کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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292576 | 510938 | 2011 | 11 صفحه PDF | دانلود رایگان |
This paper presents a novel application of galloping to the design of a kinetic sculpture intended to represent the shape and motion of dune grass. This 35 m sculpture will consist of a flexible composite mast with an elliptical profile head, deliberately designed to generate slow but large-amplitude cross-wind galloping oscillations. The galloping characteristics of triangular, triform and cruciform head cross-sections have been investigated using static and dynamic wind tunnel tests, and modelled successfully using a simple energy balance method. The effect of yaw angle on galloping of three-dimensional shapes is much more significant than for 2D prisms, with the formation of leading-edge vortices from the swept edges tending to suppress galloping. This results in a desirable ‘self-furling’ feature, with the sculpture ceasing to move in high winds as the mast bands backwards. A full scale prototype has been successfully tested, in advance of the installation of a group of six Dune Grass sculptures on the sea front at Blackpool.
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 99, Issue 9, September 2011, Pages 908–918