Numerische Mathematik

, Volume 95, Issue 1, pp 29–51 | Cite as

Finite element analysis of pressure formulation of the elastoacoustic problem

  • A. Bermúdez
  • P. Gamallo
  • L. Hervella-Nieto
  • R. Rodríguez


In this paper we analyze the non symmetric pressure/displacement formulation of the elastoacoustic vibration problem and show its equivalence with the (symmetric) stiffness coupling formulation. We introduce discretizations for these problems based on Lagrangian finite elements. We show that both formulations are also equivalent at discrete level and prove optimal error estimates for eigenfunctions and eigenvalues. Both formulations are rewritten such as to be solved with a standard Matlab eigensolver. We report numerical results comparing the efficiency of the methods over some test examples.


Error Estimate Finite Element Analysis Pressure Formulation Discrete Level Vibration Problem 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • A. Bermúdez
    • 1
  • P. Gamallo
    • 2
  • L. Hervella-Nieto
    • 3
  • R. Rodríguez
    • 4
  1. 1.Departamento de Matemática AplicadaUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Departamento de Matemática AplicadaUniversidade de Santiago de CompostelaSantiago de CompostelaSpain
  3. 3.Departamento de MatemáticasUniversidade da CoruñaA CoruñaSpain
  4. 4.GI2MA, Departamento de Ingeniería MatemáticaUniversidad de ConcepciónConcepciónChile

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