Validation of SHIPMO7 and PRECAL with a Warship Model.

Abstract

This technical memorandum describes a validation study of SHIPMO7 and PRECAL, two frequency domain codes for predicting ship motions and sea loads in waves. SHIPMO7 is a strip theory code while PRECAL is a three-dimensional panel code. Results from the two codes are compared with non-proprietary experimental data for a warship model. In general, SHIPMO7 gives good agreement with motions and sea loads, while PRECAL is slightly inferior. The consistently better results for SHIPMO7 in the lateral plane are likely due to its careful treatment of appendage and viscous forces. Neglecting rudder autopilot motions does not appear to influence significantly predictions from either code. A proposed approximate method for predicting sectional gyradii leads to satisfactory predictions of torsional moment.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1996
Accession Number
ADA329156

Entities

People

  • Dann L. Chow
  • Kevin A. Mctaggart

Organizations

  • Defence Research and Development Canada

Tags

DTIC Thesaurus Topics

  • Agreements
  • Automatic Pilots
  • Bending Moments
  • Center Of Gravity
  • Classification
  • Experimental Data
  • Frequency
  • Froude Number
  • Hulls (Marine)
  • Metacentric Height
  • Naval Architecture
  • Resonant Frequency
  • Seakeeping
  • Security
  • Ship Hulls
  • Ship Motion
  • Three Dimensional

Readers

  • Computational Fluid Dynamics (CFD)
  • Marine Hydrodynamics