The Author, Head of Hull Structures, Lloyd's Register of Shipping, discusses his Society's Rules and formulae for determining the scantlings of ro-ro ships. The design of these ships introduces problems for which some of the simple empirical formulae given in the LR Rules for conventional cargo-ship types have to be supplemented by additional calculations having a more rigorous scientific basis. For this purpose, the Society has developed a whole range of computer-based facilities which enables such complex calculations to be performed economically and efficiently. The available facilities are collected under the generic term L.R.-PASS (Plan Appraisal System for Ships). Its two principal components are L.R.-SAFE (Structural Analysis by Finite Element) and L.R.-SEAS (Ship Environment Analysis System), whose use for ro-ro ships is explained by the Author in the present paper. Under Structural Assessment, he discusses longitudinal strength, access openings, transverse strength, cargo decks, structural details, and rudders. Under Design Assessment, he describes studies undertaken to ensure satisfactory sea-keeping qualities for two new ro-ro ferries for Tor Line, and the absence of excessive vibration in the turbo-electric ship Seaway Prince. In his final remarks, the Author emphasizes the importance of good structural-detail design in ro-ro ships because of the concentrated nature of the loads to which many parts of the structure are subjected.

  • Availability:
  • Corporate Authors:

    Wyt & Zonen B.V.

    Pieter de Hoochweg 111
    Rotterdam,   Netherlands 
  • Authors:
    • Mathewson, J I
  • Publication Date: 1976-10

Media Info

  • Pagination: 8 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00157840
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 15 1977 12:00AM