IMPROVED SHIP DETAIL FINITE ELEMENT STRESS ANALYSIS

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Authors
  1. Pegg, N.G.
  2. Heath, D.
  3. Norwood, M.E.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
Abstract
The paper describes an improved approach to finite element modelling of ship structural details for design and in-service assessment. Specialized meshing algorithms have been developed which create finite element meshes of three-dimensional detail structure from predefined templates of the detail boundaries and associated meshing parameters. The ship structural details are divided into classes such as stiffener intersections, brackets, bulkhead-stiffener intersections or cutouts, which would have a common set of meshing parameters. Classes can be identified from lists of standard ship structural details produced by classification societies or for a specific ship type. Parametric stress analyses can be undertaken for these classes in advance to determine suitable meshing parameters which can be stored in a database and used to quickly generate the required detail meshes when required. The overall time to produce a ship detail mesh is reduced from several days using general purpose finite element model generators to a couple of hours. This improved detail meashing approach is being incorporated into an overall finite element based ship structural analysis program which uses global ship displacement results in a semi-automated top-down analysis of structural details. TRUNCATED
Keywords
Computer programs (MGDSA)
Date of publication
01 Sep 1998
Number of Pages
7
DSTKIM No
98-01463
CANDIS No
508296
Format(s):
Hardcopy;Document Image stored on Optical Disk

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