Wind Turbine Blade Vibration Control Method Using Composite Damping Structure

A technology of wind turbine blades and composite damping, which is applied in wind turbines, engines, wind power generation, etc. It can solve the problems of lack of prevention and control methods, and the flutter of large flexible blades of wind turbines is easy to occur, so as to achieve good vibration suppression performance and improve aerodynamic stability Sexuality, the effect of increasing production costs

Active Publication Date: 2016-03-02
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] In order to solve the problem that large flexible blades of wind turbines are prone to flutter and lack effective prevention and control methods, the present invention provides a method for suppressing flutter of wind turbine blades using a composite damping structure

Method used

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  • Wind Turbine Blade Vibration Control Method Using Composite Damping Structure

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Embodiment 1

[0055] Take a certain 2500kW wind turbine as an example. The wind turbine is mainly used in offshore wind farms. Its design power is 2.5MW and it adopts three-blade form. The material of the leaf skin is GRP. The main design parameters are shown in Table 1.

[0056] Table 1 Main Design Parameters

[0057]

[0058] (1) airfoil selection

[0059] According to the design requirements, the NACA6413 airfoil is selected for all blades, which has a large lift-to-drag ratio and good stall performance.

[0060] (2) Damping structure

[0061] Composite materials, damping materials, and co-cured constrained damping layer structure of composite materials are used; I-beam steel beams are used for the main beam, and the free damping layer is treated, that is, the damping material is pasted on the web of the main beam with epoxy resin. Epoxy viscoelastic material (SMRD100F50) is selected as the damping material, and its loss factor β =0.89, and can withstand the temperature of 120°C ...

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Abstract

The invention is specifically a method for suppressing flutter of wind turbine blades using a composite damping structure, which solves the problem that large flexible blades are prone to flutter and lack effective prevention and control methods. The vibration suppression method of wind turbine blades using a composite damping structure is specifically to set a co-cured constrained damping layer on the surface of the blade, and set a free damping layer on the outer surface of the main beam; the free damping layer is composed of a single layer of damping material, and the damping viscoelastic material or Damping alloy or damping composite material; the co-cured constrained damping layer is co-cured and formed by the interstitial arrangement of the composite material layer and the damping material layer. Choose damping viscoelastic material. Compared with the prior art, the present invention has universal applicability, effective tremor suppression, economy and designability.

Description

technical field [0001] The invention relates to the technical field of wind power generation, in particular to a vibration suppression method for wind turbine blades using a composite damping structure. Background technique [0002] As environmental issues are getting more and more attention, clean energy has gradually become the mainstream of world energy development. As a renewable clean energy, wind energy has developed rapidly in recent years, and MW-level wind turbines have become the mainstream models of wind turbines. In order to meet the high power output requirements of wind turbines, wind turbine blades are becoming larger and thinner (for example, the length of a single blade produced by a foreign company has reached 55 meters). Large slender blades flutter under complex loads of aerodynamic force, elastic force and inertial force, and the main flutter forms are edgwise vibration and flapwise vibration. The fluttering of the blades not only reduces the power out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03D80/00
CPCY02E10/72
Inventor 孙大刚李占龙韩斌慧章新宋勇
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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