Accession Number:

ADA159804

Title:

Influence of Hull Form Parameters on Roll Motion.

Descriptive Note:

Final rept.,

Corporate Author:

DAVID W TAYLOR NAVAL SHIP RESEARCH AND DEVELOPMENT CENTER BETHESDA MD SHIP PERFORMANCE DEPT

Personal Author(s):

Report Date:

1985-04-01

Pagination or Media Count:

26.0

Abstract:

This report describes a statistical analysis of ship roll response as influenced by hull form parameters. A data base of 17 ships is described and regression analyses for the effect of hull form on roll angle are performed for three values of ship heading to wave direction and the maximum observed roll angle. Data for the ships that have antiroll fins are also presented. The present work describes an investigation into the feasibility of developing seakeeping performance estimates based on hull form parameters for roll motion in a manner analogous to Bales work for head seas. It has been shown that the dominant influence on roll response is metacentric height. It is not possible to provide guidance on parameters other than GM because change in these parameters can have positive or negative influence on roll motion depending on the value of GM. SInce it has been shown in a recent investigation for the Naval Studies Board, that adequately sized antiroll fins can reduce roll to the point where it is not the limiting motion, the recommended procedure for Navy combatants is to develop hull forms to reduce pitch and heave related responses and to provide adequate fins and bilge keels to reduce roll.

Subject Categories:

  • Statistics and Probability

Distribution Statement:

APPROVED FOR PUBLIC RELEASE