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Rayleigh wave inversion method and its application

Author: WangZanWen
Tutor: SunYuan
School: Chang'an University
Course: Earth Exploration and Information Technology
Keywords: Rayleigh wave Dispersion function Forward Inversion SPT blow count (N63.5) Capacity Regression Analysis
CLC: P631.4
Type: Master's thesis
Year: 2005
Downloads: 398
Quote: 4
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Abstract


Because the Earth's surface is completely non- media flexibility, resulting in the spread of Rayleigh wave velocity with which the frequency changes, a phenomenon known as Rayleigh wave (Rayleigh wave) dispersion phenomena . Be seen , the use of Rayleigh wave dispersion characteristics , can reveal the nature of the subsurface and structural changes . Papers in Rayleigh theoretical analysis and previous work , based on the multi- media derived Rayleigh dispersion equation and use the normalization method and a layer segmentation method Knopoff fast algorithm has been improved solve the Rayleigh wave dispersion curves forward computation numeric overflow exists high frequency range , the effective number loss , the upper frequency is not high enough to make the maximum frequency increase 800Hz; at forward , based on the use of adaptive iterative damped least squares inversion algorithm , on the theory model inversion , and the results were analyzed ; eventually , according to the actual exploration of shallow surface wave data inversion calculation carried out to establish the dispersion characteristics and associated geotechnical parameters of the relational model , analyze and predict the actual exploration area of geotechnical parameters of the vertical and horizontal distribution characteristics and laws for the evaluation and classification of rock media disaster geological phenomena surveys provide a more reliable basis.

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CLC: > Astronomy,Earth Sciences > Geology > Geology, mineral prospecting and exploration > Geophysical exploration > Seismic exploration
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