Abstract
Robust Design Optimization (RDO) represents a really interesting opportunity when the specifications of
the design are careful and accurate: the possibility to optimize an industrial object for the real usage
situation, improving the overall performances while reducing the risk of occurrence of off-design con-
ditions, strictly depends on the availability of the information about the probability of occurrence of the
various operative conditions during the lifetime of the design. Those data are typically not available prior
than the production of a prototype.
However, once the design has been produced and is operative, navigation data can be collected and
utilized for the modification (refitting) of the current design, possibly in an early stage of its lifetime, in
order to adapt the design to the real operative conditions at a time when the lifetime is still long enough
to allow the payback of the cost of the modification by the obtained savings.
In the present paper, five sister ships have been observed for a time period of two months, recording
their operative data. Statistical distribution of speed and displacement are derived. An optimization
framework is then applied, and some modifications of a small portion of the hull are proposed in order to
increase significantly the performances of the hull, decreasing the operative cost of the ship. Dedicated
numerical techniques are adopted in order to reduce the time required for the re-design activities.
Anno
2016
Autori IAC
Tipo pubblicazione
Altri Autori
Daniele Peri
Editore
Pergamon Press.
Rivista
Ocean engineering