Fatigue test method of blade scaling model of horizontal axis wind turbine based on equal-service-life principle
A wind turbine blade and fatigue testing technology, which is applied in the testing of mechanical parts, the testing of machine/structural parts, measuring devices, etc., can solve the problems of long cycle and high cost of experimental blade production and testing, and achieve low cost and short cycle. , The effect of equipment investment economy
Active Publication Date: 2015-04-22
INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0004] However, most of the current blade fatigue test methods are full-scale blade tests, and the production and test cycles of the test blades are very long, and most of them are carried out with large-scale test equipment, which is very expensive
Method used
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Experimental program
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Embodiment Construction
[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific examples.
[0038] In this embodiment, taking the current mainstream MW-level wind turbine blades as an example, the following steps are used for detection:
[0039] 1) According to the structural characteristics of the prototype blade to be tested and evaluated, design and manufacture a blade whose structural size is reduced in proportion, and use this blade as the test blade. In this example, the reduction ratio is taken as 10;
[0040] 2) According to the principle of equal life, (that is, the reduced-scale model blade and the prototype blade should maintain the same structural damage and life distribution under their respective test loads), the test load of the prototype blade is converted into the test load of the reduced-scale model blade . The steps are as follows:
[0041] (a...
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The invention discloses a fatigue test method of a blade scaling model of a horizontal axis wind turbine, which aims at using the test detection and calculation analyzing method of the scaling model with low cost and high efficiency to replace the full-size blade fatigue test. The method is characterized in that the blade model fatigue test with size equal-scale reduction is used for replacing the traditional full-size blade fatigue test, and on the premise of the scaling model and a prototype blade meeting the equal-service-life requirement, the blade model fatigue test is used for determining the test load of the scaling model. The test method has the advantages that existing blade fatigue test equipment in the industry can be adopted, a miniature test device and equipment with low cost can also be adopted, so as to carry out fatigue test; and through the accurate design and analysis, the scaling model and the full-size blade are ensured to have a relatively accurate structure size corresponding relationship and a relatively accurate load corresponding relationship, so the accuracy of test results is ensured.
Description
technical field [0001] The invention relates to the technical field of wind power generation in the mechanical industry, in particular to a method for testing and evaluating the structural performance of a horizontal axis wind turbine blade under fatigue load. Background technique [0002] The damage and failure of wind turbine blades under fatigue load is an important concern 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. In such a long service period and harsh working environment, wind turbines often have to operate under various fatigue loads, which seriously affects the reliability and service life of wind turbines in safe operation. However, the harsh working environment, special material properties, and various problems caused by structure and technology bring considerable difficulty to the performance evaluation of the blade...
Claims
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IPC IPC(8): G01M13/00
Inventor 石可重赵晓路
Owner INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI