BUCKLING ANALYSIS OF RING-STIFFENED OVAL ORTHOTROPIC CYLINDRICAL SHELLS

An energy principle is employed to derive the equations governing the stability of a simply-supported, eccentrically ring-stiffened, oval, orthotropic cylindrical shell. The kinematic equations are those of Love-type shell theory and the effect of the reinforcing rings is accounted for by a distributed stiffness approach. The cylinder is subjected to a combination of uniform lateral and axial pressures. It is determined that the domain of stability of a stiffened cylinder is bounded by two separate solutions denoted as "long" and "short" axial wavelength solutions, the extent of the short wavelength solution being dependent upon the degree of stiffening afforded by the rings. The analysis of the effects of ring eccentricity shows that outside rings provide the greatest capacity for sustaining axial compression, while inside rings are capable of supporting the greatest lateral pressure. Finally, it is found that the buckling load of an oval cylinder under uniform lateral pressure slightly exceeds the corresponding value for an equivalent circular cylinder. As a further verification of this phenomenon, a Rayleigh-Ritz procedure is employed to determine the buckling load of an oval ring under uniform radial load. The results of this analysis corroborate those obtained for the cylinder.

• Corporate Authors:

  Polytechnic Institute of Brooklyn

  Department of Aerospace Engineering and Applied Mechanics
  Brooklyn, NY  United States  11201
• Authors:
  • Brodsky, W L
  • Vafakos, W P
• Publication Date: 1973-6

Media Info

• Features: References;
• Pagination: 83 p.

Subject/Index Terms

• TRT Terms: Buckling; Cylinders (Geometry); Mechanical rings; Shells (Structural forms)
• Uncontrolled Terms: Cylindrical shells
• Old TRIS Terms: Stiffening rings
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00046673
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: PIBAL Rpt #73-11
• Contract Numbers: N00014-67A-0438-0006, 064-427
• Files: TRIS
• Created Date: Sep 18 1973 12:00AM