DYNAMICS OF SUBMERGED CYLINDRICAL SHELLS WITH ECCENTRIC STIFFENING
A theoretical analysis is presented for treating the free vibrations of submerged, ring-stiffened cylindrical shells with simply supported ends. The effects of the eccentric stiffeners are averaged over the thin-walled isotropic cylindrical shell. The energy method is utilized and the frequency equation is derived from Hamilton's Principle. All three degrees of freedom are considered. Numerical results are presented for the frequencies of several example shells. Comparisons with previous theoretical and experimental results indicate reasonably good agreement for shells immersed in water, but poorer agreement in vacuum. The inaccuracies are due to limitations of the Donnell type orthotropic shell theory used. The procedure appears well adapted to preliminary optimization studies of shells immersed in water under minimum natural frequency constraints and for optimal separation of the lower frequencies.
New Jersey Institute of Technology, NewarkUniversity Heights
Newark, NJ USA 07102
- Chu, KK-T
- PAPPAS, M
- Herman, H
- Publication Date: 1979-3
- Features: References;
- Pagination: 66 p.
- TRT Terms: Cylinders (Geometry); Dynamic loads; Natural frequency; Optimization; Shells (Structural forms); Structural analysis; Structural design; Vibration
- Uncontrolled Terms: Cylindrical shells; Dynamic response; Fluid-structure interaction; Natural frequencies
- Old TRIS Terms: Stiffened cylinders
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00195372
- Record Type: Publication
- Source Agency: New Jersey Institute of Technology, Newark
- Report/Paper Numbers: NJIT No. NV-13 Intrm Rpt.
- Contract Numbers: ONR N00014-75-C0987
- Files: TRIS
- Created Date: Jul 31 1979 12:00AM