A ship is lightly damped in roll motion, and bilge keels, antiroll fins and tanks are commonly employed to reduce rolling. This paper develops the hydrodynamic basis for the design and evaluation of roll stabilization devices. The topics considered include the present state-of-the-art for bilge keels, antiroll fins and antiroll tanks; the status of lateral motion prediction; specification of sea state for design and evaluation purposes; useful criteria and measures of effectiveness; the need for roll stabilization and type of device desired for specific ships and missions; design practice for sizing bilge keels and antiroll fins; role of simulation device design, and the validation of roll stabilization device installations. Attention is devoted to the results of ship trials, model experiments, and theoretical developments which have contributed to the present state of knowledge. Special emphasis is directed to the need for a combination of adequate bow design and antiroll fins to permit destroyers to maintain speed in a seaway. Detailed descriptions of necessary design and performance evaluation tools for predicting unstabilized roll motion, bilge keel and antiroll fin sizing, and fin controller characteristics are provided in appendixes.

  • Supplemental Notes:
    • Presented at the Annual Meeting, New York, New York, November 10-12, 1977
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Authors:
    • Cox, G G
    • Lloyd, A R
  • Publication Date: 1977

Media Info

  • Features: References;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00165443
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Files: TRIS
  • Created Date: Nov 23 1977 12:00AM