Numerical Modeling Of Seismic Wave Propagation

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Numerical Modeling Of Seismic Wave Propagation

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Author : K. R. Kelly
language : en
Publisher:
Release Date : 1999

Numerical Modeling Of Seismic Wave Propagation written by K. R. Kelly and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.

Numerical Modeling Of Seismic Wave Propagation

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Author : Johan O. A. Robertsson
language : en
Publisher: SEG Books
Release Date : 2012

Numerical Modeling Of Seismic Wave Propagation written by Johan O. A. Robertsson and has been published by SEG Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Nature categories.

The decades following SEG's 1990 volume on numerical modeling showed a step change in the application and use of full wave equation modeling methods enabled by the increase in computational power. Full waveform inversion, reverse time migration, and 3D elastic finite-difference synthetic data generation are examples. A searchable CD is included.

Numerical Modeling Of Seismic Wave Propagation

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Author : H. Igel
language : en
Publisher:
Release Date : 2000

Numerical Modeling Of Seismic Wave Propagation written by H. Igel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

Observation And Numerical Modeling Of Seismic Wave Propagation In Both Isotropic And Anisotropic Media

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Author : Xiaoping Yang
language : en
Publisher:
Release Date : 1995

Observation And Numerical Modeling Of Seismic Wave Propagation In Both Isotropic And Anisotropic Media written by Xiaoping Yang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.

Numerical Modeling Of Global Seismic Wave Propagation

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Author : H. Igel (geofysicus.)
language : en
Publisher:
Release Date : 1999

Numerical Modeling Of Global Seismic Wave Propagation written by H. Igel (geofysicus.) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Seismic wave propagation categories.

Numerical Modeling Of Seismic Wave Propagation In Underground Mines

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Author : Xin Wang
language : en
Publisher:
Release Date : 2015

Numerical Modeling Of Seismic Wave Propagation In Underground Mines written by Xin Wang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.

The phenomenon of rockburst damage localization, which is not well understood, has been observed in deep underground mines. Analysis of seismic wave propagation in underground mines is of great interest for improved understanding of the dynamic rock failure problem. This thesis aims at making a contribution for improving understanding of the seismic wave propagation in deep underground mines. Advanced numerical modeling tools are used and new modeling techniques are developed to attain this goal. In this thesis, research is emphasized on the ground motion around excavations due to seismic wave propagation that results from a fault-slip seismic event in the far-field and the near-field. It is found that moment tensor point source model seems to be suitable for the source representation in the far-field and the non-point source model (such as kinematic rupture source model) seems to be suitable for the source representation in the near-field. The modeling results confirm that ground motion is influenced by many factors such as target-source distance, slip direction, spatial location, and geometrical and geological conditions. Influence of wavelength-to-excavation span (/D) ratio on the wavefield is investigated to gain insights of ground motion behavior under both quasi-static and dynamic loading conditions. It is revealed that PPV (peak particle velocity) values increase as the /D ratio increases and the amplification effect increases as the /D ratio decreases. The loading condition maybe changed from the dynamic loading to the quasi-static condition when the /D is larger than 30. Strong dynamic loading should be considered when the /D ratio is small (less than 10, with a shear wavelength less than 50 m and an excavation span greater than 5 m) for most underground excavations. A method is proposed to estimate the quality factor (a measure of energy loss per oscillation cycle) for shear waves propagating in underground hard rocks so as to gain insight into the influence of internal attenuation on seismic wave propagation. A proper shear wave quality factor can be obtained by comparing modeling results with that from a scaling law, even if there are no high quality data for quality factor back analysis. Furthermore, the influence of different geological structures on seismic wave propagation is studied. It is shown that wave propagation patterns around an excavation can be altered and PPV amplification and shielding effect can occur near the excavation boundaries amongst other reasons due to heterogeneities such as tunnels, open and backfilled stopes, and dykes in underground mines. Finally, a coupled numerical procedure, which couples FLAC and SPECFEM2D, is developed to consider the excavation effect on ground motion. The FLAC model considers the excavationinduced stress change and rock mass failure, and passes the input data to SPECFEM2D by invoking FISH scripts. In addition, a new nonlinear velocity model that considers the influence of confinement and rock mass failure on wave velocity is presented. This nonlinear velocity model and the coupled numerical technique are used to model a simple stope excavation problem. It is found that there is a large difference in the wavefields and ground motions between the results from the uniform and non-uniform velocity models. A relatively stronger amplification is observed in the low confinement zones and on the excavation surface in the non-uniform velocity models. Because stress redistribution and rock mass failure around an excavation are considered, a realistic non-uniform velocity field can be obtained. The proposed coupled numerical procedure offers a method to improve the understanding of the site amplification effect and ground motion near excavation boundaries. This thesis presents some insights with regard to seismic wave propagation due to fault-slip seismic events in underground mines. If seismic wave propagation in underground mines can be modeled properly using techniques such as these presented in this thesis, then it is possible to conduct forensic analysis after a large seismic event so as to explain one of many factors that caused rockburst damage localization. Alternatively, the modeling approach may provide valuable inputs for decision-making with regard to strengthening high risk areas to prevent rockburst, thus improving mine safety.

Mathematical Studies In Nonlinear Wave Propagation

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Author : Dominic P. Clemence
language : en
Publisher: American Mathematical Soc.
Release Date : 2005

Mathematical Studies In Nonlinear Wave Propagation written by Dominic P. Clemence and has been published by American Mathematical Soc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Mathematics categories.

Lively discussions and stimulating research were part of a five-day conference on Mathematical Methods in Nonlinear Wave Propagation sponsored by the NSF and CBMS. This volume is a collection of lectures and papers stemming from that event. Leading experts present dynamical systems and chaos, scattering and spectral theory, nonlinear wave equations, optimal control, optical waveguide design, and numerical simulation. The book is suitable for a diverse audience of mathematical specialists interested in fiber optic communications and other nonlinear phenomena. It is also suitable for engineers and other scientists interested in the mathematics of nonlinear wave propagation.

The Finite Difference Modelling Of Earthquake Motions

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Author : Peter Moczo
language : en
Publisher: Cambridge University Press
Release Date : 2014-04-24

The Finite Difference Modelling Of Earthquake Motions written by Peter Moczo and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-04-24 with Mathematics categories.

A systematic tutorial introduction to the finite-difference (FD) numerical modelling technique for professionals, academic researchers, and graduate students in seismology.

Seismic Waves

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Author : Masaki Kanao
language : en
Publisher: BoD – Books on Demand
Release Date : 2012-01-25

Seismic Waves written by Masaki Kanao and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-01-25 with Science categories.

The importance of seismic wave research lies not only in our ability to understand and predict earthquakes and tsunamis, it also reveals information on the Earth's composition and features in much the same way as it led to the discovery of Mohorovicic's discontinuity. As our theoretical understanding of the physics behind seismic waves has grown, physical and numerical modeling have greatly advanced and now augment applied seismology for better prediction and engineering practices. This has led to some novel applications such as using artificially-induced shocks for exploration of the Earth's subsurface and seismic stimulation for increasing the productivity of oil wells. This book demonstrates the latest techniques and advances in seismic wave analysis from theoretical approach, data acquisition and interpretation, to analyses and numerical simulations, as well as research applications. A review process was conducted in cooperation with sincere support by Drs. Hiroshi Takenaka, Yoshio Murai, Jun Matsushima, and Genti Toyokuni.

Computational Seismology

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Author : Heiner Igel
language : en
Publisher: Oxford University Press
Release Date : 2017

Computational Seismology written by Heiner Igel and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with Computers categories.

This book is an introductory text to a range of numerical methods used today to simulate time-dependent processes in Earth science, physics, engineering, and many other fields. It looks under the hood of current simulation technology and provides guidelines on what to look out for when carrying out sophisticated simulation tasks.