| Autor: |
Pinsky, Peter M., Abboud, Najib N. |
| Zdroj: |
Computers & Structures; January 1989, Vol. 33 Issue: 3 p621-635, 15p |
| Abstrakt: |
Two mixed variational principles for transient and harmonic analysis of non-conservative coupled exterior fluid-structure systems are proposed. The variational principles accommodate the dissipation associated with viscoelastic constitutive properties of the structure as well as the radiation boundary condition on the fluid. The principles are written for the physical system and its adjoint using the formalism introduced by Morse and Feshbach for dissipative systems. The mixed formulations use pressure and displacement potential scalar variables for the fluid and can incorporate a general class of local radiation boundary conditions. The finite element approximations based on these variational principles display a symmetric form for transient and harmonic problems. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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