Model seismology

O'Brien, P. N. S.; Symes, M P

doi:10.1088/0034-4885/34/2/305

Cited by 29 publications

(11 citation statements)

References 60 publications

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“…Further similar observations were made when an explosion at the top edge of a resin sheet and a dynamic photoelasticity technique were utilized to observe elastic wave propagation in a half-space model (Dally and Thau 1967;Thau and Dally 1969). O'Brien and Symes (1971) obtained the same result in a two dimensional Perspex-aluminum model. In more recent times with the advent of more modern measurement techniques such as the Laser-ultrasound method, a non-contact method, S-wave has still proved elusive.…”

Section: Introductionsupporting

confidence: 57%

Observation of Shear-wave in Lambs Problem

Chang¹,

Liang²

2005

Terr. Atmos. Ocean. Sci.

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Section: Introductionsupporting

confidence: 57%

Observation of Shear-wave in Lambs Problem

Chang¹,

Liang²

2005

Terr. Atmos. Ocean. Sci.

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“…To mitigate this problem, traditional small scale analogue modeling is done with wavelengths in the millimeter to centimeter range (frequencies of 100s of kilohertz to megahertz), which means that the size of the laboratory domain (e.g., a water tank with a side length of a few meters) is typically several hundred wavelengths and the studied targets are many wavelengths in size [1,2]. In doing so, the unwanted reflections are separated in time from the signal of interest.…”

Section: Introductionmentioning

confidence: 99%

Immersive Wave Propagation Experimentation: Physical Implementation and One-Dimensional Acoustic Results

et al. 2018

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We present a fundamentally new approach to laboratory acoustic and seismic wave experimentation that enables full immersion of a physical wave propagation experiment within a virtual numerical environment. Using a recent theory of immersive boundary conditions that relies on measurements made on an inner closed surface of sensors, the output of numerous closely spaced sources around the physical domain is continuously varied in time and space. This allows waves to seamlessly propagate back and forth between both domains, without being affected by reflections at the boundaries between both domains, which enables us to virtually expand the size of the physical laboratory and operate at much lower frequencies than previously possible (sonic frequencies as low as 1 kHz). While immersive boundary conditions have been rigorously tested numerically, here we present the first proof of concept for their physical implementation with experimental results from a one-dimensional sound wave tube. These experiments demonstrate the performance and capabilities of immersive boundary conditions in canceling boundary reflections and accounting for long-range interactions with a virtual domain outside the physical experiment. Moreover, we introduce a unique high-performance acquisition, computation, and control system that will enable the real-time implementation of immersive boundary conditions in three dimensions. The system is capable of extrapolating wave fields recorded on 800 simultaneous inputs to 800 simultaneous outputs, through arbitrarily complex virtual background media with an extremely low total system latency of 200 μs. The laboratory allows studying a variety of long-standing problems and poorly understood aspects of wave physics and imaging. Moreover, such real-time immersive experimentation opens up exciting possibilities for the future of laboratory acoustic and seismic experiments and for fields such as active acoustic cloaking and holography.

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“…Experiments were performed on 2-D scale models using the ultrasonic pulse technique (Oliver, Press & Ewing 1954;O'Brien & Symes 1971). Fig.…”

Section: S C a L E Model Experimentsmentioning

confidence: 99%

Physical and numerical model study of diffraction effects on seismic profiles over simple structures

Pant

Greenhalgh

Zhou

1992

Geophysical Journal International

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S U M M A R Y 2-D scale models and synthetic seismograms have been used to study diffraction artifacts and interpretation pitfalls on seismic profiles over two classes of simpleshaped structures: a vertical fault model and a rectangular mound model.The fault throw was varied from one eighth of a wavelength (A/@ to two wavelengths (2A). For throws greater than A/2, the structure is resolved in the x-t domain but diffractions which are present convey misleading structure. Amplitude and wavelet anomalies are observed for small fault displacement (

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Model seismology

Abstract: List of symbols .

Cited by 29 publications

References 60 publications

Observation of Shear-wave in Lambs Problem

Observation of Shear-wave in Lambs Problem

Immersive Wave Propagation Experimentation: Physical Implementation and One-Dimensional Acoustic Results

Physical and numerical model study of diffraction effects on seismic profiles over simple structures

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