The present book — which is the third, significantly revised edition of the textbook originally published by Elsevier Science — emphasizes the interdependence of mathematical formulation and physical meaning in the description of seismic phenomena. Herein, we use aspects of continuum mechanics, wave theory and ray theory to explain phenomena resulting from the propagation of seismic waves. The book is divided into three main sections: Elastic Continua, Waves and Rays and Variational Formulation of Rays. There is also a fourth part, which consists of appendices. In Elastic Continua, we use continuum mechanics to describe the material through which seismic waves propagate, and to formulate a system of equations to study the behaviour of such a material. In Waves and Rays, we use these equations to identify the types of body waves propagating in elastic continua as well as to express their velocities and displacements in terms of the properties of these continua. To solve the equations of motion in anisotropic inhomogeneous continua, we invoke the concept of a ray. In Variational Formulation of Rays, we show that, in elastic continua, a ray is tantamount to a trajectory along which a seismic signal propagates in accordance with the variational principle of stationary traveltime. Consequently, many seismic problems in elastic continua can be conveniently formulated and solved using the calculus of variations. In the Appendices, we describe two mathematical concepts that are used in the book; namely, homogeneity of a function and Legendre's transformation. This section also contains a list of symbols. Contents: Elastic Continua: Deformations Forces and Balance Principles Stress-Strain Equations Strain Energy Material Symmetry Waves and Rays: Equations of Motion: Isotropic Homogenous Continua Equations of Motion: Anisotropic Inhomogeneous Continua Hamilton's Ray Equations Christoffel's Equations Reflection and Transmission Lagrange's Ray Equations Variational Formulation of Rays: Euler's Equations Variational Principles Ray Parameters Appendices: Euler's Homogeneous-Function Theorem Legendre's Transformation List of Symbols
- ISBN: 978-981-4641-75-3
- Editorial: WORLD SCIENTIFIC PUB.CO.PTE.
- Encuadernacion: Tela
- Páginas: 656
- Fecha Publicación: 01/02/2015
- Nº Volúmenes: 1
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