EXPERIMENTAL AND THEORETICAL EVALUATION OF SPRINGING ON A GREAT LAKES BULK CARRIER

Experiments were carried out on a model of the Great Lakes bulk carrier, Stewart J. Cort, jointed amidships, with four different connecting beams. These beams provided different degrees of stiffness and hence of natural frequency of vertical hull vibration. Springing was simulated in short regular waves generated in a model tank at various resonant combinations of model speed and wave length. At equal speeds the effect of increasing stiffness was found to be a decrease in the magnitude of springing at resonance when expressed as bending moment relative to wave slope. Parallel theoretical calculations were carried out which were found to be extremely sensitive to the level of damping introduced. Good agreement was obtained between trends of theory and experiment. If appropriate assumptions were made regarding damping, good agreement was also obtained in magnitudes of springing bending moments. (Author)

• Corporate Authors:

  Webb Institute of Naval Architecture

  Glen Cove, NY  United States 
• Authors:
  • Hoffman, D
  • Van Hooff, R W
• Publication Date: 1973-7

Media Info

• Pagination: 93 p.

Subject/Index Terms

• TRT Terms: Bending; Hulls; Vibration
• Old TRIS Terms: Hull bending; Hull springing; Hull stiffness
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00057213
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt.
• Contract Numbers: DOT-CG-23,027-A
• Files: TRIS
• Created Date: Aug 16 1974 12:00AM