EFFECT OF BOUNDARY CONDITIONS ON THE EXTENT OF DAMAGE OF OFFSHORE TUBULARS DUE TO COLLISIONS

A simplified numerical procedure is proposed to trace the dynamic behaviour of offshore tubulars subjected to lateral impacts. Using this method various boundary conditions can be considered and their effects on the extent of damage may be quantified. In this method a finite difference method timewise and a spacial finite element method are adopted. The local denting and overall bending deformation of the struck tubular is represented by a non-linear spring and an elastic visco-plastic beam respectively. This numerical procedure has been substantiated using relevant experimental study results. The characteristics of the dynamic response of tubulars under lateral impacts are compared for simply supported roller and fixed end conditions and their effects on the extent of damage as specified.

• Supplemental Notes:
  • PRADS '92, 5th Intl Symp on the Practical Design of Ships and Mobile Units; 17-22 May 1992; Newcastle upon Tyne, U.K. Pprs. Publ by Elsevier Science Pubs Ltd., U.K., Vol 2, p 2.994 [13 p, 16 ref, 2 tab, 5 fig]
• Authors:
  • Sang-Rai, C
  • Jong-Sig, K
  • Frieze, P A
• Publication Date: 1992

Language

• English

Subject/Index Terms

• TRT Terms: Dynamic loads; Impact loads; Numerical analysis; Offshore structures
• Uncontrolled Terms: Dynamic response
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00703610
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM