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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Sato, M. |
| Copyright Year | 2006 |
| Description | Author affiliation: Fac. of Educ. & Human studies, Akita Univ. (Sato, M.) |
| Abstract | A new diagonally staggered grid configuration is proposed for the finite-difference time-domain (FDTD) analysis of elastic wave fields. The structure of the grid is the same as a standard staggered grid, but the diagonals of the standard grid lie parallel to the coordinate axes of the field of analysis in this new configuration. Adopting this grid configuration allows a natural implementation of free boundaries. In implementing these boundary conditions no virtual lattice around the analysis region is required, and so free surfaces with complex boundary shapes are easily treated. To date, free boundaries have usually been treated either using the zero-stress formulation (ZSF) or the vacuum formulation (VCF). The ZSF is relatively precise, but requires the creation of virtual grids in the vacuum region. On the other hand, the VCF does not require the use of virtual grids, but accuracy and stability are reduced relative to the VCF. The validity of the diagonally staggered grid is confirmed by comparing the calculation results of the present scheme with those derived by existing finite-difference methods for a model test problem |
| Starting Page | 1394 |
| Ending Page | 1397 |
| File Size | 285849 |
| Page Count | 4 |
| File Format | |
| ISBN | 1424402018 |
| ISSN | 10510117 |
| DOI | 10.1109/ULTSYM.2006.270 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2006-10-02 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Elastodynamics Finite difference methods Time domain analysis Shape Stability Partial differential equations Humans Boundary conditions Lattices Surface treatment |
| Content Type | Text |
| Resource Type | Article |
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