engleski

Structure Design of Bilobe Cargo Tanks in Liquefied Gas Carriers

Different types of cargo tanks for gas sea-transport by Liquefied Gas Carriers are de-scribed. Design of bilobe tanks, as a complex task, according the Classification Rules is analysed. This includes selection of special material for high pressure and low tempera-ture, determination of internal pressure consisting of design vapour pressure and liquid pressure that depends on ship motion in rough sea. It furthermore calculation of tank scantlings, i.e. shell thickness, and structure design of longitudinal bulkheads, swash bulk-heads, vacuum rings and stiffening rings. Stability of cylindrical shells, spherical dished ends and vacuum rings is checked. Special attention is paid to the FEM analysis of the stiffening rings. Some comments on the USCG Requirements are given. Also, some facts concerning tank design for production are pointed out.

structure design; bilobe tanks; ship motion; design loads

Rad je kao predavanje prezentiran na skupu International Conference on Marine Research and Transportation, održanom od 19.-21.09.2005., Ischia, Italija.