Search results for "Yacht"
showing 9 items of 19 documents
Designing the internal reinforcements of a sailing boat using a topology optimization approach
2022
In naval design it is common practice to define an internal regular web frame made of longitudinal elements and transversal sections with the purpose of giving stiffness to the whole structure and, at the same time, promoting lightness. In this work, FEM simulation and Topology Optimization (TO) tools are implemented to present a different approach in placing the reinforcements inside the hull of a sailing dinghy. The methodology proposed in this paper considers as a starting point the volume inside the hull and the deck completely filled with material and the result after the simulations is a free form shape of the sailboat reinforcements. The TO procedure is based on two different input F…
A multi-technique simultaneous approach for the design of a sailing yacht
2015
In this paper, most significant steps involved during the whole process of designing a sailing yacht are outlined. In particular, a novel simultaneous approach has been proposed to optimize the design process of a sailing yacht. Analytical resistance prediction models are simultaneously used with CAD systems and computational fluid dynamics tools to find, in the more effective way, the best solution for the chosen design conditions. As a general rule, in fact, once the target point has been decided, task of the designer is the definition of those systems of aerodynamic and hydrodynamic forces that are in equilibrium when the boat sails at its target. Unfortunately, a multi-purpose yacht doe…
A reverse engineering approach to measure the deformations of a sailing yacht
2016
In this work, a multidisciplinary experience, aimed to study the permanent deformations of the hull of a regatta sailing yacht is described. In particular, a procedure to compare two different surfaces of the hull of a small sailing yacht, designed and manufactured at the University of Palermo, has been developed. The first one represents the original CAD model while the second one has been obtained by means of a reverse engineering approach. The reverse engineering process was performed through an automatic close-range photogrammetry survey, that has allowed to obtain very accurate measures of the hull, and a 3D modelling step by the well-known 3D computer graphics software Rhinoceros. The…
Interactive roll stabilization comparative analysis for large yacht: gyroscope versus active fins
2020
The problem of the active stabilization of ship motions is particularly important in the case of pleasure boats or in any case of passenger ships, since the commercial value of the ship is directly related to the comfort of the load transported in this case “people”, considered as stresses induced on them by the vessel movements, with particular attention to roll, given the ship geometric characteristics. Naval architects developed trough the years different solutions to reduce the roll of the ship, and consequentially to increase the passengers comfort, and the development of this solutions followed the progress of technology. Active fins have been the most used, but now the gyroscope solu…
Come e dove si insegna a progettare le barche
2009
Il settore della nautica esprime attualmente una forte vocazione professionale sia sul versante delle competenze necessarie alla progettazione di unità da diporto, sia sul versante della gestione delle varie fasi del processo produttivo. L’evoluzione tecnico-scientifica raggiunta in questi anni ha prodotto un progressivo ampliamento delle conoscenze che impone però un continuo adeguamento delle metodologie progettuali alle nuove esigenze produttive. Il progettista che opera nel settore della nautica, forse più che in altri campi, deve interfacciarsi con discipline diverse. La storia dell'insegnamento del design per la nautica presso la facoltà di Architettura di Palermo ha avuto inizio nel …
Progettazione e Confronto di Barche a Vela Mediante Analisi CFD
2010
Le simulazioni fluidodinamiche computazionali (CFD) forniscono uno strumento particolarmente utile alla valutazione delle caratteristiche di barche a vela. La possibilità di studiare differenti carene e piani velici, ha permesso di mettere a punto geometrie che senza l’ausilio di queste tecniche innovative sarebbero apparse difficilmente raggiungibili. Nel presente lavoro sono state messe a confronto due barche a vela progettate e costruite per partecipare alle regate di Mille e una Vela per l’Università – manifestazione didattico/sportiva organizzata dall’Università Roma Tre.
Parametric Design of Sailing Hull Shapes
2006
The author presents an original algorithm aimed at automatically generating the hull shape of a sailing yacht starting from an initial set of parameters. The procedure consists of two steps. First one keel line and a Designed Water Line (DWL in the following) are faired according to a set of parameters, say length of water line, canoe body draft, stem angle and some adimensional coefficients. This information is then used to fair the hull surface, which must in turn fulfil more prerequisites (parameters like displaty cement, floatation area and related coefficients). The hull is defined by means of a B-spline surface, the fairing of which is ensured by allowing for all the imposed objective…
Il turismo nautico dei superyacht in Italia
2008
La nautica da diporto in Italia ha aumentato il suo fatturato di 11 punti percentuali nel 2006 confermando un trend di crescita che si è dimostrato continuo nel corso dell’ultimo decennio. In particolare, si assiste nel corso degli ultimi sette anni al consolidamento della produzione italiana di superyacht . Tale trend continuerà a crescere nel corso dei prossimi anni tenuto conto che nel 2007 i cantieri mondiali hanno ricevuto ordini per la costruzione di 777 nuovi superyacht di cui la metà (347) sono stati commissionati a cantieri italiani. Nonostante la metà della produzione di yacht è destinata all’estero, si assiste ad una crescita del numero di superyacht iscritti nei registri nautici…
Il diportismo nautico e le attività economiche in Sardegna
2013
Operating in a complex globalized world, tourism destinations are continuously challenged to improve their performance in order to stay competitive in a dynamic environment they have to identify new potential markets, to develop networks, clusters and new products. Today the current forms of tourims that are emerging request to spend leisure time as actively as possible and the development of niche tourism with these characteristics can represent a sustainable development strategy for destinations ...