| Autor: |
Strouboulis, T., Babuška, I., Gangaraj, S. K. |
| Zdroj: |
International Journal for Numerical Methods in Engineering; 10 - 30 January 2000, Vol. 47 Issue: 1-3 p427-475, 49p |
| Abstrakt: |
This paper addresses the computation of guaranteed upper and lower bounds for the energy norm of the exact error in the finite element solution. These bounds are constructed in terms of the solutions of local residual problems with equilibrated residual loads and are rather sharp, even for coarse meshes. he sharpness of the bounds can be further improved by employing few iterations of a relatively inexpensive iterative scheme. he main result is that the bounds are guaranteed for the nergy norm of the exact error, unlike the bounds which ave been proposed in [13,14] which are guaranteed only for the nergy norm of the error with respect to an enriched (truth-esh) finite element solution. Copyright © 2000 John Wiley & Sons, Ltd. |
| Databáze: |
Supplemental Index |
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