Accession Number : ADA298206

Title :   Multimaterial Eulerian and Coupled Lagrangian-Eulerian Finite Element Analysis of Underwater Shock Problems.

Descriptive Note : Progress rept. 1 Oct 94-1 Aug 95,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Chisum, J. E. ; Shin, Y. S.

PDF Url : ADA298206

Report Date : 01 AUG 1995

Pagination or Media Count : 134

Abstract : The application of coupled Lagrangian-Eulerian and multimatenal Eulerian finite element analysis to problems of interest in underwater shock research was investigated. Analyses were conducted for the classical problems of a spherical shell and an infinite cylinder loaded by a plane acoustic step wave, and for the expansion and collapse of explosion generated gas bubbles in deep water. Results for the elastic response of a spirical shell and an infinite cylinder were found to be in excellent agreement with the analytical solution results, and results for the expansion and collapse of a deep explosion generated gas bubble in the absence of nearby boundary surfaces were found to agree well with experimental results. Several analyses were conducted with explosive charges detonated at various distances from a rigid wall; results from these analyses were in qualitative agreement with what is known about this case, and serve to characterize the behavior of the resulting bubble in terms of the distance to the wall. (AN)

Descriptors :   *FINITE ELEMENT ANALYSIS, *SHOCK WAVES, *BUBBLES, *UNDERWATER EXPLOSIONS, COMPUTER PROGRAM DOCUMENTATION, MATHEMATICAL MODELS, ACOUSTIC WAVES, MATHEMATICAL PROGRAMMING, BOUNDARIES, EULER EQUATIONS, UNDERWATER ACOUSTICS, SEA WATER, DEEP WATER, PLANE WAVES, GAS SURFACE INTERACTIONS, DETONATIONS, ACOUSTIC FIELDS, EQUATIONS OF STATE, LAGRANGIAN FUNCTIONS, EXPLOSION GASES.

Subject Categories : Acoustics
      Fluid Mechanics
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE