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Dissertations / Theses on the topic 'Wing spar'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Lazarin, Juan Reuben. "Optimum Design of Composite Wing Spar Subjected to Fatigue Loadings." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1816.

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Composites are now being incorporated into aircraft designs because of their high strength to weight ratio compared to traditional metal materials. Due to the complexity of the material, composite parts are presently being over designed to satisfy static and fatigue requirements. A greater understanding of composite fatigue behavior will allow for even greater weight savings leading to increased fuel economy. A critical part of an aircraft that is subjected to fatigue bending loads are its wings. The forces acting on the wings include its lift distribution, powerplant, and fuel which can be ca

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2

Kite, Adam Howard. "Nondestructive evaluation of a carbon fiber wing spar using air-coupled ultrasound." [Ames, Iowa : Iowa State University], 2007.

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3

Hála, Aleš. "Návrh změny kostrukčního řešení hlavních závěsů křídla letounu Z 242." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417468.

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This diploma thesis deals with modernization of the Z 242 L aircraft wing. The main emphasis is given to the connection of the wing and fuselage. The new concept of both main and rear wing spar is designed together with integral fuel tank. The strength of the structure is evaluated analytically and numerically by use of Finite element analysis. Wide range of milling operations is implemented into manufacturing process as well. This thesis shows how to innovate current aircraft with respect to feasibility of the design in case of future project realization.

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4

Thompson, Eric J. "Design of a multi-piece removable mandrel mold tool to fabricate and control inner mold surface contour of a composite wing spar." Morgantown, W. Va. : [West Virginia University Libraries], 2010. http://hdl.handle.net/10450/11141.

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Thesis (M.S.)--West Virginia University, 2010.<br>Title from document title page. Document formatted into pages; contains viii, 69 p. : col. ill. Includes abstract. Includes bibliographical references (p. 69).

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Cejpek, Jakub. "Analysis of Aeronautical Composite Structures under Static Loading." Doctoral thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-385288.

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Poměrně velké množství soukromých firem v České republice vyrábí lehká sportovní letadla. Značná část těchto letadel využívá kompozitní pružiny ve svých přistávacích zařízení. Tyto pružiny jsou buďto menší díly, absorbující energii (na příďové noze či ostruze), anebo jde celé pružnice hlavního podvozku. Všechny tyto pružiny sdílí základní charakteristiky: jsou vyrobeny převážně z jednosměrného kompozitu s významnou tloušťkou, hlavním druhem zatížení je ohybový moment a jsou očekávány velké deformace. Podobnou charakteristiku můžeme použít i při popisu hlavního nosníku křídla. Jak vypadá návrh

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Mestrinho, João Rafael da Conceição. "Design of a variable-span morphing wing." Master's thesis, Universidade da Beira Interior, 2009. http://hdl.handle.net/10400.6/2048.

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The present work focuses on the study, design and validation of a variable-span morphing wing to be tted to the UAV \Olharapo". Using an optimization code, which uses a viscous two-dimensional panel method formulation coupled with a non-linear liftingline algorithm and a sequential quadratic programming optimization routine, na aerodynamic analysis is performed to estimate the optimal values of wing span which ensure minimum drag across the ight speed envelope. The UAV ies in a relatively short speed range - from about 12 m/s to 30 m/s. Near its maximum speed it is possible to obtain a 20

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7

Proskovics, Roberts. "Dynamic response of spar-type offshore floating wind turbines." Thesis, University of Strathclyde, 2015. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=26017.

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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 around the globe (making fixed offshore wind turbines infeasible), multiple different topology floating offshore wind turbines have been proposed and, in some cases, prototypes built and installed offshore. The most well-known of these is Hywind by Statoil, which has been operational off the coast o

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8

Solberg, Thomas. "Dynamic Response Analysis of a Spar Type Floating Wind Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-16215.

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Wind power is a large natural source for renewable energy, and many countries have shown interest in establishing floating offshore wind parks. There are many advantages with floating offshore wind turbines, but also many challenges connected to them. This report focuses on establishing a model for wave-wind induced loading on a Spar type floating wind turbine named OC3-Hywind. The OC3-Hywind is a modified version of an original design developed by Statoil. Two fellow MSc students have developed models for a tension leg platform (TLP) and a semi-submersible, and a comparison between the three

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Lee, Sungho Ph D. Massachusetts Institute of Technology. "Dynamic response analysis of spar buoy floating wind turbine systems." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46545.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2008.<br>Includes bibliographical references (leaves 83-84).<br>The importance of alternative energy development has been dramatically increased by the dwindling supplies of oil and gas, and our growing efforts to protect our environment. A variety of meaningful steps have been taken in order to come up with cleaner, healthier and more affordable energy alternatives. Wind energy is one of the most reliable energy alternatives for countries that have sufficiently large wind sources. Due to the presence of ste

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10

Sanches, Tiago Nunes. "Longitudinal flight control with a variable span morphing wing." Master's thesis, Universidade da Beira Interior, 2012. http://hdl.handle.net/10400.6/2006.

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The present study focuses on the design of a longitudinal flight controller for an unmanned aircraft equipped with dissymmetric variable-span system (VSMW or Variable-Span Morphing Wing). Its primary role consists in the longitudinal flight stabilization of the aeroplane while in levelled cruise flight, although, it was designed to offer longitudinal flight stabilization for other flight phases as well, such as e.g. take-off and landing. The stabilization algorithm relies on the most up-to-date developments in the state-of-the-art LQR and Batz-Kleinman controller techniques to stabilize the ai

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11

Berhe, Awot M. "Aerodynamic analysis of finite-span wings." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79998.

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This thesis presents a new method of solution for the aerodynamics of finite-span wings, which overcomes the difficulties of the previous methods. The present method uses velocity singularities in the Trefftz plane (situated downstream at infinity) to derive the contributions in the solution of the circulation distribution caused by the changes in the spanwise variation of the wing chord and incidence. The new specific functions derived for these contributions contain both natural and forced symmetry and antisymmetry terms, and thus represent a correct mathematical modeling of the physi

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12

Zhang, Xi M. Eng Massachusetts Institute of Technology. "Wind effect on long span bridge." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/74418.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 41-42).<br>This thesis has studied different types of reactions of long span bridge under wind load, such as vortex shedding, flutter and buffeting. Since all of these conditions have the chance to damage bridge structure, we calculate the particular wind speed and magnitude that will maximize the reaction. To check if the theory works well, a bridge model is set up and analyzed in SAP2000 and the result

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13

Rashid, Adnan. "Investigation of through-thickness assembly stresses in composite wing spars." Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.722699.

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14

Wiggins, Leonard D. III. "Structural Design and Analysis of a Kinematic Mechanism for a Morphing Hyper-Elliptic Cambered Span (HECS) Wing." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9668.

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The HECS wing was developed by NASA Langley Research Center and has a nonplanar, hyper-elliptically swept leading and trailing edge as well as spanwise camber. For this wing, the leading and trailing edges are swept back according to a hyper-elliptical equation. The span of the wing is also defined with hyper-elliptical anhedral giving it nonplanar spanwise camber. A single-degree-of-freedom mechanism is developed to provide a means for the wing to continuously change shape from its nonplanar to planar configuration. The mechanism uses a repeating quaternary-binary link configuration to transl

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15

Moy, Inge. "Parameter Sensitivity of Short-term Fatigue Damage of Spar-type Wind Turbine Tower." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18511.

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The Worlds energy demand is rapidly increasing and a good viable renewable energy source is wind power. The land-based knowledge and experience the onshore wind turbine industry possess is used to develop offshore wind turbines. With this knowledge together with the experience and knowledge of the marine industry we can design and produce a floating wind turbine. The main advantages of an offshore wind turbine are that the wind is stronger and less turbulent at sea, visual and noise annoyances can be avoided and there are large available areas at sea. In this thesis coupled time domain a

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16

Mehler, Felix Eckhart. "The structural testing and modification of a full-scale ornithopter's wing spars." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq29368.pdf.

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17

Henry, Janisa Jernard. "Roll control for UAVs by use of a variable span morphing wing." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/3288.

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Thesis (M.S.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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18

Saracevic, Nermina. "Comparison of electricity production between semi-submersible and spar-buoy floating offshore wind turbines." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-381386.

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The paper compares electricity production between the semi-submersible and the spar-buoy floating wind turbine systems under normal, stochastic and extreme wind conditions at Utsira Nord site located on the Norwegian continental shelf in the North Sea. The analysis of complex behavior of the floating wind turbine system and the fluid-structure interaction is performed in aero-servo-hydro-elastic code ASHES. The results indicate a slightly better energy performance of the semi-submersible than the spar in all load cases but one. The pitch and heave degrees of freedom are evaluated as the most r

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Blondeau, Julie E. "Development and testing of a variable aspect ratio wing using pneumatic telescopic spars." College Park, Md. : University of Maryland, 2004. http://hdl.handle.net/1903/1761.

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Thesis (M.S.) -- University of Maryland, College Park, 2004.<br>Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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20

Dziubinschi, Alexandru. "Analysis of finite span wings based on velocity singularities." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30242.

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The thesis presents the analysis, based on velocity singularities, of the upswept finite span wings of various planforms and distributions of incidence.<br>The method of velocity singularities has been first introduced by Mateescu for the analysis of the flow past airfoils, based on the singular behaviour of the fluid velocity near the leading edge and ridges.<br>In this work, the method of velocity singularities is extended to determine the solution of the flow in the Trefftz plane normal to the uniform stream.<br>Velocity singularities are used to obtain directly the complex expression of th

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Dziubinschi, Alexandru. "Analysis of finite-span wings based on velocity singularities." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0030/MQ64218.pdf.

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22

Karimirad, Madjid. "Stochastic Dynamic Response Analysis of Spar-Type Wind Turbines with Catenary or Taut Mooring Systems." Doctoral thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-12458.

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Floating wind turbines can be the most practical and economical way to extract the vast offshore wind energy resources at deep and intermediate water depths. The Norwegian Ministry of Petroleum and Energy is strongly committed to developing offshore wind technology that utilises available renewable energy sources. As the wind is steadier and stronger over the sea than over land, the wind industry recently moved to offshore areas. Analysis of the structural dynamic response of offshore wind turbines subjected to stochastic wave and wind loads is an important aspect of the assessment of their po

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23

Sohaib, Muhammad. "Parameterized Automated Generic Model for Aircraft Wing Structural Design and Mesh Generation for Finite Element Analysis." Thesis, Linköpings universitet, Maskinkonstruktion, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71264.

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This master thesis work presents the development of a parameterized automated generic model for the structural design of an aircraft wing. Furthermore, in order to perform finite element analysis on the aircraft wing geometry, the process of finite element mesh generation is automated. Aircraft conceptual design is inherently a multi-disciplinary design process which involves a large number of disciplines and expertise. In this thesis work, it is investigated how high-end CAD software‟s can be used in the early stages of an aircraft design process, especially for the design of an aircraft wing

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24

Bubert, Edward A. "Highly extensible skin for a variable wing-span morphing aircraft utilizing pneumatic artificial muscle actuation." College Park, Md. : University of Maryland, 2009. http://hdl.handle.net/1903/9332.

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Thesis (M.S.) -- University of Maryland, College Park, 2009.<br>Thesis research directed by: Dept. of Aerospace Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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25

Seytre, Jean-François. "Theoretical solutions for finite span wings of arbitrary shapes using velocity singularities." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29547.

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This thesis presents a new theoretical approach based on the concept of velocity singularities developed by Mateescu for airfoils in subsonic flows and for wing-body systems in supersonic regime. The present approach uses the velocity singularities in the Trefftz plane to derive the contributions of the wing incidence and chord changes in the solution of the circulation variation along the wing span. The new specific functions derived for these contributions contain both natural and forced symmetry and anti-symmetry terms, and represent the first correct mathematical modeling of the physical p

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26

Olivato, Giuseppe [Verfasser], and Dieter [Akademischer Betreuer] Dinkler. "Managing Wind Risk on Long Span Roofs / Giuseppe Olivato ; Betreuer: Dieter Dinkler." Braunschweig : Technische Universität Braunschweig, 2010. http://d-nb.info/1175826936/34.

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27

Matus, Manuel A. Mr. "Experimental Investigation of Wind-induced Response of Span-wire Traffic Signal Systems." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3655.

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The purpose of this investigation was to identify key design parameters that might significantly affect the response of span wire traffic light systems during extreme wind events. The performance of these systems was assessed through physical testing in an effort to quantify the effect of sag ratio, wire tension and wire clearance. The Wall of Wind experimental facility at Florida International University was utilized for testing the systems at different wind speeds and wind directions. The findings showed that, at all tested wind directions, lift, drag and tension forces increased with increa

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Gluck, Jeffrey Weston, and Jeffrey Weston Gluck. "Water Tunnel Experiments on Span-wise Variation of Laminar Separation Bubbles for Swept and Unswept Wings using Particle Image Velocimetry." Thesis, The University of Arizona, 2016. http://hdl.handle.net/10150/621851.

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An inverted airfoil mounted above a flat plate was used to create laminar separation bubbles on a flat plate in water tunnel experiments at low Reynolds numbers. Boundary layer suction ensured that the flow remained attached to the wing. Two-dimensional PIV measurements were used to qualitatively and quantitatively characterize the spanwise bubble variation on an unswept wing and on the same wing featuring a 22 degree sweep. The separation bubbles were recorded at varied span-wise locations in a 31.5 cm wide region of the flow. The limitations of this measurement region were dictated by the

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Ashtiani, Abdi Iman. "Experimental And Numerical Investigation Of The Wind Effects On Long Span Bridge Decks." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613615/index.pdf.

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Long span bridges are susceptible to wind. Hence it is important to study their wind-induced vibrations to avoid any probable structural failures. In this thesis, the results of an experimental and computational investigation of the aerodynamic characteristics of trapezoid bridge deck cross-sections with three different aspect ratios (10, 12 and 15) and four different side angles (75&ordm<br>, 60 &ordm<br>, 45 &ordm<br>and 30 &ordm<br>) are analyzed and presented. The flow around rigid fixed bridge deck models is investigated to obtain the relevant aerodynamic coefficients and the vortex shedd

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De, Shuvodeep. "Structural Modeling and Optimization of Aircraft Wings having Curvilinear Spars and Ribs (SpaRibs)." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/88467.

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The aviation industry is growing at a steady rate but presently, the industry is highly dependent on fossil fuel. As the world is running out of fossil fuels and the wide-spread acceptance of climate change due to carbon emissions, both the governments and industry are spending a significant amount of resources on research to reduce the weight and hence the fuel consumption of commercial aircraft. A commercial fixed-wing aircraft wing consists of spars which are beams running in span-wise direction, carrying the flight loads and ribs which are panels with holes attached to the spars to preserv

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Lindqvist, Mattias, and Jonas Lundin. "Spare Part Logistics and Optimization for Wind Turbines : Methods for Cost-Effective Supply and Storage." Thesis, Uppsala University, Division of Systems and Control, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-122891.

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<p>The wind power industry is maturing and the amount of electricity produced by wind turbines in the world is rapidly increasing every year. Service and maintenance of wind turbines has proven to be difficult and expensive, especially offshore. A well coordinated support organisation and optimized maintenance strategies are required to effectively reduce the costs associated with WT support, where cost-efficient supply and storage of spare parts are important. The aim of this thesis is to model spare part logistics for wind turbines to analyse different strategies and compare the profitabilit

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Kaya, Halil. "Aerodynamic Analysis Of Long-span Bridge Cross-sections Using Random Vortex Method." Master's thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615072/index.pdf.

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In this thesis, two dimensional, incompressible, viscous flow past bluff bodies and a bridge section, in which strong vortex shedding and unsteady attribute of flow are generally found, is simulated by means of random vortex method. The algorithm and method are described in detail. The validation and applicability of the developed numerical implementation to general wind engineering problems is illustrated by solving a number of classical problems, such as flow past circular and square cylinders. An application of the numerical implementation in the area of computational wind engineering is pe

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Johansson, Jim. "Utilizing Energy Storage Applied on Floating Wind Turbine Economics Using a Spot-Price Based Algorithm." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-328934.

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In this paper, a new algorithm for utilizing energy storage is proposed and applied on floating wind turbine economics. The proposed algorithm’s decision making on storing energy or selling electricity onto the grid is based on the electricity price, which makes it unique and different from similar algorithms. From the literature review, it was concluded Ocean Renewable Energy Storage to be most suitable with the Spar-Type and Semi-Submersible floating wind turbine to which the paper is based upon. The objective of this paper is to find the suitable ratio of energy storage versus wind farm, fi

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Mohammadi, M. Sajad, and Rishiraj Mukherjee. "Wind Loads on Bridges : Analysis of a three span bridge based on theoretical methods and Eurocode 1." Thesis, KTH, Bro- och stålbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-125349.

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The limitations lying behind the applications of EN-1991-1-4, Eurocode1, actions on structures-general actions-wind load-part 1-4, lead the structural designers to a great confusion. This may be due to the fact that EC1 only provides the guidance for bridges whose fundamental modes of vibration have a constant sign (e.g. simply supported structures) or a simple linear sign (e.g. cantilever structures) and these modes are the governing modes of vibration of the structure. EC1 analyzes only the along-wind response of the structure and does not deal with the cross wind response. The simplified me

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Baro, Laura [Verfasser], and Udo [Akademischer Betreuer] Peil. "Long span bridges under wind actions / a non-linear fluid force model / Laura Baro ; Betreuer: Udo Peil." Braunschweig : Technische Universität Braunschweig, 2011. http://d-nb.info/1175824178/34.

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Ji, Wenhao. "A study into the sustainable system between the wind and the villages in Rincón de Ademuz. Spain." Doctoral thesis, Universitat Politècnica de València, 2014. http://hdl.handle.net/10251/39001.

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El objetivo del estudio es analizar el sistema sostenible de Rincón de Ademuz, donde perdura en el tiempo un poblado que permanece asentado desde hace dos mil años.<br>Ji, W. (2014). A study into the sustainable system between the wind and the villages in Rincón de Ademuz. Spain [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/39001<br>TESIS

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Cerqueira, Sandro Melo. "Aspetos morfológicos dos insetos e sua importância na polinização." Master's thesis, Universidade de Évora, 2015. http://hdl.handle.net/10174/17441.

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A maioria das plantas com flor é visitada por grande diversidade de insetos com diferentes formas e tamanhos, que acumulam grãos de pólen nos seus corpos. Neste trabalho analisou-se a relação entre os parâmetros morfométricos dos insetos visitantes florais (comprimento do corpo, envergadura das asas e comprimento da probóscide no caso dos lepidópteros) e número de grãos de pólen transportados. Verificou-se um efeito linear positivo relativamente ao comprimento do corpo dos insetos, ou seja, quanto maior o comprimento do corpo, maior o número de grãos de pólen transportados; também se verificou

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Rensa, Pavel. "Návrh koncepce systému vztlakové klapky pro novou generaci sportovního letounu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-228926.

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ploma thesis deals with design of a four-seat sport aircraft for basic training, tourist flying and glider towing, which can be used in aeroclubs and by private owners. The objective of this thesis was to design the outer shapes of the aircraft, compute the basic aerodynamic characteristics and performance, design of structural and aerodynamic layout of the wing and design of flap system with governing.

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Jančář, Milan. "Prodloužení životnosti letounů ZLIN Z 126 a 226." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230182.

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This master's thesis discusses the possibilities of safe-life extension program for ZLIN Z 126 and 226 airplanes, which despite their age and long-end production are still widespread and popular not only in the Czech Republic. The age of these aircraft is also related to the fact, that some aircraft are already approaching its border life, so there is an interest for the longest possible technical and legislative airworthiness. As mentioned in my bachelor's thesis, during the existence of this model series, there was no major damage occurred, except for sporadic exfoliation corrosion of wing f

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Vojtěšek, Jiří. "MORAVSKÉ VINAŘSKÉ CENTRUM BRNO." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-354946.

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The city of Brno has always been a center of Moravian wine. The new draft of wine center responds to this reality and represents the grandeur of wineries in its full glory. Respect for nature, love for traditions and love for order/system are the main aspects of the design. The proposal is essentially open to the public, however, the necessary modesty is preserved. Conversely taciturnity of production part of buliding holds the secrets of the deep traditions of Viticulture and Enology. Designed buildings are used for production, wine storage, administration associated with the production, tast

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Kasalová, Nicol. "MORAVSKÉ VINAŘSKÉ CENTRUM BRNO." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-354971.

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The study design includes the new building of the Moravian wine and cultural center on the Hlinky street in Brno. There are spaces designed for wineries (producing, maturing and storing wine), administration, congress center (with business lounges), spa, restaurant and gastro-studio, shops, exhibition, hotel and parking. The building is trapezoidal shape and replace the existing object in a vacant lot, only some historical cellars will be retained. The supporting structure consists of reinforced concrete skeleton system and reinforced concrete reinforcing inner core around the staircase leadin

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Pereira, da Silva Carlos Manuel Baptista. "Design and testing of an active aircraft wing spar with bending-torsion coupling." Thesis, 2007. http://hdl.handle.net/1828/2228.

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An experimental investigation on active aeroelastic aircraft structures with bending-torsion coupling properties is presented. Two techniques for vibration and flutter alleviation are studied and tested. The passive approach is based on the use of carbon composite spars with misaligned fibres. The second technique involves an active spar with a multi-cross section embedded with PZT actuators. A wing was designed and manufactured for testing in a wind tunnel and subsequently implemented on a demonstrator platform for flight testing. Results show that a carefully designed misalignment of the fi

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Cunha, Rui Filipe Martins Fernandes. "Structural analysis of a variable-span wing-box." Master's thesis, 2014. http://hdl.handle.net/10400.6/5223.

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This dissertation describes the work done to analyse the wing-box of a variable-span wing. Based on previous work in the CHANGE project the main objective of this study is the experi-mental analysis of the wing-box structure’s prototype build at Universidade da Beira Interior, one of the CHANGE project partners. Surrounding the preliminary design of this project, a nu-merical model written, concerning a parallel work, was modified and used to analyse the mass and displacement variations according to the moving fraction and semi-span of the morphing wing-box. It was first dimensioned the jig to

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Felício, João Miguel Inácio. "Development and testing of a variable-spam morphing wing." Master's thesis, 2010. http://hdl.handle.net/10400.6/3663.

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The present work focuses on the development and validation of a variable-span morphing wing (VSW) to be fitted to a mini UAV. An electro-mechanical actuation mechanism is developed using a simple rack and pinion system. The wing model is designed with the help of graphical CAD/CAE tools and then a full scale model is built for bench testing the strength, power consumption, deployment time and efficiency. The concepts used on the morphing wing for both fixed and moving wing parts are considered simple and effective. Construction methods and materials were evaluated in order to obtain a system a

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Sultania, Abhinav. "Reliability analysis of a spar buoy-supported floating offshore wind turbine." Thesis, 2010. http://hdl.handle.net/2152/ETD-UT-2010-08-1864.

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While wind energy has witnessed faster growth than any other renewable energy source in recent years, two issues—the decreasing availability of large land expanses for new wind farms and transmission difficulties arising from siting wind farms in remote regions far from load centers—have slowed down this growth considerably. Siting wind turbines offshore places the generating capacity closer to population and load centers; thus, reducing grid congestion. Also, at offshore sites, one can expect higher wind speeds, decreased turbulence, and reduced noise and visual impact constraints. Offshore

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Hou, Tzu-Hsuan, and 侯詞軒. "Scale Effect of Wing Span and Flight Kinematic Strategies in Free-Flying Butterflies." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7k94xr.

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碩士<br>國立臺灣大學<br>機械工程學研究所<br>105<br>The scale of butterflies largely variate among species, and might affect their flight performance intrinsically. In this work, we carry out experimental observations and numerical analysis to investigate how flight performances and flight motions of butterflies correlate with their sizes, and a flight strategy to enhance wing loading of small size butterflies is proposed accordingly. Four different species of Taiwan butterflies with significant differences on wingspan (variating from 44-136 mm) were selected to study experimentally. The motions of butterflies

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Mcclelland, Charles. "Asymmetric Blade Spar for Passive Aerodynamic Load Control." 2013. https://scholarworks.umass.edu/theses/1136.

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Asymmetric bending is explored as a means of inducing bend-twist coupling in an isotropic, fixed-wing airfoil. An analytical model describing the bend-twist coupling behavior of a constant-section airfoil undergoing steady wind loading is derived from Euler-Bernoulli beam theory, and evaluated over a range of structural and material stiffness. Finite element analysis is carried out in the ANSYS Parametric Design Language environment for an asymmetric, two-dimensional beam. Three-dimensional finite element analysis is carried out for two candidate blade models created in Pro/Engineer based on t

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Salvatori, Luca. "Assessment and mitigation of wind risk of suspended-span bridges /." 2007. http://www.gbv.de/dms/bs/toc/566320371.pdf.

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Hung, Shih-Pei, and 洪詩姵. "Dynamic characteristics of long span roof structure under wind loading." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/88948104209612537350.

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碩士<br>淡江大學<br>土木工程學系碩士班<br>97<br>Due to the increase of span length and the reduction of total structural mass, the structural behavior of long span roof structure become more complicated. The sensitivity to wind for this type of structure is also increased. Because Taiwan is a typhoon prone area, the importance of wind resistant design of the type of structures can not be ignored. The main purpose of this thesis is to develop a method combined POD and Ritz vectors for improving the efficiency of calculations in the dynamic analysis of the long span roof structures under wind excitations.

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Wu, Tzung-Shu, and 吳宗書. "Time Series Simulation of Wind Loads on Long-Span Bridges." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/25613865153651672350.

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碩士<br>淡江大學<br>土木工程學系<br>88<br>The developments of bridge construction techniques and the improvements of high strength materials have made modern bridges designed and built towards longer spans with more slender sections. Because these types of bridges are more flexible than the other types of bridges, they are very sensitive to wind loading. This paper is made use of time domain analysis. Therefore, it is required to simulate a continuous time series of gusty wind with a specified power spectral density, and the next step is to compute the dynamic response and internal force of the structures

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