CRACK INDIRECT IDENTIFICATION METHOD FOR DYNAMIC VIBRATION FREQUENCY OF WIND BLADES

WU QiQiang; GUO ShuaiPing; WANG Gang; LI XueJun

doi:10.16579/j.issn.1001.9669.2019.05.006

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CRACK INDIRECT IDENTIFICATION METHOD FOR DYNAMIC VIBRATION FREQUENCY OF WIND BLADES

更新时间：2022-09-22

- CRACK INDIRECT IDENTIFICATION METHOD FOR DYNAMIC VIBRATION FREQUENCY OF WIND BLADES
- Journal of Mechanical Strength Vol. 41, Issue 5, Pages: 1048-1053(2019)
- 作者机构：
  
  1. 湖南科技大学机械设备健康维护湖南省重点实验室
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.05.006
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WU QiQiang, GUO ShuaiPing, WANG Gang, et al. CRACK INDIRECT IDENTIFICATION METHOD FOR DYNAMIC VIBRATION FREQUENCY OF WIND BLADES. [J]. 41(5):1048-1053(2019)
DOI：

WU QiQiang, GUO ShuaiPing, WANG Gang, et al. CRACK INDIRECT IDENTIFICATION METHOD FOR DYNAMIC VIBRATION FREQUENCY OF WIND BLADES. [J]. 41(5):1048-1053(2019) DOI： 10.16579/j.issn.1001.9669.2019.05.006.

摘要

针对风力机叶片裂纹定位问题,基于裂纹叶片固有频率差值比参数只与损伤位置相关的关系,提出了固有频率差值比的裂纹位置参数,通过数值仿真计算,建立裂纹位置参数数据库,提出裂纹定位参数及裂纹定位准则,实现了叶片裂纹所属区间定位;同时,研究叶片裂纹定位参数在裂纹区间内的变化规律,建立了裂纹定位参数与区间相对位置间的映射关系,实现了叶片裂纹区间内的精确定位。通过数值仿真分析验证了该方法的有效性,且定位精度较高,为实际的应用提供有力的依据。

Abstract

In view of the problem of crack location in wind turbine blade, based on the relation between the difference ratio parameter of natural frequency of cracked blade and damage location, the crack location parameter of natural frequency difference ratio was put forward.The database of crack location parameters was established by numerical simulation calculation, the crack location parameters and crack location criteria were put forward to realize the crack location in the blade. Meanwhile, the variation law of crack location parameters in the crack zone was studied. The mapping relationship between the crack location parameters and the relative position of the crack region was established, and the accurate location of the blade crack interval was realized. The effectiveness of the method is verified by numerical simulation, and the positioning accuracy is high, which provides a powerful basis for practical application.

关键词

风力机叶片裂纹定位固有频率数值仿真计算

Keywords

Wind turbine bladeCrack locationNatural frequencyNumerical simulation calculation

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