An Analysis of Explosion-Induced Bending Damage in Submerged Shell Targets,
Abstract
An underwater explosion gives rise to a violently oscillating bubble containing detonation gases. The oscillations cause pulses to impinge on a nearby submerged structure which, under some conditions, produce low frequency bending motion. The amplitude of the bending motion frequently is large enough to correspond to severe plastic deformation and bend-buckling. An analysis for this problem can be performed by treating the structure as a cylindrical shell subjected to two end couples set up by longitudinal membrane stresses. Such stresses are known to induce axial buckling and/or ovalization or plastification of the cross-section. As a first approximation, and in view of the low frequency response, inertia is neglected in this analysis. Bending moment and work done on the structure are determined as a function of mean curvature. Computational results are presented for several shell geometries and published experimental data for these models compare favorably with the computations. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1984
- Accession Number
- ADA169009
Entities
People
- Minos Moussouros
Organizations
- Naval Surface Warfare Center Dahlgren Division