Direct Linkage of the VAST Finite Element Code to the DSA Database


  1. Jiang, L.
  2. Norwood, M.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
The general-purpose finite element code VAST, which was developed and maintained by Martec Limited over the past three decades under sponsorship from DRDC Atlantic, has been adopted as the finite element solver engine in several ship structural analysis programs, including the STRUC code developed at DRDC Atlantic. The execution of the VAST program required a set of ASCII input data files and the calculated element stresses were stored in a binary file, named Prefix.V53. In order to assist model generation and stress post-processing, a GUI system, named Trident FEA, has been developed by Martec Limited based on the DSA database. Because a direct linkage between the VAST program and the DSA database was not yet established, all the VAST input data files must be created by Trident or STRUC using information stored in the DSA database and the stress results generated by VAST must be transferred back to the DSA database for plotting. These I/O-intensive, time-consuming operations had to be carried out in an interactive mode, causing a serious efficiency problem for large finite element models with many load cases. In this contract, a direct linkage of the VAST program to the DSA database was developed. This direct VAST-DSA link provided not only a pre-processing capability for extracting all input information required for VAST executions directly from the DSA database files, but also a post-processing capability to automatically write computed element stresses and element interna

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finite element analysis;ship structural response;structural stress;DSA database;VAST finite element code
Report Number
DRDC-ATLANTIC-CR-2006-185;MARTEC-TR-0603 — Contractor Report
Date of publication
01 Sep 2006
Number of Pages

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