TOP-DOWN ANALYSIS OF SHIP HULL COMPONENTS

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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
A comparative structural analysis of a ship hull by top-down modelling is described. A finite element analysis of a loaded large coarse model of a ship hull was carried out. After the analysis a section of the model was extracted and displacements from the large model were applied to its boundary nodes as prescribed displacements. The extracted model was loaded with its portion of the load. The displacements and stresses obtained from a finite element analysis of the extracted model were compared with those at corresponding nodes of coarse model. A reduced size portion of the hull was extracted from the same region and the displacements and stresses compared with those of the coarse and extracted model. The reduced extracted model grid and loading were then refined and displacements and stresses obtained compared with those of the unrefined model. Then a portion of the refined model was extracted which contained a single frame and portions of the surrounding beams and plates. The displacements and stresses of this model again were compared with those of the model from which it was extracted. The stresses in the frame cross-section along its length are shown graphically.
Keywords
Top down analysis
Report Number
DREA-CR-94-411 — Contractor Report
Date of publication
31 Jan 1994
Number of Pages
43
DSTKIM No
94-05450
CANDIS No
144578
Format(s):
Hardcopy;Document Image stored on Optical Disk

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