Accession Number : ADA259433


Title :   Analysis of Prolate Spheroidal Shell Under Undex Load


Descriptive Note : Technical rept. 1 Mar 89-31 Aug 90,


Corporate Author : CHARLES STARK DRAPER LAB INC CAMBRIDGE MA


Personal Author(s) : Nokes, David S


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259433.pdf


Report Date : 01 Dec 1992


Pagination or Media Count : 57


Abstract : This effort was an attempt to verify a newly developed closed-formed solution to the transient response of a submerged prolate spheroidal shell structure due to underwater explosive shock loading. Numerical solutions were attempted for three test cases ranging from a sphere to an elongated spheroidal shell approximating the shape of a submarine. Results for the spherical case were exactly the same as for the previously reported theory which is restricted to spheres. The results for the elongated spheroidal shells were in error, with the magnitude of the errors increasing as the amount of elongation increased. The errors appear to result from truncation of the infinite series solutions. As a result, useful results could not be obtained using currently reasonable computer resources.... Spheroidal Shell, Underwater Shock, Fluid-Solid Interaction, Undex Load, Shell Theory.


Descriptors :   *SHOCK WAVES , *SHELLS(STRUCTURAL FORMS) , *UNDERWATER EXPLOSIONS , *EXPLOSION EFFECTS , *SUBMARINES , TEST AND EVALUATION , SPHERES , SHOCK , ELONGATION , UNDERWATER , FLUIDS , INFINITE SERIES , ERRORS , STRUCTURAL RESPONSE , SOLIDS , INTERACTIONS , LOADS(FORCES)


Subject Categories : Marine Engineering
      Structural Engineering and Building Technology
      Explosions


Distribution Statement : APPROVED FOR PUBLIC RELEASE