INTERACTIVE SURFACE ADJUSTMENT OF MARINE PROPELLERS

A generalized interactive method is presented for the adjustment of any selected subregions on a propeller surface before its manufacture by an NC (numerically controlled) machining process. The adjustment computer program is flexible and can produce a smooth approximately slope-continuous surface. The adjustment is made by first rectifying, normalizing and transforming the defined subregion into a unit circle in the plane view. If this region is then regarded as the plan view of a thin, plane elastic plate, the shape of the plate when displaced laterally at any selected point can be computed by Foeppl's or Michell's solution for such a case. This "influence surface" may then be superimposed on the shape of the original surface (transformed within the unit circle) to change its shape. The process is iterative and retentive of all data; it may be monitored on a computer graphics terminal while successive modifications proceed under full control towards a desired form of the propeller blade or hub surface.

  • Availability:
  • Corporate Authors:

    IPC Science and Technology Press Limited

    IPC House, 32 High Street
    Guildford, Surrey  England 
  • Authors:
    • Vickers, G W
    • Duncan, J P
    • Lee, V
  • Publication Date: 1978-11

Media Info

  • Features: References;
  • Pagination: p. 375-379
  • Serial:
    • Computer Aided Design
    • Volume: 10
    • Issue Number: 6
    • Publisher: Butterworth Scientific Limited
    • ISSN: 0010-4485

Subject/Index Terms

Filing Info

  • Accession Number: 00189450
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Apr 25 1979 12:00AM