AN INVESTIGATION OF MIDSHIP BENDING MOMENTS EXPERIENCED IN EXTREME REGULAR WAVES BY MODELS OF THE MARINER TYPE SHIP AND THREE VARIANTS
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 (h/lambda = 1/7). 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.
Stevens Institute of TechnologyDavidson Laboratory, Castle Point Station
Hoboken, NJ United States 07030
Ship Structure CommitteeNational Academy of Science, 2101 Constitution Avenue, NW
Washington, DC United States 20418
- Dalzell, J F
- Publication Date: 1964-1-15
- Features: References;
- Pagination: 56 p.
- TRT Terms: Bending moments; Bending stress; Flexural strength; Hulls; Ship motion; Ships; Wave height; Waves
- Identifier Terms: Ship Structure Committee
- Old TRIS Terms: Design waves; Hull bending moments; Regular waves; Ship response
- Subject Areas: Design; Marine Transportation; Vehicles and Equipment;
- Accession Number: 00331934
- Record Type: Publication
- Source Agency: Ship Structure Committee
- Report/Paper Numbers: SSC-155 Prog Rpt.
- Contract Numbers: NObs-78211
- Files: TRIS
- Created Date: May 21 1981 12:00AM