Accession Number : AD0432278


Title :   An Investigation of Midship Bending Moments Experineced in Extreme Regular Waves by Models of the Mariner Type Ship and Three Variants


Descriptive Note : Progress rept. no. 1


Corporate Author : STEVENS INST OF TECH HOBOKEN NJ


Personal Author(s) : Dalzell, J F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/432278.pdf


Report Date : 15 Jan 1964


Pagination or Media Count : 65


Abstract : This report summarizes experimental research to investigate the possibility of a physical upper limit on midship bending moments in the Mariner-type ship being reached in regular waves of height significantly less than the theoretical upper limit of stability for progressive waves. The experiments included variation of distribution of loading and of freeboard as model parameters. Each variation was tested at various speeds in regular head and following waves of several different lengths and of a wide range of heights. No significant upper limit of bending moment was found. However, the study establishes more firmly the grossly linear dependence of midship bending moment on wave height, even for extreme wave heights which may be encountered in service. These findings strengthened the case for determining design wave bending moments on the basis of statistical analyses of ocean waves and/or resulting bending moments.


Descriptors :   *BENDING MOMENTS , *SHIP HULLS , HYDRODYNAMICS , LOADS(FORCES) , MOMENTS , MOTION , OCEAN WAVES , PHYSICAL PROPERTIES , SHIP MODELS , STABILITY , STATISTICAL ANALYSIS , VELOCITY


Subject Categories : Marine Engineering
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE