A correction method for static test results of horizontal axis wind turbine blades

Abstract

The invention discloses a method that combination of a test and calculation is utilized, and structure performance evaluation of a horizontal shaft wind turbine blade is carried out under the static force loading function. Compared with the existing method that performance evaluation is carried out by only using a blade test-bed static force test, the static force test result correcting method is capable of accurately estimating showed structural responses when limit load or other static load is borne in operation. The static force test result correcting method is composed of the following parts: static force of the blade on a test test-bed, numerical simulation during the process of a test-bed static force test; correlation analysis of the test and the calculation, impact analysis of centrifugal load to blade structure responses under the actual operating conditions, correction of impacts to test results. Due to the fact that the impact analysis of the centrifugal load to the blade structure responses is introduced by the static force test result correcting method, and correction is carried out on the test, and the shortage that impacts of the centrifugal load to the blade structure responses can not be reflected by the test-bed static force test can be made up, and accuracy of the structure performance evaluation is improved.

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 evaluating the structural performance of a horizontal axis wind turbine blade under static load. 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 damage and failure of wind turbine blades under extreme 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...

AI Technical Summary

Problems solved by technology

[0008] The static tests carried out on the wind turbine blades on the test bench are difficult to truly reflect the structural response of the blades under actual operating conditions, cannot reflect the effects of centrifugal loads, and cannot accurately predict the ultimate load or other static loads of the blades. In response to this problem, the present invention proposes a method for evaluating the structural performance of horizontal axis wind turbine blades under static loads by combining test and calculation. Relevant corrections are made to the force test results to achieve the purpose of simulating and evaluating the structural response of the blade operating environment under the action of ultimate load or other static loads, so that the impact of centrifugal load on the structural response can be considered more accurately before the blade is put into operation , so as to ensure that the blade is in a safe and reasonable deformation and stress / strain under operating conditions, and ensure the safe operation of the blade and the unit. This method can improve the judgment accuracy of the actual structural response of the blade on the premise of ensuring low detection costs