Search results for " Sail"

showing 10 items of 21 documents

Sistema di supporto per vela alare semi-rigida

2013

La presente invenzione si riferisce ad un sistema di supporto per vela alare, in particolare per una vela alare semi-rigida a geometria variabile per uso nautico.

CAD Sail DesignSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria Industriale
researchProduct

Numerical methods in the design process of a sailing yacht

2014

Computational fluid dynamics conceptual design numerical methods optimization sailing yachtSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria Industriale
researchProduct

Reversing the Trend: a Psychosocial Intervention on Young Immigrants in Sicily

2018

Intervention projects based on providing support for immigrants can offer a number of benefits with regard to the social inclusion of young immigrants. Therefore, the actions suggested in this proposal may not only create a network between institutions and the private sector capable of supporting the intervention of a host country, but may also help to reduce the risk of crime as well as advocating a sense of otherness and integration. The approach to the project, a psychosocial intervention carried out on four young Africans who reached Sicily after crossing the Sicilian Channel on a dilapidated boat, has chiefly been to provide the four individuals with the chance to revisit their origina…

Cultural StudiesImmigration Inclusion Sea Sailboat Sicilymedia_common.quotation_subjectImmigration050109 social psychology03 medical and health sciences0302 clinical medicineIntervention (counseling)0501 psychology and cognitive sciences030212 general & internal medicineClosure (psychology)Demographymedia_commonbusiness.industry05 social sciencesPublic relationsPrivate sectorlanguage.human_languageHost countryAnthropologylanguagebusinessPsychologySettore M-PSI/05 - Psicologia SocialePsychosocialSicilianJournal of International Migration and Integration
researchProduct

DACRON© 360 WOVEN: EXPERIMENTAL CHARACTERIZATION AND COMPUTATIONAL ASPECTS

2010

In this paper a first experimental study on Dacron© 360 woven constitutive behavior is presented. This woven is widely adopted in sail manufacturing, it is obtained by weaving polyethylene terephthalate (PET) yarn and it shows some peculiar features due to its own manufacturing process. The experimental tests, in terms of tensile tests and cyclic tests, clearly show the orthotropy features of the material, its high strength and deformability. The examination with optical microscope of the tested specimen allows to evidence the interaction between warp and weft yarns. The obtained results represent a first step for the definition of a correct computational approach to such materials.

Dacron© Sailcloth Experimental characterization Numerical modelingSettore ICAR/08 - Scienza Delle Costruzioni
researchProduct

Sailing dinghy hydrodynamic resistance by experimental and numerical assessments

2020

Abstract Hull forms of high-performance sailing dinghies are very interesting for yacht designers. After a long period in which the attention has been focused on one-design boats, in recent years a few exciting restricted classes such as International Moth, International 14′, 18’ Skiff and Class A catamaran become recognized in several countries and led to interesting advances in high-performance yacht design. “1001VELAcup R3” class is two people racing dinghy designed according to a box rule with limitation on LOA and Bmax and total sail area. The boats must be designed and built by students of European Universities and race yearly in Italy. This paper focuses on two best-ranked boats “LED…

EngineeringClass (computer programming)Box ruled racing dinghyEnvironmental EngineeringMotion resistancebusiness.industry1001VELAcup020101 civil engineeringOcean Engineering02 engineering and technology01 natural sciences010305 fluids & plasmas0201 civil engineeringSailing hull formsAeronauticsHullLong period0103 physical sciencesHydrodynamic resistanceEFD CFD sailing hull form box ruled sailing dinghy 1001VELAcupbusinessSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialeSettore ING-IND/01 - Architettura NavaleCFDEFD
researchProduct

Using FEM simulation to predict structural performances of a sailing dinghy

2017

The use of finite element method (FEM) tools is proposed to investigate the structural response of an eco-sustainable sailing yacht to different loading conditions, typical of those acting during regattas. The boat is, in particular, a 4.60 m dinghy with the hull and the deck made of an hybrid flax–cork sandwich and internal reinforcements made of marine plywood. A preliminary activity has consisted in the refitting of an existing model in order to reduce the hull weight and to improve performances during manoeuvrings. These tasks have been interactively simulated in the virtual environment of the boat CAD model, where longitudinal and transversal reinforcements were enlightened and the m…

EngineeringFEMbusiness.industry020101 civil engineering02 engineering and technologyStructural engineeringFinite element methodIndustrial and Manufacturing Engineering0201 civil engineeringDeckModeling and simulation020303 mechanical engineering & transports0203 mechanical engineeringBeam (nautical)FEM; Refitting; Sailing yacht; Modeling and Simulation; Industrial and Manufacturing EngineeringRefittingHullModeling and SimulationSailing yachtEngineering design processbusinessSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria IndustrialeStrain gaugeFem simulations
researchProduct

ESTCube-1 in-orbit experience and lessons learned

2015

ESTCube-1 is a student satellite project lead by the University of Tartu, Estonia, and supported by the European Space Agency (ESA) via Plan for European Cooperating States (PECS). Development of ESTCube-1 has been a collaborative effort with many international partners. The satellite is shown on Figure 1 [1].

Engineeringta115ta213business.industrynanosatelliteCubeSatE-sailAerospace EngineeringPlan (drawing)satellite designelectric solar wind sailsatellitesESTCube-1AeronauticsSpace and Planetary ScienceAgency (sociology)Space techniquesSatelliteElectrical and Electronic EngineeringOrbit (control theory)Aerospace engineeringelectric solar wind sailsbusinessSpace researchIEEE Aerospace and Electronic Systems Magazine
researchProduct

Fluid–structure interaction of downwind sails: a new computational method

2018

The spreading of high computational resources at very low costs led, over the years, to develop new numerical approaches to simulate the fluid surrounding a sail and to investigate the fluid–structure interaction. Most methods have concentrated on upwind sails, due to the difficulty of implementing downwind sailing configurations that present, usually, the problem of massive flow separation and large displacements of the sail under wind load. For these reasons, the problem of simulating the fluid–structure interaction (FSI) on downwind sails is still subject of intensive investigation. In this paper, a new weak coupled procedure between a RANS solver and a FEM one has been implemented t…

Finite element methodComputer science020101 civil engineeringOcean Engineering02 engineering and technologyComputational fluid dynamicsMainsailInteractive sail designOceanographyWind speed0201 civil engineeringComputational fluid dynamicFluid–structure interactionMechanics of MaterialSettore ING-IND/15 - Disegno E Metodi Dell'Ingegneria Industrialebusiness.industryMechanical EngineeringSolverFinite element methodWind engineeringMechanics of MaterialsGennakerFluid–structure interaction Finite element method Computational fluid dynamics Gennaker Mainsail Interactive sail designConvergence problembusinessReynolds-averaged Navier–Stokes equationsFluid–structure interactionMarine engineering
researchProduct

Emulation of Leaf, Canopy and Atmosphere Radiative Transfer Models for Fast Global Sensitivity Analysis

2016

Physically-based radiative transfer models (RTMs) help understand the interactions of radiation with vegetation and atmosphere. However, advanced RTMs can be computationally burdensome, which makes them impractical in many real applications, especially when many state conditions and model couplings need to be studied. To overcome this problem, it is proposed to substitute RTMs through surrogate meta-models also named emulators. Emulators approximate the functioning of RTMs through statistical learning regression methods, and can open many new applications because of their computational efficiency and outstanding accuracy. Emulators allow fast global sensitivity analysis (GSA) studies on adv…

PROSPECTSAIL010504 meteorology & atmospheric sciencesradiative transfer modelsScience0211 other engineering and technologies02 engineering and technologyemulatorSolar irradiance01 natural sciencessymbols.namesakeRadiative transferSensitivity (control systems)Gaussian process021101 geological & geomatics engineering0105 earth and related environmental sciencesRemote sensingMathematicsMODTRANArtificial neural networkMODTRANQDiffuse sky radiationemulator; global sensitivity analysis; machine learning; radiative transfer models; PROSPECT; SAIL; MODTRANmachine learningglobal sensitivity analysisRadiancesymbolsGeneral Earth and Planetary SciencesRemote Sensing
researchProduct

Periodic Motion for an Imperfect Solar Sail Near an Asteroid

2014

In this paper we consider the Hill 3-body problem with the extra effect of the solar radiation pressure as a model for the motion of a solar sail close to an asteroid. To model the sail’s acceleration, we include both reflectivity and absorption of the sail’s material. We describe the most relevant dynamical properties of the system for different reflectivity and absorption coefficients as well as different fixed sail orientations. We show families of periodic orbits, describe how they relate to the parameters of the sail and discuss their stability.

PhysicsOrbital planeAstronomySolar sailMechanicsQuantitative Biology::OtherStability (probability)Periodic functionPhysics::Popular PhysicsAccelerationRadiation pressureAsteroidPhysics::Space PhysicsAstrophysics::Earth and Planetary AstrophysicsAbsorption (electromagnetic radiation)
researchProduct