DYNAMIC AND STOCHASTIC ASPECTS IN THE STRUCTURAL ANALYSIS OF VLCC'S AND ULCC'S

The areas in which the problems arise in the analysis of the structures of VLCCs and ULCCs are presented. They are connected with dynamic loadings and include liquid motions, springing, fatigue, and finite element computations. Sea-loads estimates are briefly discussed, including absolute motions and accelerations, relative motions, shear forces, and bending moments, both in full load and ballast conditions. Speed reduction is considered for these estimates. The problem of springing for very large ships is presented and discussed, including a method of calculation and the composition of springing stresses with those resulting from dynamic quasistatic loads. Comparisons are made between calculations and recordings at sea. The complexity of the structures considered requires, for their anlysis, the use of techniques and schemes based on large computer programs, and the discussion covers the loads to be applied, statistical long term values and stress results interpretation.

• Corporate Authors:

  North East Coast Inst of Engineers & Shipbuilders

  Bolbec Hall, Westgate Road
  Newcastle upon Tyne,   England 
• Authors:
  • Planeix, J M
  • Huther, M
  • Latche, M
• Publication Date: 1974-5

Media Info

• Features: References;
• Pagination: p. 133-150
• Serial:
  • North East Coast Inst of Eng & Shipbuilders Trans
  • Volume: 90
  • Issue Number: 5
  • Publisher: North East Coast Inst of Engineers & Shipbuilders

Subject/Index Terms

• TRT Terms: Bending moments; Dynamic loads; Hulls; Hydrodynamics; Ship motion; Water waves
• Old TRIS Terms: Hull bending moments; Hull springing; Hull wave interaction; Wave force analysis
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Materials;

Filing Info

• Accession Number: 00057787
• Record Type: Publication
• Source Agency: Engineering Index
• Files: TRIS
• Created Date: Oct 22 1974 12:00AM