FATIGUE RELIABILITY INVESTIGATION FOR MARINE STRUCTURES USING A RESPONSE SURFACE METHOD

A method is presented to assess the fatigue reliability of marine structures. Hydrodynamic loads due to motions in waves are calculated using a 3D-diffraction theory. Stresses due to dead and service loads and stress spectra due to loads are calculated at locations with extreme stress concentration (hot-spots) using the Finite Element method. Material deterioration is considered due to crack propagation. Load and resistance parameters are assumed to be uncertain. Modern reliability methods are applied to calculate efficiently failure probabilities. The Finite Element analysis and the reliability calculation is linked through a response surface program using Hermite polynomials. The method is illustrated with a fatigue life estimation of the hatch corner of a third generation containership.

• Supplemental Notes:
  • OMAE 1991, 10th Intl Conf on Offshore Mechanics & Arctic Engng; 23-28 June 1992; Stavanger, Norway. Sponsored by ASME et al. Procs. Publ by ASME, Vol II, p 247 [8 p, 15 ref, 4 tab, 8 fig]
• Authors:
  • Schall, G
  • Scharrer, M
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); Numerical analysis; Structural analysis; Structural mechanics
• Uncontrolled Terms: Fatigue life; Structural response
• Old TRIS Terms: Hydrodynamic loads
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00703115
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM