Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 69 for “"Elastic Wave"”.
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Elastic Wave Propagation in Rods and Bars
Made available in DSpace on 2014-12-14T14:42:18Z (GMT). No. of bitstreams: 1 8009217.pdf: 2610408 bytes, checksum: e5f3b5bd5f5af2743cfec0ca3459dfd1 (MD5) Previous issue date: 1979
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Elastic wave scattering in laterally inhomogeneous media
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 1991
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Study in visco-elastic wave propagation by photoviscoelasticity, A
Includes bibliographical references.
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Elastic wave scattering from bounded media with random microstructures
A first-order Born approximation is utilized to solve the direct and inverse scattering problems of bounded infinite media with random microstructures. The inhomogeneities of the media properties due to their microstructures are assumed to be small. Relatively simple relations are obtained between …
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Elastic wave propagation and scattering in anisotropic fractured media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Elastic wave radiation from borehold seismic sources in anisotropic media
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
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Elastic wave propagation along a borehole in an anisotropic medium
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1990.
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Linear and nonlinear elastic wave propagation in a fluid-filled borehole
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1993.
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Modeling and characterization of elastic wave propagation in micro-scale photonic crystals
… another material, leading to periodic changes in elastic properties of the composite structure. Such devices exhibit elastic bandgaps, which are very useful in many commercial applications. Filtering, guiding and mirroring of elastic waves are a few applications in which phononic crystals can be …
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Modeling of Electromagnetic and Elastic Wave Fields in Complex Geophysical Sensing Environments
… on the second-order partial differential vector wave equation of the magnetic fields in the frequency domain. The new code can be used to model very complex geometries with high medium contrast. Interesting simulation results are obtained for the NMR antenna.
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Tailoring elastic wave propagation at the macro and microscale via intentional nonlinearity
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01
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Elastic wave propagation in anisotropic media : source theory, traveltime computations and migration
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1992.
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An axisymmetric finite element solution for elastic wave propagation through threaded connections
… element solution method is developed for axial wave propagation through a series of threaded connections in rock drills. A piston impacts axially on a string of rods held together by threaded joints and the wave propagates through these joints before reaching the bit. The energy lost in the …
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On axially symmetric elastic wave propagation in a fluid-filled cylindrical shell
… constituting a special case of axially symmetric elastic wave propagation in a fluid-filled cylindrical shell. Many of the objectionable features of the elementary (Joukowsky) water hammer theory are removed, and particular emphasis is placed upon consideration of the effects of radial inertia of …
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Statistical model for the prediction of elastic wave scattering from finite complicated shells
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1996.
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Numerical modeling, suppression, and imaging of elastic wave scattering by near-surface heterogeneities
… of near-surface heterogeneities on seismic wavefield scattering for better understanding of land seismic data, develop an effective approach to filter out the scattered noise from the seismic records to enhance the signal-to-noise ratio, and to accurately image and locate the near-surface …
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Elastic wave tailoring at the macro/micro/nano- scales using intentional strongly nonlinear coupling
In acoustics, wave tailoring refers to the manipulation of the propagation of waves or energy that are generated due to some form of dynamic loading. It includes real world examples ranging from impact mitigation to sensors and communication applications and is typically accomplished through the …
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Modeling of elastic wave propagation in a fluid-filled borehole excited by a piezoelectric transducer.
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1991.
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Elastic-Wave Imaging Using P-P, Sh-Sh, and Sv-P Events: Modeling and Data Processing
… a conventional P-P section and a converted-wave SV-P section. Radiation patterns are calculated based on Miller and Pursey’s equations that show P- and S-wave radiation from a vertical point source. Elastic modeling is performed for simple models to study the P- and S-wave modes propagating …
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