THE EFFECT OF SPECTRAL FORMATION AND SWELL ON SHIP RESPONSES USING A COMPUTER AIDED METHOD TO DETERMINE SEAWAY STATISTICS

A review of the background and current literature for deep ocean wave spectrum energy-density formulations is presented. An evaluation of how the choice of spectral formulation may affect the ship responses over the range of sea states observed in the North Atlantic (data taken from Hogben & Lumb) for a particular shipping route (Rotterdam to New York) was made. The choice of spectral formulation does not appear to significantly change the results. A method of including swell in the sea spectrum is presented. The swell contribution is made for a particular frequency and direction range of the energy in the spectrum based on the significant wave height and period of the swell at a decay distance, D, from its source. A computer program for calculating seaway statistics and ship responses over an arbitrary shipping is presented in the Appendix.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Ocean Engineering, 77 Massachusetts Avenue
  Cambridge, MA  United States  02139
• Authors:
  • Oakes, M C
• Publication Date: 1974-6

Subject/Index Terms

• TRT Terms: Computer programs; Electromagnetic spectrum; Hydrodynamics; Measurement; Ocean waves; Ship motion; Water waves; Wave measurement
• Old TRIS Terms: Sea loads; Sea waves
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00057479
• Record Type: Publication
• Source Agency: Massachusetts Institute of Technology
• Report/Paper Numbers: MS Thesis
• Files: TRIS
• Created Date: Oct 22 1974 12:00AM