PREDICTIONS AND MEASUREMENTS OF FULL SCALE MOTIONS, LOADS AND STRUCTURAL RESPONSE FOR CFAV QUEST

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Authors
  1. Stredulinsky, D.C.
  2. Pegg, N.G.
  3. Gilroy, L.E.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The paper describes the results of sea trials on CFAV QUEST which were undertaken for the purpose of evaluating advanced methods of sea load and structural response predictions. These methods are being used for improved rational assesments of structural integrity for design and condition based maintenance. Motion and hull pressure spectra were derived from measurements recorded on CFAV QUEST during various opertional conditions in moderate seas. The measurements are compared against predictions which were determined by combining regular wave transfer functions computed with PRECAL, a three-dimensional linear ship motion and load prediction code, with directional wave spectra collected with a wave uoy during the trial. Predictions of vertical bending moment spectra calculated in a similar manner are compared to bending moment spectra derived from measured strain spectra and full ship finite element analysis. Measured and predicted pressure and bending moment spectra show reasonable agreement, indicating the strong potential of using PRECAL in combination with structural finite element methods to predict structural response spectra for use in spectral fatigue analysis of ship hull structures.
Keywords
Computer programs (PRECAL);Structural response
Date of publication
01 Jun 1997
Number of Pages
12
DSTKIM No
98-00035
CANDIS No
506550
Format(s):
Hardcopy;Document Image stored on Optical Disk

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