A three-dimensional indirect boundary integral equation method for modeling elastic wave scattering in a layered half-space

Liu, Z; Huang, L; Liang, J; Wu, C

A three-dimensional indirect boundary integral equation method for modeling elastic wave scattering in a layered half-space

Liu, Z Huang, L Liang, J Wu, C

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Publication Type:: Journal Article
Citation:: International Journal of Solids and Structures, 2019, 169 pp. 81 - 94
Issue Date:: 2019-09-01

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Field	Value	Language
dc.contributor.author	Liu, Z	en_US
dc.contributor.author	Huang, L	en_US
dc.contributor.author	Liang, J	en_US
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934	en_US
dc.date.issued	2019-09-01	en_US
dc.identifier.citation	International Journal of Solids and Structures, 2019, 169 pp. 81 - 94	en_US
dc.identifier.issn	0020-7683	en_US
dc.identifier.uri	http://hdl.handle.net/10453/134826
dc.description.abstract	© 2019 A new indirect boundary integral equation method (IBIEM)is proposed in this study to solve three-dimensional (3-D)elastic wave scattering by heterogeneities in a multi-layered half-space, employing Green's function of distributed loads on equivalent circular elements, thus avoiding the element discretization on layer interfaces. The proposed method enables the fictitious loads to be directly distributed on the surfaces of scatterer and the weak singularity to be tackled by analytical integration. Also, the radiation condition in the semi-infinite layered medium can be satisfied accurately, and the memory requirements can also be greatly reduced, especially for a large number of layers or gradient medium. The numerical accuracy was verified through comparisons with existing results and the numerical convergence was also confirmed. The results clearly demonstrate the simplicity and effectiveness of the method, and also reveals the complicated scattering characteristics in a layered half-space that are dominated by the resonant properties of the layered medium.	en_US
dc.relation.ispartof	International Journal of Solids and Structures	en_US
dc.relation.isbasedon	10.1016/j.ijsolstr.2019.03.020	en_US
dc.subject.classification	Mechanical Engineering & Transports	en_US
dc.title	A three-dimensional indirect boundary integral equation method for modeling elastic wave scattering in a layered half-space	en_US
dc.type	Journal Article
utslib.citation.volume	169	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	169	en_US

Abstract:

© 2019 A new indirect boundary integral equation method (IBIEM)is proposed in this study to solve three-dimensional (3-D)elastic wave scattering by heterogeneities in a multi-layered half-space, employing Green's function of distributed loads on equivalent circular elements, thus avoiding the element discretization on layer interfaces. The proposed method enables the fictitious loads to be directly distributed on the surfaces of scatterer and the weak singularity to be tackled by analytical integration. Also, the radiation condition in the semi-infinite layered medium can be satisfied accurately, and the memory requirements can also be greatly reduced, especially for a large number of layers or gradient medium. The numerical accuracy was verified through comparisons with existing results and the numerical convergence was also confirmed. The results clearly demonstrate the simplicity and effectiveness of the method, and also reveals the complicated scattering characteristics in a layered half-space that are dominated by the resonant properties of the layered medium.

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http://hdl.handle.net/10453/134826