Application and research of finite difference method in static testing of large wind turbine blades

doi:10.19936/j.cnki.2096-8000.20250928.012

Abstract

Abstract: In order to design a full-size static loading scheme for wind turbine blades more quickly and conveniently, this paper proposes a static loading method based on finite difference method for iterative calculation. Firstly, simplify the blade into a cantilever beam model with variable cross-section; secondly, based on the approximate differential equation of the deflection curve of the cantilever beam, the finite difference method is used to iteratively calculate the final deformation of the blade by correcting the cross-sectional bending moment according to the geometric shape of the blade; then, based on the final geometric shape of the blade, the static loading design of the scheme is carried out; finally, the method was applied to the static testing of 100-meter-class blades, and compared and analyzed with the calculation results of ANSYS software and actual test results to verify the effectiveness of the method proposed in this paper. This method can quickly calculate blade deformation, iterate static loading schemes, and improve the design efficiency of static testing loading schemes.

Key words: wind turbine blades, static testing, finite difference method, composites, loading scheme

CLC Number:

TB332

FANG Siming, ZHUANG Lei, ZHOU Xiaoliang, KONG Kui, XU Liqiang, ZHANG Dinghao, LI Yalong. Application and research of finite difference method in static testing of large wind turbine blades[J]. COMPOSITES SCIENCE AND ENGINEERING, 2025, 0(9): 93-97.

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