Element-free Method Forward Modeling for GPR Based on an Improved Sarma-type
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Release time:2020-08-08 Impact Factor:1.534 DOI number:10.2113/jeeg19.4.277 Journal:Journal of Environmental and Engineering Geophysics Place of Publication:UNITED STATES Abstract:We improve the resolution and accuracy of ground-penetrating radar (GPR) forward modeling by applying the mesh-less algorithm element-free method (EFM), which is widely used in the electromagnetic field for numerical simulation. EFM dispenses with the concepts of elements, needs only a mass of node information, and adopts the moving least squares (MLS) method to structure a shape function. Advantages of EFM are simple preprocessing, high accuracy, and high successively independent variable solutions. We start with the GPR wave equation, and then discuss the EFM approach and how to combine an improved Sarma absorbing boundary with EFM for GPR forward modeling. We simulate two 2-D models with typical electrical properties. The results show that EFM can calculate stable geo-electric GPR models because the improved Sarma absorbing boundary can absorb incident GPR waves near the model boundary effectively. Co-author:冯德山, 戴前伟 First Author:王洪华 Indexed by:Applied Research Document Code:DOI：10.2113/JEEG19.4.277 Discipline:地质资源与地质工程 Document Type:J Volume:19 Issue:4 ISSN No.:1083-1363 Translation or Not:no Date of Publication:2014-04-27 Included Journals:SCI -
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