Accession Number : AD0617768

Title :   EFFECT OF A SHOCK WAVE ON A FLOATING RIGIDPLASTIC BOX STRUCTURE.

Descriptive Note : Technical rept.,

Corporate Author : COLUMBIA UNIV NEW YORK DEPT OF CIVIL ENGINEERING AND ENGINEERING MECHANICS

Personal Author(s) : Testa,R. B. ; Bleich,H. H.

Report Date : APR 1965

Pagination or Media Count : 46

Abstract : A method is presented to determine the deformations of a rigid-plastic box structure which floats on the surface of a fluid and contains an internal, elastically supported mass. The situation is a simple representation of a surface vessel in which plastic deformations resulting from an underwater shock greatly exceed the elastic deformations. The method is applied to the case of symmetric initial velocity distribution, excluding buoyancy effects. Numerical solutions for two simple initial velocities are obtained for the complete range of a significant parameter. The results indicate that when substantial plastic deformations occur, the solution consists of many phases, in each of which a certain group of plastic hinges is active. If the number of plastic hinges (and degrees of freedom) becomes large, the number of phases in a solution may become excessively large, and the conditions separating them are very complicated. (Author)

Descriptors :   (*SHOCK WAVES, FLOATING BODIES), (*HYDRODYNAMICS, FLOATING BODIES), PLASTIC PROPERTIES, DEFORMATION, STRUCTURES, MOTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE