{cmes.2000.001.531,
AUTHOR = {Paulo Santos, Julieta António, António Tadeu},
TITLE = {Wave Scattering by 2D Smooth Topographical Elastic Deformations Caused by a Point Blast Source},
JOURNAL = {Computer Modeling in Engineering \& Sciences},
VOLUME = {1},
YEAR = {2000},
NUMBER = {4},
PAGES = {79--98},
URL = {http://www.techscience.com/CMES/v1n4/24711},
ISSN = {1526-1506},
ABSTRACT = {This paper presents the three-dimensional scattering field obtained when 2D smooth topographical deformations are subjected to a dilatational point load placed at some point in the medium. The solution is formulated using boundary elements for a wide range of frequencies and spatially harmonic line loads, which are then used to obtain time series by means of (fast) inverse Fourier transforms into space-time. The topographical surface is modeled with a number of boundary elements, defined according to the excitation frequency of the harmonic source, and in such a way that the free surface can be discretized along a sufficient distance to fully reproduce the responses at the receivers in the time window considered (<i>T = 1/&Delta;f</i>). <br/>
 Simulation analyses utilizing this idealized model are used to study the alteration of the wave scattering generated by the half-space, when the free surface is changed to simulate a ridge or a valley deformation. The amplitude of the wavefield in the frequency vs axial-wavenumber domain is presented to allow the recognition, identification, and physical interpretation of the variation of the wavefield.},
DOI = {10.3970/cmes.2000.001.531}
}