@prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . @prefix prodotto: . unitaDiPersonaleInterno:MATRICOLA40457 pubblicazioni:autoreCNRDi prodotto:ID308707 . @prefix prodottidellaricerca: . @prefix modulo: . modulo:ID8609 prodottidellaricerca:prodotto prodotto:ID308707 . modulo:ID8614 prodottidellaricerca:prodotto prodotto:ID308707 . unitaDiPersonaleInterno:MATRICOLA40474 pubblicazioni:autoreCNRDi prodotto:ID308707 . unitaDiPersonaleInterno:MATRICOLA40535 pubblicazioni:autoreCNRDi prodotto:ID308707 . @prefix rdf: . prodotto:ID308707 rdf:type prodotto:TIPO1301 . @prefix retescientifica: . prodotto:ID308707 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID308707 rdfs:label "Violent seakeeping tests of a fast catamaran (Contributo in atti di convegno)"@en . @prefix xsd: . prodotto:ID308707 pubblicazioni:anno "2011-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID308707 skos:altLabel "
Benjamin Bouscasse, Claudio Lugni, Riccardo Broglia (2011)
Violent seakeeping tests of a fast catamaran
in 14th Numerical Towing Tank Symposium, NuTTS14, University of Southampton, Poole, England, 22nd-24th October 2011
"^^rdf:HTML ; pubblicazioni:autori "Benjamin Bouscasse, Claudio Lugni, Riccardo Broglia"^^xsd:string ; pubblicazioni:paginaInizio "19"^^xsd:string ; pubblicazioni:paginaFine "24"^^xsd:string ; pubblicazioni:url "http://eprints.soton.ac.uk/207777/1.hasCoversheetVersion/Final_14thnutts_rpoceedings.pdf"^^xsd:string ; pubblicazioni:pagineTotali "6"^^xsd:string ; pubblicazioni:affiliazioni "CNR-INSEAN, Rome/Italy"^^xsd:string ; pubblicazioni:titolo "Violent seakeeping tests of a fast catamaran"^^xsd:string ; pubblicazioni:isbn "9781622763634"^^xsd:string ; pubblicazioni:curatoriVolume "\u00A0Turnock, S.R., Bertram, V., Hudson, D.A"^^xsd:string ; prodottidellaricerca:abstract "With the main goal of increasing the cruise speed of the ships, designers have proposed a\nwide variety of arrangements. In the most of them, the weight of the vessel can be supported\nby submerged hulls, hydrofoils, air cushion effects, or combinations of them. Two different\ngeometries, the mono-hulls and catamarans are the commonly used. A mono-hull with the\nsame displacement of a catamaran is characterized by a lower wave induced vertical acceleration\nsince its larger length is beneficial from this point of view. The beam-to-draught ratio B/D\nof high-speed mono-hulls, typically around 5, can also exceed 7 in some cases; large B/D\nvalues limit the accelerations in heave and pitch motions, Faltinsen (2005). However the roll\nmotions of mono-hulls need special attention and may matter for ship stability. Among multi-\nhull ships, Small Waterplane Area Twin Hull (SWATH) has higher heave and pitch natural\nperiods and generally lower vertical excitation loads than a similarly sized catamaran. On the\nother hand, if control surfaces are not introduced, the SWATH is dynamically unstable in the\nvertical plane, beyond a threshold Froude number. When operating in head-sea conditions, its\nseakeeping behaviour is better than the one of a corresponding catamaran. However, if the\nsea state, speed and heading cause resonant vertical motions, the SWATH may not have a\ngood seakeeping behaviour. Surface Effect Ships (SES) use an air cushion mechanism to obtain\nthe desired cruise velocity and performances. The excess pressure in the air cushion between\nthe two SES hulls lifts the vessel and carries about 80% of its weight. On the other hand, it\nreduces the metacentric height and causes wave generation and additional wave resistance. As\na consequence, it can suffer more speed loss in waves than for instance a catamaran. Still, the\ntotal calm water resistance is smaller than the one of a catamaran of similar dimensions."@en ; prodottidellaricerca:prodottoDi modulo:ID8609 , modulo:ID8614 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA40457 , unitaDiPersonaleInterno:MATRICOLA40535 , unitaDiPersonaleInterno:MATRICOLA40474 . @prefix parolechiave: . prodotto:ID308707 parolechiave:insiemeDiParoleChiave . parolechiave:insiemeDiParoleChiaveDi prodotto:ID308707 .