The Authors (of Swan Hunter Shipbuilders Ltd. and B.S.R.A. respectively) describe an investigation of way-end pressure loads and local stress responses during the launch of a 30,000-dwt products tanker. The investigation was carried out because the preliminary calculations indicated extremely high way-end pressures. To alleviate these high pressures two extra ways were introduced under the hull's two longitudinal bulkheads over the after half of the existing launch ways. Various other precautions, including additional panel stiffening within the hull, were also taken to prevent structural damage. Measurements of load and strain were made at a number of points on the ship's bottom during both static tests and launching, and the results compared with the loads and structural responses predicted by the use of grillage and finite-element techniques. The static tests indicated that the stiffening arrangement adopted was adequate to withstand the expected pressure loading. A procedure, using both grillage and finite-element analysis, is suggested to enable naval architects to assess the response of a structure when subjected to way-end pressure during launching.

  • Availability:
  • Corporate Authors:

    Royal Institution of Naval Architects

    10 Upper Belgrave Street
    ,   United States 
  • Authors:
    • Smith, G K
    • Vardon, J R
  • Publication Date: 1977-9

Media Info

  • Features: References;
  • Pagination: 21 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179203
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Aug 19 1978 12:00AM