A ship navigating heavy seas is subjected to wave impacts on its forward and bottom sections. These loads induce a transient vibratory response in the hull, which behaves like a free beam interacting with the water. This article presents a method for predicting the slamming load, using strip theory to determine relative motion between the ship and waves, and the rate of change in the momentum of the fluid to calculate the impact force. The hydrodynamic coefficients are calculated with two-dimensional singularity functions. Hull vibratory response is modeled with two- dimensional Timoshenko beam finite elements with a consistent mass formulation used to determine mode shapes and natural frequencies. The response is obtained using a Newmark integration scheme. Lastly, sample calculations for a cargo ship are presented.

  • Availability:
  • Supplemental Notes:
    • Journal article
  • Authors:
    • Soares, C G
  • Publication Date: 1989-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00658221
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM