Association Technique Maritime et Aéronautique

Numéro : 2211 - Year : 1993

Reliability criteria applied to the assessment of longitudinal strength of ship

A. CAMPANILE, Dipartimento di Ingegneria Navale, Universita "Federico II", Napoli
M. MANDARINO, Dipartimento di Ingegneria Navale, Universita "Federico II", Napoli

 

Summary. It is widely admitted that the reliability criteria give the possibility of a more rational approach to structural problems.

The exact and approximate probabilistic methods usually applied to structural problems have been firstly reviewed. Thereafter, a general definition of the safety index has been given, which can be applied to generically distributed variables without any space transformation {obviously except the usual transformation in the standard space).

As regards the longitudinal strength of ship, a general expression for the limit state has been considered and discussed in detail.

Finally, a method has been formulated to assess the actual value of the safety index according to the proposed formulation. A numerical application has been carried out and results have been discussed.

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