Flangeless wind tower
First Claim
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1. A wind turbine tower comprising:
- a plurality of tubular sections, wherein each tubular section of the plurality of tubular sections includes substantially planar end surfaces defining an intercan gap between adjacent tubular sections, the intercan gap being limited to a predetermined value promoting tower stiffness;
a plurality of flangeless joints, wherein each individual flangeless joint is arranged between opposing end surfaces of adjacent tubular sections;
a plurality of fingerplate assemblies uniformly distributed around a periphery of each flangeless joint, wherein each fingerplate includes a circumferential angle, a longitudinal dimension, and a radial thickness; and
a coverplate attached within a top end of a top tubular section of the plurality of tubular sections, the coverplate defining a radius substantially equal to an inner radius of the top tubular section, the coverplate being formed from a material having a higher Young'"'"'s modulus than a Young'"'"'s modulus for a material used to form each of the plurality of fingerplate assemblies.
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Abstract
A method for stiffening a wind turbine tower employing fingerplate assemblies on flangeless joints between adjacent tubular tower sections. The method includes limiting the intercan gap between adjacent end surfaces of the tower sections at the flangeless joints and selecting a number of fingerplates to fasten each flangeless joints to limit distortion. Establishing dimensions for the fingerplates may further minimize localized tower distortion. Selecting a material for the fingerplate with a lower Young'"'"'s modulus than a material for the tubular section also results in reduced localized tower distortion. Attaching a coverplate to a top tubular section limits tip displacement for the tower.
40 Citations
17 Claims
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1. A wind turbine tower comprising:
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a plurality of tubular sections, wherein each tubular section of the plurality of tubular sections includes substantially planar end surfaces defining an intercan gap between adjacent tubular sections, the intercan gap being limited to a predetermined value promoting tower stiffness; a plurality of flangeless joints, wherein each individual flangeless joint is arranged between opposing end surfaces of adjacent tubular sections; a plurality of fingerplate assemblies uniformly distributed around a periphery of each flangeless joint, wherein each fingerplate includes a circumferential angle, a longitudinal dimension, and a radial thickness; and a coverplate attached within a top end of a top tubular section of the plurality of tubular sections, the coverplate defining a radius substantially equal to an inner radius of the top tubular section, the coverplate being formed from a material having a higher Young'"'"'s modulus than a Young'"'"'s modulus for a material used to form each of the plurality of fingerplate assemblies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wind turbine tower comprising:
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a plurality of tubular sections, wherein each tubular section of the plurality of tubular sections includes substantially planar end surfaces forming an intercan gap between adjacent tubular sections, the intercan gap being limited to a predetermined value promoting tower stiffness; a plurality of flangeless joints, wherein each individual flangeless joint is arranged between opposing end surfaces of adjacent tubular sections; a plurality of fingerplate assemblies uniformly distributed around a periphery of each flangeless joint, each of the plurality of the fingerplate assemblies including a circumferential angle, a longitudinal length and a radial thickness, each of the plurality of fingerplate assemblies being formed from a material with a Young'"'"'s modulus lower than a Young'"'"'s modulus for a material used to form each of the plurality of tubular section; and a coverplate attached within a top end of a top tubular section of the plurality of tubular sections, the coverplate defining a radius substantially equal to an inner radius of the top tubular section, wherein the coverplate is formed from a material with a high Young'"'"'s modulus relative to the Young'"'"'s modulus for the material used to form each of the plurality of fingerplate assemblies.
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Specification