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It is well known that the use of high-order methods (like spectral elements) for the simulation of wave propagation phenomena, brings a significant reduction in the size of the corresponding computational problem. On the other hand, traditional low-order techniques, like finite elements, allow a greater flexibility in dealing with problems posed on highly irregular domains or involving complex constitutive laws. These considerations motivate the interest for methods able to exploit the advantages of both approaches mentioned above. This paper analyses a hybrid finite-spectral element method for the approximation of the elastic wave equations. The analysis focuses on a coupling algorithm based on the relaxation of the continuity condition on the interface between regions where the two different methods are used, namely the mortar projection method, and show a simple numerical experiment.

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Authors: CASADEI F, JRC Ispra (IT);GABELLINI E, Centre for Research, Development and Advanced Studies, Sardinia (IT);MAGGIO F, Centre for Research, Development and Advanced Studies, Sardinia (IT);QUARTERONI A, Politecnico di Mìlano (IT)
Bibliographic Reference: Paper presented: Fourth International Conference on Mathematical and Numerical Aspects of Wave Propagation, Golden (US), June 1-5, 1998
Availability: Available from (1) as Paper EN 41211 ORA
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