Detail Analysis of Ship Structures

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Authors
  1. Heath, D.
  2. Pegg, N.
  3. Dinovitzer, A.
  4. Walker, R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
This paper describes an improved approach to finite element modeling 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 cut-outs, which have-common 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 have been undertaken for these classes in advance to determine suitable finite element size distributions which are stored in a database and used to quickly generate the selected detail meshes when required. A relational object oriented global ship model is currently being developed from which users can graphically select a connection. The connection is checked against the predefined templates and the geometric parameters describing the detail are collected to direct the mesh development. Early use of this approach shows that it has the potential to reduce the overall time to produce a ship detail mesh from several days, using general-purpose finite element model generators, to under an hour. TRUNCATED
Keywords
Mesh refinement;Top-down;Computer programs (MAESTRO);DSA (Detail Stress Analysis);MAESTRO/DSA;Ship structures;Structural detail;Computer programs (MGDSA)
Report Number
DREA-SL-1999-031 — Paper
Date of publication
01 Jul 1999
Number of Pages
11
DSTKIM No
99-01505
CANDIS No
511555
Format(s):
Hardcopy;Document Image stored on Optical Disk

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