International Journal of Computational Engineering ScienceVol. 01, No. 01, pp. 139-150 (2000) No AccessTRANSIENT RESPONSE OF POINT-EXCITED SUBMERGED ELLIPSOIDAL SHELLS USING IMPROVED TRANSMITTING BOUNDARIESNURI AKKAS, YUSUF ORCAN, and TURGUT TOKDEMIRNURI AKKASDepartment of Engineering Sciences, Middle East Technical University, Ankara 06531, Turkey Search for more papers by this author , YUSUF ORCANDepartment of Engineering Sciences, Middle East Technical University, Ankara 06531, Turkey Search for more papers by this author , and TURGUT TOKDEMIRDepartment of Engineering Sciences, Middle East Technical University, Ankara 06531, Turkey Search for more papers by this author https://doi.org/10.1142/S1465876300000070Cited by:0 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractTransient response of ellipsoidal shells submerged in an acoustic medium subjected to a concentrated Heaviside load at the apex is studied numerically using improved transmitting boundaries. By employing the rigorous Residual Variable Method, the second derivative in the wave equation with respect to the spatial variable extending to infinity is eliminated. The resulting modified equation is an exact boundary condition nonlocal in space requiring modal analysis. The ellipsoidal shell is considered to be enclosed by an artificial spherical truncation surface in the fluid domain on which the improved transmitting boundary condition is used. The effect of the ratio between the two radii of the submerged ellipsoidal shells on the apex deflection and on the hydrodynamic pressure at the apex is investigated. Numerical results obtained by incorporating improved transmitting boundary conditions into the finite element program are presented in graphical forms and discussed.Keywords:Solid-Fluid InteractionTransmitting BoundariesEllipsoidal Shell FiguresReferencesRelatedDetails Recommended Vol. 01, No. 01 Metrics History Received 29 July 1999 Revised 27 January 2000 KeywordsSolid-Fluid InteractionTransmitting BoundariesEllipsoidal ShellPDF download