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Numerical Solution of Partial Differential Equations in Random Domains:An Application to wind engineering

Communications in Computational Physics 2009年第2期5卷 515-531页

作者： Claudio Canuto Davide Fransos Dipartimento di Matematica Politecnico di TorinoC.so Duca degli Abruzzi 2410129 TorinoItaly

An application of recent uncertainty quantification techniques to wind engineering is *** particular,the study of the effects of small geometric changes in the Sunshine Skyway Bridge deck on its aerodynamic behavior is *** results in the numerical solution of a proper PDE posed in a domain affected by randomness,which is handled through a mapping approach.A non-intrusive Polynomial Chaos expansion allows to transform the stochastic problem into a deterministic one,in which a commercial code is used as a black-box for the solution of a number of Reynolds-Averaged Navier-Stokes *** use of proper Gauss-Patterson nested quadrature formulas with respect to a Truncated Weibull probability density function permits to limit the number of these computationally expensive simulations,though maintaining a sufficient *** Chaos approximations,statistical moments and probability density functions of time-independent quantities of interest for the engineering applications are obtained.

关键词： Uncertainty quantification stochastic partial differential equations random domains mapping approach polynomial chaos wind engineering

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Numerical Tools Dedicated to wind engineering in Large Urban Area

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World Journal of engineering and Technology 2016年第3期4卷 22-29页

作者： Li Wang Sophie Puygrenier Guillaume Caniot Stéphane Sanquer Didier Delaunay Meteodyn Meteorology and Dynamics Technology Beijing China Meteodyn Nantes France

This paper presents a global methodology to compute wind flow in complex urban areas in order to assess wind pedestrian comfort, wind energy, wind safety or natural ventilation potential. The numerical tool presented here is composed of a CFD soft-ware suite covering both regional scale (20 km) and urban scale (1km), and able to model the wind in any complex terrains and in large urban environments. Examples are presented in the paper in order to show the advantages of the methodology for urban designers.

关键词： wind engineering Urban Area wind Design wind Safety Comfort Sustainable De-velopment

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A novel forced motion apparatus with potential applications in structural engineering

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Journal of Zhejiang University-Science A(Applied Physics & engineering) 2020年第7期21卷 593-608页

作者： Lin ZHAO Xi XIE Yan-yan ZHAN Wei CUI Yao-jun GE Zheng-chun XIA Sheng-qiao XU Min ZENG Stale Key Laboratory of Disaster Reduction in Civil engineering Tongji UniversityShanghai 200092China Key Laboratory of Transport Industry of wind Resistant Technology for Bridge Structures Tongji UniversityShanghai 200092China China Railway Siyuan Survey and Design Group Co.Ltd. Wuhan 430063China China Railway engineering Design and Consulting Group Beijing 100055China

This paper reviews the development of forced motion apparatuses(FMAs) and their applications in wind engineering. A kind of FMA has been developed to investigate nonlinear and nonstationary aerodynamic forces considering the coupled effects of multiple degrees of freedom(DOFs). This apparatus can make section models to vibrate in a prescribed displacement defined by a numerical signal in time domain, including stationary and nonstationary movements with time-variant amplitudes and frequencies and even stochastic displacements. A series of validation tests show that the apparatus can re-illustrate various motions with enough precision in 3 D coupled states of two linear displacements and one torsional displacement. To meet the requirement of aerodynamic modeling, the flutter derivatives of a box girder section are identified, verifying its accuracy and feasibility by comparing with previously reported results. By simulating the nonstationary vibration with time-variant amplitude, the phenomena of frequency multiplication and memory effects are examined. In addition to studying the aerodynamics of a bluff body under large amplitudes and nonstationary vibrations, some potential applications of the proposed FMA are discussed in vehicle-bridge-wind dynamic analysis, pile-soil interaction, and line-tower coupled vibration aerodynamics in structural engineering.

关键词： Forced motion apparatus(FMA) Coupled vibration Stochastic vibration simulation Aerodynamic force Frequency multiplication Memory effects wind engineering Potential applications

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Flight Vehicle Performance and Aerodynamic Control

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丛书名： AIAA Education Series

2001年

作者： Frederick O. Smetana

ISBN: (数字)9781600861857

ISBN: (纸本)9781563474637

Flight Vehicle Performance and Aerodynamic Control is designed to serve as a text for either an 11-week or a 16-week course at the sophomore level. It explains typical methods used to estimate aircraft performance, the theoretical basis of these methods, and how various parameters derived from the aircraft geometry can be used to estimate the requirements of control surfaces and the aerodynamic forces required to actuate these surfaces. This book includes time-tested computer programs that perform the analyses in a manner that reduces student error and improves result accuracy. Because the source code is given, users with a FORTRAN compiler can modify the program to suit particular needs. The major advantage of the software is that more realistic problems may be treated and the effects of parametric programs are more accurate than calculators. The programs are available as executables for windows machines as well as in ASCII source code versions that can be readily compiled and then executed on Unix, Linux, and Macintosh machines, and on mainframes.

关键词： Aerodynamic Performance Aerodynamics Aeronautical engineering Aeronautics Aerospace engineering Aerospace Sciences Aircraft Carriers Aircraft Components and Structure Aircraft Conceptual Design Aircraft Design Aircraft Dynamic Modes Aircraft Engines Aircraft Instruments Aircraft Operations Aircraft Operations and Technology Aircraft Performance Aircraft Stability and Control Aircraft Stabilizer Aircraft Wing Components Aircraft Wing Design Aircrafts Airfoil Airfoil Nomenclature Airspeed Astrodynamics Astronautics Atmospheric Science Aviation Aviation Authorities and Organizations Aviation Safety Avionics Civil Aviation Combat Aircraft Combustion Chambers Compressors Energy Energy Conversion Energy Economics Energy Forms Energy Forms, Production and Conversion Energy Production Fixed-Wing Aircraft Flight Control Surfaces Flight Dynamics Flight Mechanics Flight Test Flight Training Fluid Dynamics Fluid Flow Properties Fluid Mechanics Fossil Fuels Fuel Injection Fuels Gas Turbine Guidance, Navigation, and Control Systems Heat Engines Helicopters Hydraulics Hydrodynamics Ignition Systems Jet Aircraft Liquid Fuels Longitudinal Static Stability Military Airbases Military Aircraft Military Aviation Non-Renewable Energy Petroleum Power Station Propulsion and Power Reciprocating Engine Rocket Engine Rocketry Rotorcrafts Sensors Short Takeoff and Landing Takeoff and Landing Transducers Turbines Turbomachinery Unmanned Aerial Vehicle wind engineering wind Tunnels wind Turbine Wing Configurations Wing Planforms

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An Insider’s View to Burj Dubai-the Design of the World’s Tallest Building

An Insider’s View to Burj Dubai-the Design of the World’s ...

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2009中国上海国际建筑科技大会

作者： William F.Baker James J.Pawlikowski Skidmore Owings ＆ Merrill LLPChicagoUSA

＜正＞The goal of the Burj Dubai Tower is not simply to be the world’s highest building;it’s to embody the world’s highest *** project represents the collaboration of literally thousands of people from across the globe,all striving to build a structure which pushes the limits of our current technology in order to create something never before *** paper will provide an overview of the features of the world’s tallest building,as well as the challenges faced in designing this unique and unprecedented structure.

关键词： wind engineering buttressed core high performance concrete

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