Accession Number : AD0718328

Title :   Comparative Solutions for the Response of Restrained, Rigid-Body Underwater Structures to Acoustic Shock

Descriptive Note : Final rept. Nov 1969-Aug 1970

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : Hammer, J G ; Zwibel, H S

PDF Url : AD0718328

Report Date : Jan 1971

Pagination or Media Count : 77

Abstract : The report describes the problem of predicting the response of fixed underwater structures to a shock wave propagating through the water. Two idealized structures are considered; an elastically-restrained rigid sphere and an elastically-restrained rigid cylinder. The shock is assumed to be an exponentially-decaying pressure pulse in an acoustic fluid. Solutions to the exact equations are obtained analytically for the spherical structure and by Bellman's numerical inversion procedure for both structures. Previously obtained solutions for the restrained cylindrical structure, simplified by the Mindlin- Bleich approximation, are found to be in agreement. Response curves are given for both structural types over a range of parameters. The effects of drag are discussed.

Descriptors :   *EXPLOSION EFFECTS, *SHELLS(STRUCTURAL FORMS), FOURIER ANALYSIS, INTEGRAL TRANSFORMS, NUMERICAL ANALYSIS, OCEAN BOTTOM, SHOCK WAVES, UNDERWATER EXPLOSIONS, UNDERWATER OBJECTS

Subject Categories : Structural Engineering and Building Technology
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE