The generation of complex input data for computer analysis of structures has been significantly speeded up as the result of a new programme developed by LR. Known as LR 521--Interactive Graphics Generation and Checking System--it is five to 10 times faster than previous methods and is applicable to offshore platforms, bridges, buildings, dams, aircraft structures radio and television masts and towers. Its notable feature is its ability to generate essentially repetitive geometries step by step while allowing the user the full range of modifications at each stage. The Offshore Services group of the Society is now using it to speed up the computer structural analysis of the offshore platforms in steel and concrete, but it can equally well be used to generate two or three dimensional mathematical models for analysis of other types of structure containing similar or symmetrical parts. LR 521 runs on PDP11-45 mini computers with Vector General interactive displays attached. The output comprises a file of card images which can be adapted to the requirements of the user. This data is processed at LR on the Society's IBM 370/158 computer by a variety of analysis programmes, including the NASTRAN finite element package. LR 521 has been developed from LR SIGN, part of Lloyd's Register's system for the structural analysis of ships (LR SAFE). (No further information in article).

  • Corporate Authors:

    Lloyd's Register of Shipping

    71 Fenchurch Street
    London EC3M 4BS,   England 
  • Publication Date: 1976

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00170701
  • Record Type: Publication
  • Source Agency: Lloyd's Register of Shipping
  • Files: TRIS
  • Created Date: Mar 7 1978 12:00AM