Topics on Boundary-Element Solutions of Wave Radiation-Diffraction Problems

Abstract

Two topics on the numerical solution of boundary-integral equations arising in linear wave-body interactions are discussed. The properties of a spectral technique for the solution of the integral equation are analyzed and compared to the conventional collocation method. It is shown that, using this technique, hydrodynamic forces predicted by the source-distribution method are identical to those obtained from the direct solution for the velocity potential. The second part of the paper investigates the numerical properties of a method which removes the effects of the irregular frequencies for bodies of general shape at a small computational and algorithmic overhead. Its performance is illustrated in the evaluation of the heave and sway hydrodynamic coefficients of a circle and a rectangle. Keywords: Galerlain method; charts.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1985
Accession Number
ADA161699

Entities

People

  • Chang-ho Lee
  • Paul D. Sclavounos

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Waves
  • Acoustics
  • Bodies
  • Boundaries
  • Boundary Value Problems
  • Computations
  • Computer Programs
  • Computers
  • Diffraction
  • Equations
  • Frequency
  • Frequency Bands
  • Galerkin Method
  • Integral Equations
  • Linear Systems
  • Three Dimensional
  • Waves

Fields of Study

  • Mathematics

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Marine Hydrodynamics