| Popis: |
Fluid-structure interaction problems involving the harmonic vibration of plates may be analyzed by employing an assumed modes approach. The associated hydrodynamic problem may be solved employing boundary element or finite element (FE) methods. An infinitely long multi-panel plate, having uniform spans and vibrating in contact with a fluid is considered here. A typical single span panel of the multi-panel system is set in a rigid baffle and the semi-infinite fluid domain over it is truncated. A FE model for the Helmholtz equation is employed over this domain, and suitable dampers are used on the truncation boundary to impose the radiation boundary condition. The FE solution is used to set up an eigenfunction expansion of the acoustic field outside the FE domain. Such an approach has originally been developed for exterior acoustic problems [C.P. Vendhan and C. Prabavathi, J. Vib. and Acoust., 118, 1996, 575-582]. The pressure field on the single panel and the infinite baffle is used to obtain the modal rad... |
