The gust factor approach to evaluate the along-wind response of structures to wind excitation

发布时间 :2017-03-10 


报告人:Professor Richard George James Flay, BE(Hons), PhD, FIMechE, FIPENZ, FRINA, MASME

        Director, Yacht Research Unit

        President, Royal Institution of Naval Architects (NZ Division)

        Chair, 9th Asia Pacific Conference on Wind Engineering, Auckland, December, 2017

        Mechanical Engineering, Faculty of Engineering

        The University of Auckland

        New Zealand


 The gust factor approach to evaluate the along-wind response of structures to wind excitation

摘  要:This chapter describes a relatively well-developed method for determining the along-wind response of tall buildings to wind excitation using a theoretical approach. It has been found to give good predictions, and is now the basis of along-wind response predictions in some wind loading standards and codes. It is based on the premise that the along-wind motion of a relatively slender building is driven primarily by the onset turbulence, which excites the building as a single degree of freedom system with low damping.

 间:2017年3月10号 14:30-16:30



Introduction of the Speaker


Professor Flay studied Mechanical Engineering at the University of Canterbury, graduating BE (Mech) with 1st Class Honours in 1975. He then registered for his PhD at the same university and graduated in 1979 with a PhD in Wind Engineering. This was followed by a period of two years as a National Research Council Visiting Fellow at the Atmospheric Environment Service, Environment Canada, Toronto, where he worked with Dr Hans Teunissen, carrying out research in wind engineering using a Boundary Layer Wind Tunnel. He then moved to a consulting company in Toronto for a period of four years, where he was employed as an Aerodynamic Design engineer, and carried out design work on many different kinds of wind tunnels, both subsonic and supersonic.


Since returning to New Zealand, Professor Flay joined the Mechanical Engineering Department in 1984 as a senior lecturer. He has been Professor of Mechanical Engineering since 2000. He is Director of the Yacht Research Unit, President of the Royal Institution of Naval Architects (NZ Division), and Chair of the 9th Asia Pacific Conference on Wind Engineering to be held in Auckland in December 2017.


His research interests are focused on the wind, and he has consulted and researched in the areas of wind engineering, wind energy, wind tunnel design, wind tunnel testing and sail aerodynamics. A highlight was his design of the world’s first wind tunnel capable of producing twisted flow for testing yacht sails. This wind tunnel was used by Team New Zealand, and helped them win the America’s Cup in 1995 and successfully defend it in 2000. More recently he has advised on the design of wind tunnels in England, Hong Kong, Australia, India and New Zealand. His main teaching areas are fluid mechanics, thermodynamics, aerodynamics, design, wind engineering and yacht engineering.


In 2015 the Wind Engineering Research Group moved to a new campus at Newmarket in Auckland, and Prof. Flay designed a large Boundary Layer Wind Tunnel with a test section 20 m long x 3.6 m wide x 2.5 m high which was completed in June 2015.The wind tunnel is used for teaching, research and commercial testing. Wind engineering studies are carried out in this wind tunnel using a 512-channel electronically scanned pressure system, several JR3 high frequency force balances, and pedestrian level wind investigations using Irwin probes and the erosion technique. The wind tunnel is also used for cycle aerodynamic drag testing and vehicle testing with a moving ground-plane under the model vehicle.


Professor Flay’s more recent research has concentrated on wind flows over complex terrain, modelling wind loads on bridges, sail aerodynamics, turbine blade loading, loads on large roofs, extreme wind speeds for wind loading design in New Zealand, and the aerodynamics of buoyancy vortices in the atmosphere.



You are all welcome!

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