CONTRIBUTIONS TO THE RATIONAL CALCULATION OF SHIP OSCILLATORY MOTIONS IN A SEAWAY

This is an abridged version of a paper presented at a Schiffbautechnische Gesellschaft meeting in Helsinki in June 1976. In the introduction, the Author includes a "family tree" of those who have contributed to the theory of this subject in the past, and stresses the importance of the choice of a simple and inexpensive method for calculating ship motions in a seaway. The method of calculation is then discussed under the headings: 2. General Equations of Motion (Transfer Functions in Regular Waves--Impulse Transfer Functions--Oscillations in Irregular Waves--Frequency Transformation of the Spectra--Summary of the Equations of Motion). 3. The Determination of the Hydrodynamic Forces (Forces in Still Water--Excitation Forces-Strip Methods--Non-Linear Forces). 4. Can the Problem be Simplified? (Separation of the Equations of Motion (into Two Groups)--Long or Shorted Crested Sea?--Final Remarks). In his final remarks, the Author states that excessive simplification of the equations of motion can lead to a faulty assessment of ship behavior in a seaway; for an economical calculation of ship oscillations, the hydrodynamic coefficients should be determined in the most rational way possible, and the development of reliable approximation methods is therefore extremely desirable.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0036603X
• Corporate Authors:

  Seahafen-Verlag Erik Blumenfeld

  Celsiusueg 15, Box 1347
  2 Hamburg 50,   Germany 

  Seehafen-Verlag Erik Blumenfeld

  Celsiusweg 15, Postfach 1347
  2000 Hamburg 50,   Germany 
• Authors:
  • HONKANEN, M
• Publication Date: 1976-7

Language

• German

Media Info

• Pagination: 3 p.
• Serial:
  • Schiff und Hafen
  • Volume: 28
  • ISSN: 0036-603X

Subject/Index Terms

• TRT Terms: Electromagnetic spectrum; Ship motion; Waves
• Old TRIS Terms: Irregular waves; Regular waves; Ship response
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00148521
• Record Type: Publication
• Source Agency: British Ship Research Association
• Files: TRIS
• Created Date: Feb 23 1977 12:00AM