PRELIMINARY ANALYSIS OF BENDING-MOMENT DATA FROM SHIPS AT SEA.

Data playback, manual reduction and analysis techniques, and the automatic system to be used for future analysis are presented. Examples are given of some forms of longterm trends. Useful data were obtained on over 85% of voyages representing three ship-years of operation of a C-4 dry cargo vessel o...

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Bibliographic Details
Main Authors: Fritch,D. J., Bailey,F. C., Wise,N. S.
Other Authors: LESSELLS AND ASSOCIATES INC BOSTON MASS
Format: Text
Language:English
Published: 1963
Subjects:
STRESSES
SHIPS
CARGO SHIPS
DATA PROCESSING
ATLANTIC OCEAN
OCEAN WAVES
PRESSURE
MATHEMATICAL MODELS
STATISTICAL ANALYSIS
MATHEMATICAL PREDICTION
TABLES(DATA)
Psi
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/AD0436877
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0436877
Description
Summary:Data playback, manual reduction and analysis techniques, and the automatic system to be used for future analysis are presented. Examples are given of some forms of longterm trends. Useful data were obtained on over 85% of voyages representing three ship-years of operation of a C-4 dry cargo vessel on North Atlantic trade routes. Two complete voyages were analyzed using manual techniques; the results of this analysis are given. The maximum observed peak-to-peak variation of wave-induced stress was 8300 psi which occurred during a Beaufort 11-12 Sea. A prediction based on the limited amount of longterm data available from the two analyzed voyages yielded an extreme value of 10,290 psi for a year of operation of this ship type on North Atlantic route. Stress variations on the order of 9,000 psi were observed during the dry docking of the two instrumented ships. (Author) Report on Ship Response Statistics.

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