Accession Number:

ADA162569

Title:

Analysis and Assessment of Major Uncertainties Associated with Ship Hull Ultimate Failure.

Descriptive Note:

Final rept. for period ending Jun 83,

Corporate Author:

HYDROMECHANICS INC PLAINVIEW NY

Report Date:

1984-01-01

Pagination or Media Count:

104.0

Abstract:

The different uncertainties associated with ship longitudinal strength and external loading are reviewed when considering probabilistic analysis and design. The uncertainties are represented in the form of coefficients of variation, where that information can then be used in evaluation of the safety index andor related quantities used for determination of structural failure probability. The emphasis is directed toward longitudinal strength, with the failure mode due to ultimate compression failure as the major consideration. Numerical values for coefficients of variation are found by data analysis and computation for different types of loads wave-induced, springing, slamming, etc. together with suggested means of determining the uncertainty for the combined loads acting on a ship. Methods for determining ship strength uncertainties are examined, with application to modern commercial ships illustrating the important prospective failure mechanisms and the limits of present mathematical models in predicting such failures. Proposed procedures for determining uncertainties for such ship structures by use of computationally efficient numerical computer programs are described. Keywords Probabilistic design Ship longitudinal strength Load variability and Hull girder failure.

Subject Categories:

  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE