SHIP MOTIONS AND CAPSIZING IN ASTERN SEAS

An analytical and experimental study of ship motions and capsizing in extreme seas has been conducted. The analysis of linear and quasi-linear one-dimensional roll models has revealed motion anomalies not apparent from the usual linearized ship motion theory. Extensive tests have been conducted using two radio-controlled models in the wind generated seas of San Francisco Bay. Directional Spectra were computed, using a variety of techniques, from the wave measurements by an array of wave gages. Comparisons of the experimentally determined motions and a linear strip theory prediction are presented. A time domain numerical simulation program for motions and capsizing has been used to investigate motions in a variety of wave group configurations. The results show good agreement with observed capsizing phenomena and have revealed a number of important characteristics associated with large geometry changes in waves.

• Corporate Authors:

  University of California, Berkeley

  Institute of Transportation Studies Library
  Berkeley, CA  United States  94720
• Authors:
  • Chou, S J
  • Oakley Jr, O H
  • Paulling, J R
  • Van Slyke, R
  • Wood, P D
• Publication Date: 1974-12

Media Info

• Pagination: 341 p.

Subject/Index Terms

• TRT Terms: Capsizing; Rolling; Ship motion; Waves
• Old TRIS Terms: Roll amplitude; Wave effects
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00127444
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: USCG-D-103-75 Final Rpt.
• Contract Numbers: DOT-CG-84549-A
• Files: TRIS
• Created Date: Nov 18 1975 12:00AM