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

Abstract

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)

Document Details

Document Type
Technical Report
Publication Date
Dec 27, 1963
Accession Number
AD0436877

Entities

People

  • D. J. Fritch
  • F. C. Bailey
  • N. S. Wise

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Automatic
  • Bending Moments
  • Computing-Related Activities
  • Data Science
  • Information Science
  • Interdisciplinary Science
  • Mathematical Analysis
  • Mathematics
  • Plastic Explosives
  • Playback
  • Statistical Analysis
  • Statistics

Readers

  • Marine Hydrodynamics
  • Mechanical Engineering/Mechanics of Materials.
  • Oceanography.