WEIGHT ESTIMATES OF RING-STIFFENED, TRUNCATED CONE SHELLS, SUBJECTED TO EXTERNAL PRESSURE AND AXIAL COMPRESSION SIMULTANEOUSLY,
Abstract
Approximate expressions are evolved for the required weight of truncated, conical shells, stiffened at equal intervals with rings. Three cases of loading are considered, namely, external pressure only, axial compression only and a combination of the two. In the first and third loading cases, the number of ring-stiffened bays is determined by successive computations, until the number of stiffener rings is found for which the over-all weight of the structure is a minimum. Expressions are presented which -- for a given shell geometry and given loading -- define the weight, the skin thicknesses of each bay and the stiffener-ring thicknesses, provided the following quantities are specified: Modulus of elasticity and density of shell- and stiffener-material, half-angle of truncated cone shell, base and top radii, applied external pressure and applied axial compression force. The example problem further shows that minimumweight design entails a structure with a large number of stiffener rings with relatively small width- and thicknessdimensions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 29, 1960
- Accession Number
- AD0607694
Entities
People
- Henry W. Baer
Organizations
- TRW Inc.