PERFECTLY MATCHED LAYERS FOR THE SIMULATION OF ELASTIC WAVES IN ANISOTROPIC MEDIA
- Authors
- 강준원
- Issue Date
- 24-Jun-2019
- Publisher
- National Technical University of Athens
- Citation
- Proceedings of 7th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, v.N/A, no.N/A, pp.1 - 1
- Journal Title
- Proceedings of 7th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
- Volume
- N/A
- Number
- N/A
- Start Page
- 1
- End Page
- 1
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/1420
- Abstract
- This paper introduces perfectly matched layers (PMLs) for the simulation of elastic waves in heterogeneous anisotropic media. The PMLs are used as wave-absorbing boundaries to sur-round a finite computational domain of interest truncated from the originally semi-infinite ex-tent. In the formulation, standard Navier equations governing the wave motion in the regular domain are combined with mixed unsplit-field equations which yield the solution of attenuated waves within the PML. For the modeling of anisotropic material properties, the strain-stress relationship of the anisotropic material is incorporated into the constitutive relation of the mixed unsplit-field wave equations in PML-truncated domains. In this work, a transversely iso-tropic material is considered for elastic waves in a semi-infinite domain truncated by PML. The second-order semi-discrete form of the problem is constructed by using a mixed finite element method and integrated in time for the solution of displacements and stresses by using the New-mark time integration method. Numerical results are presented for elastic waves propagating in the transversely isotropic PML-truncated domain. The wave motion in the anisotropic me-dium is compared with that in the corresponding isotropic medium, and the effect of wave at-tenuation enforced by the developed anisotropic PML is shown by a series of numerical examples.
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Collections - College of Engineering > Department of Civil Engineering > 1. Journal Articles
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