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- W2085896373 abstract "The dynamic response of an elastic half-space due to a buried spherical source is investigated for points on the surface of the half-space. an analytical model for the spherical source is obtained by modifying the point source theory of de Hoop for a source pressure function of the form P(t)=p0tn exp(-αt). However, since any point source cannot involve reflections from the source itself, our model is only an approximation to the real case which must involve reflections from the boundary of the spherical source itself. The present treatment is also cast in a scale-independent form in order to generalize the application. A comparison of our analytical model with the results of dynamic finite-element modelling (DFEM) shows excellent agreement for deep sources. However, for near-surface sources the tails of the waveforms are quite different, although the agreement for the peak amplitudes is good. This waveform discrepancy is due to reflection from the boundary of the spherical source itself; this boundary is naturally present in the DFEM solution. Furthermore, if reflections from the source boundary are neglected, the displacement directly above a near-surface source is, to a good approximation, directly proportional to the source pressure function. On the other hand, the displacement directly above a deep source is, to a good approximation, directly proportional to the first derivative of the source pressure function." @default.
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- W2085896373 date "1994-12-01" @default.
- W2085896373 modified "2023-10-14" @default.
- W2085896373 title "Dynamic Response of A Half-Space to A Buried Spherical Source" @default.
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- W2085896373 doi "https://doi.org/10.1111/j.1365-246x.1994.tb04014.x" @default.
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