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Lamination optimum design method of wind turbine blade main beam

A wind turbine blade and optimization design technology, applied in computing, special data processing applications, instruments, etc., can solve the problems of increasing its own weight, dragging down the operating efficiency of the wind turbine, increasing the cost of blades, etc., and achieving the effect of reducing the weight of the blades

Inactive Publication Date: 2016-07-13
LANZHOU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Megawatt wind turbines usually operate in a complex and changeable environment. The blades are subjected to aerodynamic loads, centrifugal loads, and gravity loads. The increase in blade size will lead to an increase in its own weight, which not only increases the cost of the blades but also drags down the wind power. machine operating efficiency

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  • Lamination optimum design method of wind turbine blade main beam
  • Lamination optimum design method of wind turbine blade main beam
  • Lamination optimum design method of wind turbine blade main beam

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Embodiment Construction

[0039] The present invention adopts following technical scheme:

[0040] The first step is to select the appropriate aerodynamic shape parameters, divide the blades equidistantly into n segments to obtain your cross-section, and calculate the area of ​​each section given the initial main beam lay-up thickness parameters;

[0041] The second step is to calculate the section area moment S x ,S y , centroid X c ,Y c , and moment of inertia I x , I y , I xy ;

[0042] The third step is to calculate the bending moment and torque of the aerodynamic force, gravity and centrifugal force on the blade;

[0043] The fourth step is to calculate the linear density of the blade mass as the fitness value and the stiffness of a given layer thickness, and compare it with the maximum stress to eliminate the layer thickness that does not meet the requirements.

[0044] The fifth step is to obtain the optimization result by iterating a certain number of steps and select the optimal value ...

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Abstract

The invention discloses a lamination optimum design method of a wind turbine blade main beam. The method comprises blade structure analysis: simplifying a blade into cantilever beam based on a beam and casing theory, and computing the blade sectional properties, load internal force, stress-strain and blade lamination thickness according to given blade parameters; genetic algorithm optimization: performing optimum design of wind turbine blade lamination thicknesses, determining lamination thickness of the blade in different positions by taking the minimum mass of the blade as a target according to the rigidity and the strength of the wind turbine blade. The method, aiming at specific environment, computes the lamination thickness of the blade through a written optimum design program. A computed result shows that the mass of the blade is reduced in the condition that the rigidity and strength of the blade are met, and an optimum model has practicability and effectiveness.

Description

technical field [0001] The invention relates to a large wind turbine blade, in particular to an optimal design method for the ply thickness of the main girder of the wind turbine blade. Background technique [0002] The problem of global warming is becoming more and more serious, and renewable clean energy has attracted much attention. Wind energy, as an available green energy, has great prospects for development. The effective use of wind energy depends on wind turbines. As a device for directly capturing wind energy, wind turbine blades are an important part of wind turbines. The trend of wind turbines is towards large-scale development. Although the increase of the blades can increase the power of the wind turbine, it will also bring a lot of structural burdens, the weight of the blades will increase, and the force on the blades will increase. These changes will bring a series of effects, so the structural design of wind turbine blades is very important for blade desig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/17G06F2113/28
Inventor 郑玉巧赵荣珍曹永勇叶舟
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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