NUBLINE, a system being used in preliminary design for generating a hull form with sufficient accuracy and fairness is described. The system defines a hull geometric form by using cubic nonuniform B-spline curves with multiple knots to represent the sectional lines and similarly to other input data, such as waterlines, buttock lines and boundary lines. An appropriate set of control vertices of the nonuniform B-spline which will fit these offsets can be determined by solving a set of simultaneous linear equations. The system includes a screen input data module, a parent hull form transformation module, an interaction design module (including a faring sub-module), a performance calculation module, a ship model manufacture drawing module, a post-process module and a hull form database module. The interaction design module provides a flexible means of designing and manipulating a set of shiplines, such as sectional lines, waterlines, buttock lines and other defined curves, using interactive graphics. It ensures that compatibility is maintained among section, waterline and buttock views. Curvature plots provide a powerful means of assessing the fairness of curves. In the fairing submodule a quick efficient nonuniform B-spline energy method is adopted. Over seventy hull forms with a bulbous bow or a bulbous stern or a transom stern or knuckle lines have been designed successfully using the system.

  • Supplemental Notes:
    • ICCAS 94, 8th Intl Conf on Computer Applications in Shipbuilding; 5-9 Sept 1994; Bremen, Germany. Sponsored by Bremer Vulkan Verbund AG and Kockums Computer Systems AB. Procs. Publ by Berry Rasmusson Reklam AB, Sweden, ISBN 91-630-2762-3. Vol 2, p 11.113 [12 p, 4 ref, 6 fig]
  • Authors:
    • Rong, H
    • Zhang, Wenfen
  • Publication Date: 1994


  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00710829
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM