Evaluation of SDRC Damping Analysis.

Abstract

Structural Dynamic Research Corporation (SDRC) obtained FM magnetic tape from Teledyne Engineering Services containing specified stress records from three Great Lakes vessels: M/V STEWART J. CORT, M/V ROGER BLOUGH, and S/S EDWARD L. RYERSON. Under USCG contract, SDRC was tasked to determine the damping value of the intervals from these records. The intervals chosen represented periods of springing aboard the vessels. To determine a relative 'feel' for the accuracy of the results obtained by SDRC, LT M. D. NOLL, U.S.C.G. Office of Research and Development, performed an evaluation which consisted of a manual calculation of damping and logarithmic decrement from associated quick-looks and a comparison of these with the results obtained by SDRC. Although the comparison does not show complete agreement, this evaluation does conclude that the SDRC analysis did provide reasonable values and may be valuable for future data reduction and analysis. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA087808

Entities

People

  • M. D. Noll

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Algorithms
  • Coast Guard
  • Curve Fitting
  • Eigenvalues
  • Engineering
  • Equations
  • Frequency
  • Frequency Response
  • Great Lakes
  • Magnetic Tape
  • Measurement
  • Modal Analysis
  • Power Spectra
  • Resonant Frequency
  • United States
  • United States Government
  • User Manuals

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  • Marine Hydrodynamics
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