摘要:
A method for detecting a damage of a wind turbine blade of a wind turbine rotor including a plurality of wind turbine blades includes: a strain data acquiring step of acquiring strain data representing strain of each of the plurality of wind turbine blades; a difference calculation step of calculating a difference between the strain data of a detection target wind turbine blade which is one of the wind turbine blades and a reference value reflecting the strain data of at least one comparison target wind turbine blade of other wind turbine blades; and a detection step of detecting the damage of the detection target wind turbine blade based on a trend of the difference calculated in the difference calculation step.
摘要:
It is intended to provide a method and an apparatus for manufacturing a fiber-reinforced base material, which is capable of manufacturing a fiber-reinforced base material of high quality while preventing generation of defects such as wrinkles during stacking of the base material sheet. The method for manufacturing the fiber-reinforced base material formed by stacking a base material sheet including a reinforcement fiber onto a mold having a double-curved surface shape, includes steps of: supplying the base material sheet onto the mold from a base material roll while applying distribution varying in a width direction (X direction) to a length of the base material sheet in a sheet-supplying direction of the base material sheet (Y direction) in correspondence with the double-curved surface shape of the mold; and applying pressure to the base material sheet in contact with the mold.
摘要:
A wind turbine blade used in a wind power generator that receives wind and rotates a rotating shaft of a generator includes at least two layers on a surface of a blade body, one of the layers being colored with a coating material different in color from the blade body and the rest of the layers. The layers are provided at least on a tip, particularly at a front edge of the wind turbine blade. A wind turbine blade monitoring system that monitors the wind turbine blade includes: an imaging unit that images the wind turbine blade in a predetermined position over a predetermined period at timing when the wind turbine blade passes through the predetermined position; and an indication unit that chronologically indicates imaging results of the wind turbine blade imaged by the imaging means.
摘要:
A method of detecting a damage of a wind turbine blade of a wind turbine rotor includes: a light input step of inputting light into a fiber-optic sensor mounted to the wind turbine blade; a light detection step of detecting reflection light from the grating portion; an obtaining step of obtaining a wavelength fluctuation index representing a fluctuation amount of a wavelength of the reflection light detected in the light detection step; and a detection step. The detection step includes detecting the presence or the absence of the damage of the wind turbine blade based on the wavelength fluctuation index taking account of a correlation between the wavelength fluctuation index of the wind turbine blade and a load index related to a load applied to the wind turbine blade, or a correlation between the wavelength fluctuation index and a temperature index related to a temperature of the wind turbine blade.
摘要:
A wind turbine blade is reinforced while suppressing possible stress concentration resulting from a load imposed on a blade root portion of the wind turbine blade in a flap direction. The wind turbine blade includes a blade main body extending from the blade root portion toward a blade tip portion and an FRP reinforcing layer formed so as to cover at least a part of the outer surface of the blade root portion of the blade main body. The FRP reinforcing layer includes a plurality of laminated fiber layers and a resin with which the plurality of fiber layers is impregnated. The FRP reinforcing layer is formed such that, in a cross section along a longitudinal direction of the blade main body, both ends of the plurality of laminated fiber layers in the longitudinal direction are tapered.
摘要:
A wind turbine blade is reinforced while suppressing possible stress concentration resulting from a load imposed on a blade root portion of the wind turbine blade in a flap direction. The wind turbine blade includes a blade main body extending from the blade root portion toward a blade tip portion and an FRP reinforcing layer formed so as to cover at least a part of the outer surface of the blade root portion of the blade main body. The FRP reinforcing layer includes a plurality of laminated fiber layers and a resin with which the plurality of fiber layers is impregnated. The FRP reinforcing layer is formed such that, in a cross section along a longitudinal direction of the blade main body, both ends of the plurality of laminated fiber layers in the longitudinal direction are tapered.
摘要:
Provided are a wind turbine blade, with which effective reinforcement against possible flexural deformation in a longitudinal direction is realized, and a reinforcing method for the wind turbine blade. The wind turbine blade includes a hollow blade main body having a cylindrical blade root portion and extending from the blade root portion along a blade length direction, and a reinforcing plate provided in contact with an inside surface of the blade root portion and formed of an elongated member having a dimension along the blade length direction that is larger than a dimension along a circumferential direction of the blade root portion.
摘要:
An anti-wear sheet for improving anti-wear performance of an object to be protected includes: a release film; a resin layer disposed on the release film and including photo-curable resin and hard particles supported by the photo-curable resin; and a light-shielding film disposed on an opposite side of the resin layer from the release film.
摘要:
A method for detecting damage of a wind turbine blade of a wind turbine rotor having at least one wind turbine blade comprises: a light incident step of allowing light to enter an optical fiber sensor being mounted on each of the wind turbine blade and having a diffraction grating part having a refractive index which is periodically varied in a longitudinal direction of the diffraction grating part; a light detection step of detecting reflected light from the diffraction grating part; an obtaining step of obtaining, from a temporal change of a wavelength of the reflected light received in the light receiving step, a wavelength variation index representing a variation amount of the wavelength; and a damage determination step of determining presence or absence of a damage of the wind turbine blade on the basis of the wavelength variation index calculated in the obtaining step.