FORWARD SPEED EFFECT ON LATERAL STABILITY DERIVATIVES OF A SHIP

Abstract

By use of Green's function, the problem of a thin surface ship moving at a constant forward speed and a small lateral speed (side slip or yaw) is formulated, leading to an integral equation for the doublet distribution. An iterative perturbation technique, based on the asymptotic expansion of the kernel function, is developed for the solution of the equation and is found very rapidly convergent. Lateral stability derivatives of a representative ship are evaluated and a strong Froude number dependence is detected. Comparison of the increase in lateral stability derivatives due to an increase of Froude number obtained from the theory with the available experimental result indicates good agreement. Qualitative analysis of the speed effect on the lateral stability indices and the steady-state turning radius is also made. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1961
Accession Number
AD0267103

Entities

People

  • Pung Nien Hu

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Agreements
  • Asymptotic Series
  • Equations
  • Froude Number
  • Integral Equations
  • Integrals
  • Kernel Functions
  • Mathematical Analysis
  • Mathematics
  • Perturbations
  • Steady State

Fields of Study

  • Mathematics

Readers

  • Aerodynamics/Aeronautics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Marine Hydrodynamics