THE USE OF SYSTEM IDENTIFICATION TECHNIQUES TO MEASURE THE SHIP RESISTANCE, POWERING AND MANEUVERING COEFFICIENTS OF THE EXXON PHILADELPHIA AND A SUBMARINE FROM SIMPLE TRIALS DURING A ROUTINE VOYAGE

It is shown that the various methods of correcting for "scale effect" after measuring hydrodynamic coefficients on the ship model are no longer a reliable technique for predicting ship performance. Likewise, for predicting ship resistance, all methods of extrapolation from model to full-scale tests use the same unsatisfactory techniques, such as subtracting the flat plate frictional resistance coefficient from the measured model resistance at low Froude numbers to obtain the eddy resistance coefficient. Using system identification techniques developed at MIT, a new method for accurately measuring the resistance, powering, and maneuvering coefficients of a ship from simple trials is presented. This method is applied to the sea trials of the tanker EXXON PHILADELPHIA and a submarine. Comparison of numerical and experimental results indicates the accuracy of the system identification technique over previous methods in computing for the hydrodynamic coefficients.

  • Supplemental Notes:
    • Conference paper
  • Authors:
    • Abkowitz, M A
  • Conference:
  • Publication Date: 0

Media Info

  • Features: References;
  • Pagination: 14p.

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Filing Info

  • Accession Number: 00660861
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM