A SIMPLIFICATION OF THE FAIRING PROCESS IN SHIP DESIGN WHICH PROVIDES AN ACCURATE PRODUCT MODEL

The paper sets the environment for the introduction of a CAD/CAM system in a modern shipyard and briefly discusses the requirements of the selected system. In particular, the paper focuses on the demand for high precision accuracy of the geometry model which is to be used as the basis for the detailed steelwork design and definition. The paper states the traditional cross-fairing approach, with reference to both wire-frame (BLINES) and surface (HULLSURF) technologies. A development using a limited number of general surface curves, some of which have associated angles, is then described. The ability to fair a small, well defined data set leads to the ability to expedite the fairing process and results in the availability of a pseudo-surface definition which transfers quickly, and in a semi-automatic manner, to a true surface definition. The paper gives illustrated applications of the developed software in a practical environment. Regions of the surface can be classified by their curvature characteristics; this depends on the distribution of the surface curves and the associated angle curves which therefore have a subsequent impact on the interactive definition of the shell plating and the structural detailing. Reference is also made in the paper to liaison in the fields of steelwork design and production with Hitachi Zosen Information Systems Ltd., and the development of software towards a total integrated CAD/CAM/CAE/CAP capability using a common hardware platform.

• Supplemental Notes:
  • PRADS '92, 5th Intl Symp on the Practical Design of Ships and Mobile Units; 17-22 May 1992; Newcastle upon Tyne, U.K. Pprs. Publ by Elsevier Science Pubs Ltd., U.K., Vol 2, p 2.1311 [17 p, 12 ref, 8 fig]
• Authors:
  • Catley, D
  • Ives-Smith, A
• Publication Date: 1992

Language

• English

Subject/Index Terms

• TRT Terms: Computer aided design; Computer aided manufacturing; Fairing lines; Naval architecture; Vehicle design
• Uncontrolled Terms: Ship design
• Old TRIS Terms: Lines fairing
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00703439
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM