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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 63 for “"SPAR"”.
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Dynamic response of spar-type offshore floating wind turbines
In recent years there has been a significant increase in the interest in floating offshore wind turbines from the wind energy industry, governments and academia. Partially driven by the recent nuclear disaster in Japan, but also by the lack or complete absence of shallow waters in various countries …
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Simulation of motion response of spar type oil platform
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 2001.
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Optimum Design of Composite Wing Spar Subjected to Fatigue Loadings
… to failure. It is important to design the wing spars which carry the bending loads, to be fatigue resistant so that damage or expensive inspections could be avoided.</p> <p>Wing models were be made from composite materials with a NACA 0016 airfoil shape, chord length of 9.25”, and a span of …
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Dynamic response analysis of spar buoy floating wind turbine systems
… the design of a synthetic mooring system for spar buoy floating wind turbines functioning in shallow water depths. Nacelle acceleration, static and dynamic tensions on catenaries, the maximum tension acting on the anchors are considered as design performances, and a stochastic analysis method …
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Fabrication and testing of a spar-actuated active compressor rotor blade
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2003.
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Response of a pendulum spar to 2-dimensional random waves and a uniform current
… theory for the response of a circular pendulum spar in 2-dimensional waves and a uniform current is developed. The linear forces on the cylinder are predicted using an approximate potential flow theory for slender bodies. The dynamic equations are then amended to account for the wake effects of …
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Dynamic analysis of a spar-type offshore floating wind turbine and its mooring system
… floating wind turbine (OFWT) supported by a spar platform and held in place with three mooring lines. It is important to study the dynamic responses of the floating platform and the mooring system behaviour so that the OFWT can be designed and constructed safely and economically and generate …
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Identificação de leveduras dentro do complexo Saccharomyces sensu stricto por PCR-fingerpriting
… fingerprinting usando oligonucleotídeos únicos (SPAR) e análise de restrição de genes ribossomais e estruturais. Todas as seis espécies reconhecidas do complexo Saccharomyces sensu stricto foram discriminadas e erros na taxonomia anterior das leveduras de vinho foram observados. Além disso, estes …
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Manufacturing and testing of an active compressor blade for aeroelastic studies
… has blades made of two stress-bearing composite spars, aerodynamically shaped foam, piezoelectric actuators attached to the spar base and a root which allows the blade to be inserted into the rotor. The thesis analyzed the models developed for the active rotor blade design from previous studies …
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A shallow processing approach to anaphor resolution
… reported are implemented in a program called SPAR (Shallow Processing Anaphor Resolver), which resolves anaphoric and other linguistic ambiguities in simple English stories and generates sentence-by-sentence paraphrases that show what interpretations have been selected. Input to SPAR takes the …
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Carbonate rock-water diagenesis lower cretaceous, Stuart City Trend, South Texas
… and aragonite stabilization and equant spar calcite cementation are important products of this diagenesis. The equant spar calcite cements are poor in iron and manganese. They make up approximately 16 percent by volume of the limestones studied. The majority of these cements have δ¹³C …
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A Simulation Model for Estimating Human Error Probability
… the Standardized Plant Analysis Risk-Human (SPAR-H) reliability analysis method is utilized for estimating the probability of human error. The system dynamics simulation model captures the cause and effect relationships of the SPAR-H defined performance shaping factors that affect human error …
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Multifunctional Piezoelectric Energy Harvesting Concepts
… self-charging structures into the wing spar of the aircraft. An electromechanical model based on the assumed modes method is then developed to predict the electrical and mechanical behavior of a UAV wing spar with embedded piezoelectric and thin-film battery layers. Experimental testing …
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Integrated multi-disciplinary design of a sailplane wing
… the twist distribution, and thicknesses of the spar caps, spar webs, and the skin at various stations along the wing. The wing design must satisfy 30 â 31 aeroelastic, structural, aerodynamic, and performance constraints. Two design procedures are investigated. The first, referred to as the …
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Design of an active compressor blade for aeroelastic studies
… Rotor Blades, proposed in this work, uses a spar-and-shell concept which consists of a flexible outer foam shell, structural spars, and piezoelectric actuators. The graphite epoxy spars both carry the load of the blade and induce shape changes of the blade from attached piezoelectric …
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The design and testing of a horizontal axis wind turbine with sailfoil blades
… consists of a framework of a leading edge D spar and a rigid trailing edge spar over which is stretched a fabric sock, forming a wing-like surface. The aerodynamic performance theories of HAWTs are described, as is the aerodynamic, structural and mechanical design of a 4 metre diameter, 3 …
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Fully coupled dynamic analysis of a floating wind turbine system
… loading on the wind turbine. A tension leg spar buoy was designed to support the wind turbine. This design was chosen due to its relatively small size and hence lower potential cost per wind turbine. The system's tethers were attached to the ends of spokes which radiated out from the spar …
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Simultaneous Energy Harvesting and Vibration Control via Piezoelectric Materials
… is a multifunctional composite sandwich wing spar for a small Unmanned Aerial Vehicle (UAV) with the goal of providing self-contained gust alleviation. The basic idea is that the wing itself is able to harvest energy from the ambient vibrations along with available sunlight during normal …
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Quasi-Static Structural Analysis of an Experimental Aircraft Wing
… the strain distribution about the forward spar and front stringer but vary in strain measurements along the aft spar. This variation is likely due to oversimplifications in the finite element model.</p>
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