Method for correcting blade modal testing result of horizontal axis wind turbine

A technology for wind turbine blade and modal testing, which is used in the testing of mechanical components, the testing of machine/structural components, and measuring devices, etc., which can solve the problem that the requirements for safe operation of blades and units cannot be met, and the natural frequency of blades cannot be accurately estimated. problems, to achieve the effect of reducing inspection costs, optimizing design, and improving accuracy

Active Publication Date: 2012-07-11
中科国风科技有限公司
View PDF2 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the actual natural frequency of the blade cannot be accurately estimated solely by the test on the test bench
[0006] Since the natural frequency of the blade is an important factor affec

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for correcting blade modal testing result of horizontal axis wind turbine
  • Method for correcting blade modal testing result of horizontal axis wind turbine
  • Method for correcting blade modal testing result of horizontal axis wind turbine

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0032] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments.

[0033] The object of this embodiment is a 1.5MW wind turbine, and the rotational speed of the wind rotor is in the range of 11-19 rpm under the operating condition of the unit. Because the torsional stiffness of the blade is high and the torsional frequency is in a safe range, this example only analyzes the modal modes in the flapping and swaying directions. The following steps are used to test the blade structure frequency and correct the results. For the convenience of description, in this example, the load The effect on frequency is analyzed only for the effect of inertial loads:

[0034] 1) Fix the blade on the test bench, determine the layout of the blade surface sensor according to the characteristics of the different modes of the blade, and use the environmen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for correcting a blade modal testing result of a horizontal axis wind turbine. The method comprises the following steps of: testing a modal parameter of a static blade fixed on a test-bed; simulating a test environment, and performing blade modal assessment by using a value simulation method; comparing tests and computing to perfect a computed result; according to the influence of various loads on dynamic frequency under the actual operating condition of the blade, performing frequency computation correction to obtain a proportional relation of frequency values under static and operating conditions; and correcting the blade modal test result according to the proportional relation to obtain the natural frequency of the blade under the operating condition. By the method, an aim of obtaining a dynamic structure frequency parameter of the blade under the operating condition without direct modal measurement of the blade of an operating unit can be fulfilled, and an effective and economic dynamic performance evaluating method is provided for designing, researching and developing and detecting the blade.

Description

technical field [0001] The invention relates to the technical field of wind power generation in the mechanical industry, in particular to a modal test method for a horizontal axis wind turbine blade. Background technique [0002] The strategic position of wind energy as an important part of future energy supply has been widely valued by countries all over the world. my country has abundant reserves of wind energy resources. From a macro perspective, my country has the resource conditions for large-scale development of wind power generation. [0003] The dynamic characteristics of wind turbine blades are an important indicator in the design, manufacture and operation of wind turbine blades. In the design of wind power blades, it is generally required that the wind power blades can meet the service life of 20 years. Under long-term operation, wind turbines are subjected to various complex loads, especially various steady or unsteady dynamic loads, which seriously affect the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M13/00
Inventor 石可重徐建中
Owner 中科国风科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap