RESEARCH ON DYNAMIC CHARACTERISTICS OF WIND POWER BLADES BASED ON PERTURBATION MODE ANALYSIS

被引：0

作者：

Yang J. ^{[1
]}

Wang W. ^{[1
]}

Dai J. ^{[2
]}

机构：

[1] Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiantan

[2] College of Mechanical and Electrical Engineering, Hunan University of Science and Technology, Xiantan

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 11期

关键词：

dynamic rigidity effect; finite element method; modal analysis; rotation softening effect; wind turbine blades;

D O I：

10.19912/j.0254-0096.tynxb.2022-1045

中图分类号：

学科分类号：

摘要：

In view of the phenomenon that the blade is coupled by rotating softening effect and dynamic stiffening effect，which leads to the change of its modal characteristics under the operating state of large-scale blade，a vibration analysis method of rotating blade based on perturbation modal analysis is proposed. In this paper，two blade models of 0.89 m and 61.5 m are established. Through numerical simulation，the influence of two effects on blade frequency at 0-50 r/min speed is analyzed. Based on the variation rule of calculated frequency difference Δf，the correlation between the three main modes of blade and the two effects is studied. Finally，in order to verify the accuracy of numerical simulation，experimental modal analysis and numerical simulation results are compared by hammering method. The experimental results show that the errors of first and second order mode frequencies are within 1%，and the calculation results in this paper are more accurate. © 2023 Science Press. All rights reserved.

引用

页码：231 / 238

页数：7