EFFECTS OF SHALLOW WATER ON SHIP MOTION PARAMETERS IN PITCH AND HEAVE

A Mariner class ship model was tested at various shallow water depths and Froude Numbers constrained to motion in one degree of freedom, either pitch-no heave or heave-no pitch. Under these constraints, using a step response technique, the response of the model to a step disturbance in pitch or heave was recorded. This response was then analyzed to obtain virtual mass or virtual inertia and damping coefficients in heave and pitch. These results are presented to show the effects of shallow water on these ship motion parameters at various Froude Numbers as a function of frequency of oscillation.

• Corporate Authors:

  Massachusetts Institute of Technology

  Department of Naval Architecture and Marine Engineering
  Cambridge, MA  United States  02139
• Authors:
  • Freakes, W
  • Keay, K L
• Publication Date: 1966-8

Media Info

• Pagination: 120 p.

Subject/Index Terms

• TRT Terms: Amplitude (Physics); Navigation; Pitch (Dynamics); Ship motion
• Uncontrolled Terms: Heaving
• Old TRIS Terms: Heave amplitude; Shallow water effects
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00027052
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: 66-7, DSR-6026
• Contract Numbers: MA-2710
• Files: TRIS
• Created Date: Mar 2 1973 12:00AM