Validation of ShipMo3D Version 3.0 User Applications for Simulation of Ship Motions

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Authors
  1. McTaggart, K.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
ShipMo3D is an object-oriented library with associated user applications for predicting ship motions in calm water and in waves. This report describes the validation of ShipMo3D Version 3.0 user applications with data from model tests and full-scale trials. Version 3.0 of ShipMo3D introduces new capabilities for modelling U-tube tanks and sloshing for tanks with free surfaces. Seakeeping predictions have been validated for frigates and destroyers using data from model tests and sea trials. Predicted RMS motions in random seas are typically within 10 to 30 percent of measured values, with heave motions being the most accurate and roll motions being the least accurate. For the tanker Esso Osaka performing turning circle maneuvers, predicted turning circle parameters (tactical diameter, and speed and yaw rate at 1500 s), are within 18 percent of measured values from sea trials. Validation of sloshing predictions has been performed using data for a barge model with two sloshing tanks. In the absence of validation data, verification studies have been performed for seakeeping for vessels with azimuthing propellers and U-tube tanks.

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Keywords
frequency domain;maneuvering;seakeeping;ship motions;simulation;time domain;validation;waves
Report Number
DRDC-ATLANTIC-TM-2011-306 — Technical Memorandum
Date of publication
01 Jan 2012
Number of Pages
172
DSTKIM No
CA046345
CANDIS No
806733
Format(s):
Electronic Document(PDF)

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