Acoustic and Elastic Wave Fields in Geophysics, Part II: Methods in Geochemistry and Geophysics, cartea 37
Autor A.L. Levshin, K.L. Larner, Avital Kaufmanen Limba Engleză Hardback – 10 oct 2002
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Specificații
ISBN-13: 9780444506429
ISBN-10: 044450642X
Pagini: 630
Dimensiuni: 156 x 234 x 35 mm
Greutate: 1.05 kg
Editura: ELSEVIER SCIENCE
Seria Methods in Geochemistry and Geophysics
ISBN-10: 044450642X
Pagini: 630
Dimensiuni: 156 x 234 x 35 mm
Greutate: 1.05 kg
Editura: ELSEVIER SCIENCE
Seria Methods in Geochemistry and Geophysics
Cuprins
Introduction. List of symbols. 1. Principles of geometrical acoustics. Transition of high-frequency acoustics. Reflected waves in media with plane interfaces. Head waves in media with plane interfaces. Wavefront construction and ray tracing. Fermat's principle and ray equations. 2. Dynamics of high-frequency wave fields. Orientation of Poynting vector and rays at high-frequency spectrum. Amplitude A0 along a ray. Reflected and transmitted waves in presence of boundary. Wave field near caustic. Fresnel volume and physical meaning of ray. 3. Basics of Kirchhoff migration. Time fields and reconstruction of reflector. Principles of Kirchhoff migration. 4. Plane waves in layered media (normal incidence). Waves in media with a single planar interface. Normal incidence of plane wave in horizontally layered media. 5. Plane waves in layered media (oblique incidence). Reflection and transmission of plane wave. Reflection and refraction of sinusoidal waves. Distribution of energy between reflected and transmitted waves. Reflection and transmission of transient plane wave. Reflection and transmission of inhomogeneous plane waves. Oblique incidence of plane waves in media with two interfaces. Wave propagation in waveguides. Waves in media with continuously changing velocity. 6. Spherical waves in the presence of horizontal interface. Spherical source in a half-space with a free or rigid surface. Spherical source in medium with plane boundary (general case). Analysis of wave fields by the stationary phase method. Head wave and integration along branch cuts. Wave and near zones. Wave asymptotics and the steepest descent method. 7. Propagation of waves inside a layer. Acoustic potential of elementary source located inside a layer. Expansion of integrands in series. Integration along branch cuts and around poles. Normal modes. Asymptotic behavior of waves related to potential U. Transient waves inside a layer. Evaluation of normal modes. 8. Acoustic potential in medium with a cylindrical interface. Solution of the boundary value problem. Normal modes inside the cylinder. Head wave in borehole. Appendices. Appendix A. Functions of complex variables. Appendix B. Hilbert transform. Appendix C. The saddle point method. Appendix D. Different equations. References. Index.