TRAJECTORY PREDICTIONS FOR SHIPS ENGAGED IN CLOSE PROXIMITY OPERATIONS

The necessity for attention in the area of ship operations in close proximity is outlined and followed by a review of previously accomplished work in this field. The importance of interaction forces is continually reemphasized by both experimental, theoretical and actual experience. Assuming the applicability of potential theory, a theoretical model for the operation of two ships in close proximity is developed and, using various extensions of Lagally's theorem, forces and moments including their unsteady components are derived. These are then used in the applicable equations of ship motion in the horizontal plane expanded to the third-order non-linear terms in order to arrive at a method for prediction of the trajectories of each of the ships engaged in the operations. The principal result is a computerized model which is capable of predicting these trajectories. Several simulations are run and the results recorded in order to demonstrate the use and versatility of the model.

  • Corporate Authors:

    Massachusetts Institute of Technology

    Marine Resources Information Center
    Cambridge, MA  USA  02139
  • Authors:
    • Ashe, G M
  • Publication Date: 1975-5

Subject/Index Terms

Filing Info

  • Accession Number: 00126020
  • Record Type: Publication
  • Source Agency: Massachusetts Institute of Technology
  • Report/Paper Numbers: MS Thesis
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM