A Procedure for Assessing the Structure of the CPF Considering the Loss of Strength Due to Corrosion

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Authors
  1. Smith, D.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Smith (D R), Halifax NS (CAN)
Abstract
The report describes the effect of possible corrosion of the hull plating and stiffeners on the structural strength of the Canadian Patrol Frigate in deep departure hogging and light operational sagging conditions. Balance on an eight meter wave was the sea state loading case considered. A MAESTRO analysis was carried out to obtain the initial structural strength, then the effects of corrosion were assessed. To model corrosion, areas of plating and the attached stiffeners were reduced in cross-section and modelled in detail. After each reduction, the structure was analysed using the finite element analysis program, VAST, to determine the effect on strength when applying the boundary conditions and loading from the MAESTRO analysis. The adequacy parameters and stresses with and without corrosion are presented in graphical form as a measure of the hull strength.
Keywords
Ship structures;Structural response;Computer programs (MAESTRO);Sea loads;Ultimate strength;Structural analysis;Adequacy parameter;PLating;Stiffeners
Report Number
DREA-CR-1999-111 — Contractor Report
Date of publication
01 Apr 1999
Number of Pages
134
DSTKIM No
CA001178
CANDIS No
513041
Format(s):
Hardcopy;Document Image stored on Optical Disk

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