ANALYSIS OF THE INTERACTION FORCE BETWEEN SHIP HULL AND TANK FOR THE HITACHI ZOSEN-CBI SPHERICAL TANK LNG CARRIER

The Hitachi Zosen-CBI spherical tank LNG carriers features its sliding-type tank-supporting structure consisting of keys and keyways. This support system prevents the occurrence of thermal stresses by allowing the tank's deformation in radial directions, whereas interaction force between the hull and tank would work as concentrated load. In designing such a structure, therefore, the interaction force should be accurately estimated and a design that distributes the interaction force evenly among the keys must be given. Tanks installed on a ship are subjected not only to static loads but also to various wave-induced dynamic loads, and the interaction force resulting from the latter is generally estimated through a statistical analysis procedure. This paper describes the square root method and total system analysis, compares the interaction force analysis results obtained by these procedures on a 130,000 cubic meter LNG carrier, and concludes that the square root method considerably overestimates the interaction force.

  • Corporate Authors:

    Hitachi Zonsen Company Limited, Technical Inst

    60, Sakurajima Kitanomachi, Konohanaku
    Osaka,   Japan 
  • Authors:
    • Harada, K
    • Tateishi, M
    • Ikeda, J
  • Publication Date: 1978-6

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Filing Info

  • Accession Number: 00190437
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Mar 28 1979 12:00AM