Dissertations / Theses on the topic 'Wind loads'
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Reeves, P. "Wind loads on semi-submersible platforms." Thesis, University of Strathclyde, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382429.
Full textZhang, Yu Ph D. Massachusetts Institute of Technology Department of Mechanical Engineering. "Wave loads on offshore wind turbines." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/100344.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (page 65).
Ocean energy is one of the most important sources of alternative energy and offshore floating wind turbines are considered viable and economical means of harnessing ocean energy. The accurate prediction of nonlinear hydrodynamic wave loads and the resulting nonlinear motion and tether tension is of crucial importance in the design of floating wind turbines. A new theoretical framework is presented for analyzing hydrodynamic forces on floating bodies which is potentially applicable in a wide range of problems in ocean engineering. The total fluid force acting on a floating body is obtained by the time rate of change of the impulse of the velocity potential flow around the body. This new model called Fluid Impulse Theory is used to address the nonlinear hydrodynamic wave loads and the resulting nonlinear responses of floating wind turbine for various wave conditions in a highly efficient and robust manner in time domain. A three-dimensional time domain hydrodynamic wave-body interaction computational solver is developed in the frame work of a boundary element method based on the transient free-surface Green-function. By applying a numerical treatment that takes the free-surface boundary conditions linearized at the incident wave surface and takes the body boundary condition satisfied on the instantaneous underwater surface of the moving body, it simulates a potential flow in conjunction with the Fluid Impulse Theory for nonlinear wave-body interaction problems of large amplitude waves and motions in time domain. Several results are presented from the application of the Fluid Impulse Theory to the extreme and fatigue wave load model: the time domain analysis of nonlinear dynamic response of floating wind turbine for extreme wave events and the time domain analysis of nonlinear wave load for an irregular sea state followed by a power spectral density analysis.
by Yu Zhang.
S.M.
Garber, Jason. "Wind loads on and wind-induced overturning of container cranes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0005/MQ42064.pdf.
Full textBarata, Johann. "Evaluation of Wind Loads on Solar Panels." FIU Digital Commons, 2011. http://digitalcommons.fiu.edu/etd/567.
Full textBrowning, Stephen E. "Computer Program for the Analysis of Loads on Buildings Using the ASCE 7-93 Standard Minimum Design Loads on Buildings and Other Structures." Master's thesis, Virginia Tech, 1998. http://hdl.handle.net/10919/37170.
Full textMaster of Engineering
Hao, Nguyen Anh. "Parallel lamella dome under wind and snow loads." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101117.
Full textM.S.
Naeiji, Amir. "Wind Loads on Residential Rooftop Solar Photovoltaic Panels." FIU Digital Commons, 2017. https://digitalcommons.fiu.edu/etd/3659.
Full textAwad, Ahmed Shawky. "Behavior of FRP chimneys under thermal and wind loads." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ39801.pdf.
Full textBalaramudu, Vasanth Kumar. "Tornado-induced wind loads on a low-rise building." [Ames, Iowa : Iowa State University], 2007.
Find full textZhang, Yu Ph D. Massachusetts Institute of Technology Department of Mechanical Engineering. "Offshore wind turbine nonlinear wave loads and their statistics." Thesis, Massachusetts Institute of Technology, 2019. https://hdl.handle.net/1721.1/122220.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 83-86).
Due to the large influence of lateral flexible vibrations on offshore wind turbine foundations and the higher natural frequencies of the offshore wind turbine foundation relative to the dominant frequencies of the linear wave load model, the modeling of the dynamic behavior of the foundation under nonlinear wave loads and analysis of their statistical characteristics have become an important issue for offshore wind turbine design. This thesis derives an approximate model of the nonlinear wave loads in the time domain by Fluid Impulse Theory, verifies it with a boundary element method software WAMIT and validates it with experimental measurements. The load level crossing rates and the load power spectral density is obtained in multiple sea states. The simulated nonlinear wave loads are applied as the forcing mechanism on the offshore wind turbine and its foundation, and the mudline bending moments are computed and compared with experimental measurements. The system identification is conducted by fitting the model with the experimental data using linear regression method. The analytical extreme and fatigue prediction of the offshore wind turbine system are derived and evaluated in waters of finite depth and in multiple seastates. Key words: Nonlinear wave loads, nonlinear wave loads statistics, system identification, extremes and fatigue
Financial support from MIT-NTNU energy initiative program and Statoil
by Yu Zhang.
Ph. D.
Ph.D. Massachusetts Institute of Technology, Department of Mechanical Engineering
SANS, JIMÉNEZ ALEJANDRO, and LÓPEZ ANTONIO RICARDO BARCELÓ. "Characterisation of Waves and Wind Loads on Floating Bridges." Thesis, KTH, Bro- och stålbyggnad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-267041.
Full textMoussa, Maged Abdel-Ghaffar. "Behaviour of semi-rigid composite connections subject to wind loads." Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240964.
Full textVieira, Cristiano de Castro. "Structural analysis of a wind turbine blade under operational loads." Instituto Tecnológico de Aeronáutica, 2013. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=2860.
Full textJanajreh, Isam Mustafa II. "Wavelet Analysis of Extreme Wind Loads on Low-Rise Structures." Diss., Virginia Tech, 1998. http://hdl.handle.net/10919/30414.
Full textPh. D.
Kazacoks, Romans. "A generic evaluation of loads in horizontal axis wind turbines." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28479.
Full textSchmidt, Sarah Ruth. "Computational and wind tunnel studies of shelterbelts for reduction of wind flow and wind-induced loads on low-rise buildings." [Ames, Iowa : Iowa State University], 2008.
Find full textDagnew, Agerneh. "Computational Evaluation of Wind Loads on Low- and High- Rise Buildings." FIU Digital Commons, 2012. http://digitalcommons.fiu.edu/etd/802.
Full textHabte, Filmon Fesehaye. "Database-Assisted Analysis and Design of Wind Loads on Rigid Buildings." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2573.
Full textBysice, Jason. "In-Situ Measurement of Wind Loads for Roof Edge Metal Configurations." Thesis, Université d'Ottawa / University of Ottawa, 2015. http://hdl.handle.net/10393/33002.
Full textRocha, Daniel. "RELIABILITY OF LIGHT-FRAME WOOD ROOF CONSTRUCTION UNDER EXTREME WIND LOADS." MSSTATE, 2005. http://sun.library.msstate.edu/ETD-db/theses/available/etd-07082005-125227/.
Full textJonkman, Jason Mark. "Dynamics modeling and loads analysis of an offshore floating wind turbine." Connect to online resource, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3284496.
Full textIrtaza, H. "Experimental and computational determination of wind loads on netted/sheeted scaffolds." Thesis, Oxford Brookes University, 2009. https://radar.brookes.ac.uk/radar/items/06628cd5-580a-481d-b557-57e598653394/1/.
Full textDouglas, Mary Keith. "Sensitivity of Steel Purlins to Changes in Application of Wind Loads." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/99140.
Full textMaster of Science
Purlins are roof members used in low rise steel buildings to transmit wind loads applied to the roof of the structure to the frame of the building. This project studied the effects of applying loads to purlins using methods specified by the code compared to those found in a wind tunnel, to look at the similarity of the values and model the actual behavior of the purlins more accurately. For this study, wind tunnel test data obtained from the National Institute of Standards and Technology (NIST) database was applied to the purlins and the shear and moment was calculated. These results were compared to the current code requirements provided in the American Society of Civil Engineers (ASCE) 7 document: Minimum Design Loads and Associated Criteria for Buildings and Other Structures. The results showed that the loads developed in the purlins subjected to wind tunnel test loadings were 3% to 49% higher on the edge of the building than those that had the ASCE 7 design loads applied. More accurately modeling the behavior of the purlins using wind tunnel test data and beam models showed that in locations where the purlins received the maximum wind force, the ASCE 7 requirements for components and cladding tended to be lower than the wind tunnel test data. However, in locations where the purlins were not experiencing the maximum wind force, the ASCE 7 requirements tended to overpredict the loads, based on the use of symmetric high wind areas to design for all wind angles.
Kim, Hongjin. "WAVELET-BASED ADAPTIVE CONTROL OF STRUCTURES UNDER SEISMIC AND WIND LOADS." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1039128747.
Full textGalsworthy, Jon K. "Aspects of across-wind loads and effects on large reinforced concrete chimneys." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ58132.pdf.
Full textHumphreys, Nicholas David. "High cross wind gust loads on ground vehicles from moving model experiments." Thesis, University of Nottingham, 1995. http://eprints.nottingham.ac.uk/11923/.
Full textMohammadi, Mohammad Mehdi. "PREDICTION OF WIND TURBINE BLADE FATIGUE LOADS USING FEED-FORWARD NEURAL NETWORKS." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-444115.
Full textPesmajoglou, Stelianos. "Three-dimensional wake computations applied to horizontal axis wind turbines." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367829.
Full textKayisoglu, Bengi. "Investigation Of Wind Effects On Tall Buildings Through Wind Tunnel Testing." Master's thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613324/index.pdf.
Full textFischer, Tim [Verfasser]. "Mitigation of Aerodynamic and Hydrodynamic Induced Loads of Offshore Wind Turbines / Tim Fischer." Aachen : Shaker, 2012. http://d-nb.info/1052408753/34.
Full textYoung, Michael A. "Effect of open fields on low building wind loads in a suburban environment." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq28694.pdf.
Full textRIOS, MARINA POLONIA. "EFFECT OF DAMPERS ON THE DYNAMIC BEHAVIOUR OF TALL BUILDINGS UNDER WIND LOADS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2015. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=25761@1.
Full textO aumento da altura dos edifícios, aliado ao surgimento de materiais mais resistentes, faz com que as estruturas sejam cada vez mais esbeltas. Com isso, a ação do vento se torna um importante fator a ser considerado nesses projetos. A sua característica dinâmica provoca efeitos de vibração nas estruturas que devem ser analisados, em especial em relação ao conforto do usuário, afetado por deslocamentos e acelerações elevadas. Este estudo aborda a utilização de amortecedores fluidos como forma de reduzir a resposta dinâmica das estruturas submetidas a cargas de vento. A carga de vento consiste em um evento aleatório, devendo ser analisada estatisticamente. Desta forma, foi adotado o Método dos Ventos Sintéticos para definir o carregamento de vento aplicado à estrutura. Os amortecedores empregados na estrutura são fluidos, altamente viscosos, portanto seu comportamento pode ser considerado linear. A avaliação do comportamento da estrutura foi realizada pelo programa computacional Robot Structural Analysis. Foi feita uma análise estática afim de realizar o pré-dimensionamento da estrutura. Em seguida, fez-se uma análise dinâmica para a estrutura submetida ao carregamento de vento, com o objetivo de se analisar a influência dos amortecedores. Foram definidos cinco modelos estruturais, com diferentes configurações de amortecedores, de forma a encontrar a sua melhor distribuição na estrutura para reduzir a resposta a níveis aceitáveis de conforto para os usuários.
With the increase in building height and the development of more resistant materials, structures are becoming more flexible. This has made the consideration of wind loads an important factor to be considered in their projects. The dynamic characteristic of these loads causes important vibration effects in these structures due to their low vibration frequencies, which must be considered in design, especially regarding the users comfort, affected by high displacements and acceleration. This study analyses the use of fluid dampers in order to reduce the dynamic response of the structure under wind loading. The wind load is a random phenomenon, and must be studied statistically. In the present work the Synthetic Wind Method has been adopted in order to generate the variation of the wind load in time. The dampers applied to the structure are fluid dampers, highly viscous, so its behavior can be considered linear. The computer software Robot Structural Analysis is used to study the structural behavior. An analysis considering the wind as an equivalent static load is adopted for the preliminary design. Then, a dynamic analysis is conducted, considering the structure under a time varying wind loading, to investigate the effect of the fluid dampers on the response. Five models are investigated, with different configurations for the dampers, in order to define the best configuration and obtain acceptable levels of displacements and acceleration.
Chan, Godine Kok Yan. "Computation of nonlinear hydrodynamic loads on floating wind turbines using fluid-impulse theory." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/104254.
Full textCataloged from PDF version of thesis.
Includes bibliographical references (pages 199-202).
Wind energy is one of the more viable sources of renewable energy and offshore wind turbines represent a promising technology for the cost effective harvesting of this abundant source of energy. To capture wind energy offshore, horizontal-axis wind turbines can be installed on offshore platforms and the study of hydrodynamic loads on these offshore platforms becomes a critical issue for the design of offshore wind turbine systems. A versatile and efficient hydrodynamics module was developed to evaluate the linear and nonlinear loads on floating wind turbines using a new fluid-impulse formulation - the Fluid Impulse Theory(FIT). The new formulation allows linear and nonlinear loads on floating bodies to be computed in the time domain, and avoids the computationally intensive evaluation of temporal and spatial gradients of the velocity potential in the Bernoulli equation and the discretization of the nonlinear free surface. The module computes linear and nonlinear loads - including hydrostatic, Froude-Krylov, radiation and diffraction, as well as nonlinear effects known to cause ringing, springing and slow-drift loads - directly in the time domain and a stochastic seastate. The accurate evaluation of nonlinear loads by FIT provides an excellent alternative to existing methods for the safe and cost-effective design of offshore floating wind turbines. The time-domain Green function is used to solve the linear and nonlinear free-surface problems and efficient methods are derived for its computation. The body instantaneous wetted surface is approximated by a panel mesh and the discretization of the free surface is circumvented by using the Green function. The evaluation of the nonlinear loads is based on explicit expressions derived by the fluid-impulse theory, which can be computed efficiently.
by Godine Kok Yan Chan.
Ph. D.
Devaney, Louise Claire. "Breaking wave loads and stress analysis of jacket structures supporting offshore wind turbines." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/breaking-wave-loads-and-stress-analysis-of-jacket-structures-supporting-offshore-wind-turbines(acef8efd-eae2-4a52-9513-b2873e7a3a25).html.
Full textMoravej, Mohammadtaghi. "Investigating Scale Effects on Analytical Methods of Predicting Peak Wind Loads on Buildings." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3799.
Full textPapagiannis, Michail. "WIND TURBINE FOUNDATIONS IN CLAY : Technical and economic considerations for proposals for wind turbine foundations." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-353397.
Full textWells, Eric M. "An Assessment of Surface Ice Sheet Loads and Their Effects on an Offshore Wind Turbine Structure." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1345214125.
Full textVasquez, Arango Juan Felipe [Verfasser], Robert [Akademischer Betreuer] Pitz-Paal, and Michael [Akademischer Betreuer] Breuer. "Dynamic wind loads on heliostats / Juan Felipe Vasquez Arango ; Robert Pitz-Paal, Michael Breuer." Aachen : Universitätsbibliothek der RWTH Aachen, 2016. http://d-nb.info/113087172X/34.
Full textChiu, Tak Wai. "Aerodynamic loads on a railway train in a cross-wind at large yaw angles." Thesis, University of Cambridge, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358612.
Full textMazaheri, Said. "Response based analysis of an FPSO due to arbitrary wave, wind and current loads." Thesis, University of Newcastle upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289168.
Full textIvanco, Thomas Glen. "Development and Validation of an Aeroelastic Ground Wind Loads Analysis Tool for Launch Vehicles." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/34462.
Full textMaster of Science
Kumar, Nikhil. "Stress analysis of wood-framed low-rise buildings under wind loads due to tornados." [Ames, Iowa : Iowa State University], 2008.
Find full textSivapathasundaram, Mayooran. "Localised pull-through failures of thin steel roof battens subject to wind uplift loads." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/204638/1/Mayooran_Sivapathasundaram_Thesis.pdf.
Full textGiles, Tyler Eric. "Ductile Design and Predicted Inelastic Response of Steel Moment Frame Buildings for Extreme Wind Loads." BYU ScholarsArchive, 2021. https://scholarsarchive.byu.edu/etd/9161.
Full textWijesooriya, Kasun Danushka. "An Uncoupled Fluid-Structure Interaction Numerical Framework to Estimate Wind Induced Loads on Super-tall Structures." Thesis, University of Sydney, 2021. https://hdl.handle.net/2123/24515.
Full textTian, Lin. "Analysis of Time-Varying Characteristics of Simulated Turbulence in Wind Tunnel." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/33717.
Full textMaster of Science
LAI, RONG-YI, and 賴融毅. "Wind loads on parallel latticed frames." Thesis, 1988. http://ndltd.ncl.edu.tw/handle/58808570056977217520.
Full textHuang, Hsin-Ta, and 黃新達. "Uncertainty Analysis of Along-wind and Across-wind Loads for Buildings." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/00529374312882756499.
Full text國立台灣工業技術學院
營建工程技術研究所
85
This research presents a comparative study of current methods for calculation of along-wind and across-wind design wind loads. The methods considered are based on the codes of several countries and the results of wind tunnel tests (ANSI, 1982;SAA, 1989;NBCC, 1990;AIJ, 1996;R an, 1996;Islam, 1988) . The adopted wind loads are the along-wind load in Taiwan (1996) and the across-wind load in AIJ (Architectural Institute of Japan,1996). The combined scalar wind load effect is the maximum of the sum of the along-wind load process and across-wind load process, and can be approximated by a SRSS rule. Its probability distribution is derived by Monte Carlo simulations, considering alluncertainties. The obtained results will be the basis for evaluating the associated load factors and resistance factors.
Fu, Chung Lin, and 傅仲麟. "Wind Tunnel Investigations of Torsional Wind Loads Acting on Rectangular Prisms." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/42956006373303696659.
Full text淡江大學
土木工程學系
85
Due to slenderness and less rigidity of modern building, wind loads become the dominate lateral force for highrise building design . The fluctuating wind loads acting on hig-rise building consist of drag force , periodic acrosswind force due to vortex shedding and torsional force due to load asymmetry. The paper studies torsional force on a rectangular prism with various cross sectional length -to-width ratio in two simulated atmospheric boundary layer flows .The experiments were performed by a new pressure-measured system. Through this system ,pressures at four side of rectangular prisms can be measured simultaneously, and then relationship between torsion and drag force ,lift force can be obtained. The results indicate that torsion will increase with length -to- width ratio .when length - to-width ratio less then critical value , 70%~90% of torque comes from asymmetries pressure distributions on the leeward side . If length -to-width ratio greater then critical value ,50%~90% of torque comes from the side face ,,the contributions increase with length -to-width ratio. The contributions to the torque from the two half forces of each side are opposite to each other and tend to cancel out .Therefore , the vortex shedding peak in the pressure spectrum on side face doesn''t appear in the torque spectrum .However , the contributions to the torque from the two leeward half faces are the same , the effects tend to add up .So the vortex shedding peak will appear in the torque spectrum .
Baskaran, Appupillai. "Wind loads on flat roofs with parapets." Thesis, 1986. http://spectrum.library.concordia.ca/5556/1/ML30609.pdf.
Full text