Accession Number : AD0686157

Title :   TRANSIENT RESPONSE OF A RING-STIFFENED SPHERICAL SHELL IMMERSED IN AN ACOUSTIC MEDIUM.

Descriptive Note : Research rept.,

Corporate Author : POLYTECHNIC INST OF BROOKLYN N Y DEPT OF AEROSPACE ENGINEERING AND APPLIED MECHANICS

Personal Author(s) : Lou,Yung Kia ; Klosner,Jerome M.

Report Date : APR 1969

Pagination or Media Count : 65

Abstract : The transient response of a ring-stiffened spherical shell to a sudden pressure increase in the surrounding acoustic medium is investigated. A modal expansion approach is used to analyze the shell, while the acoustic field equation is solved by invoking the Helmholtz integral. Coupling of the two fields occurs through the enforcement of continuity of the velocity components at the shell-fluid interface. Two solutions to the same problem are obtained by using plane and cylindrical wave approximations of the acoustic field. These approximate solutions fail to predict the transient behavior for the shell configuration analyzed. The result of this study indicates that a large dynamic factor must be assumed in the design of submerged stiffened spherical shell structures, if explosive loads are likely to be encountered. (Author)

Descriptors :   (*SHELLS(STRUCTURAL FORMS), TRANSIENTS), UNDERWATER EQUIPMENT, SOUND TRANSMISSION, SPHERES, PRESSURE, INTERFACES, UNDERWATER EXPLOSIONS

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE