CROSS CURVES OF STABILITY COMPUTER PROGRAM MB006

A computer program is described which uses hull offsets to determine righting arms for a heeled ship. Areas and moments are calculated using straight line and circular segment approximations for as many as twenty five stations and fourteen segments per station. Longitudinal integration is accomplished using a Simpsons Rule integration algorithm which is independent of station spacing. Data for plotting cross curves is normally generated at angles from five to ninety degrees and in increments of five degrees for a range of twenty displacements. To aid in the stability analysis for small vessels, the righting arms may be corrected for center of gravity and interpolated for appropriate displacement. The area under the curve thus represented can be determined up to and between two specified angles of heel. The angle of maximum GZ is located. The program is written in Fortran 4 and requires a memory of about 28,000 words.

• Corporate Authors:

  Maritime Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Seibold, F
• Publication Date: 1972-1

Media Info

• Pagination: 95 p.

Subject/Index Terms

• TRT Terms: Engineering moments; Heeling; Ship motion; Stability analysis
• Old TRIS Terms: Heeling moments; Righting moments
• Subject Areas: Design; Marine Transportation;

Filing Info

• Accession Number: 00032737
• Record Type: Publication
• Source Agency: Maritime Administration
• Files: TRIS, USDOT
• Created Date: Apr 21 1973 12:00AM