Crack detection technique for operating wind turbine blades using Vibro-Acoustic Modulation

被引：37

作者：

Kim, Sungmin ^{[1
]}

Adams, Douglas E. ^{[2
]}

Sohn, Hoon ^{[3
]}

Rodriguez-Rivera, Gustavo ^{[1
]}

Myrent, Noah ^{[2
]}

Bond, Ray ^{[1
]}

Vitek, Jan ^{[1
]}

Carr, Scott ^{[1
]}

Grama, Ananth ^{[1
]}

Meyer, Janette Jaques ^{[2
]}

机构：

[1] Purdue Univ, W Lafayette, IN 47907 USA

[2] Vanderbilt Univ, Nashville, TN 37240 USA

[3] Korea Adv Inst Sci & Technol, Taejon 305701, South Korea

来源：

STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL | 2014年 / 13卷 / 06期

基金：

美国国家科学基金会;

关键词：

Vibro-Acoustic Modulation; crack detection; micro fiber composite; nonlinear method; frequency response function; wind turbine blades;

D O I：

10.1177/1475921714553732

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article presents a new technique for identifying cracks in wind turbine blades undergoing operational loads using the Vibro-Acoustic Modulation technique. Vibro-Acoustic Modulation utilizes a low-frequency pumping excitation signal in conjunction with a high-frequency probing excitation signal to create the modulation that is used to identify cracks. Wind turbines provide the ideal conditions in which Vibro-Acoustic Modulation can be utilized because wind turbines experience large low-frequency structural vibrations during operation which can serve as the low-frequency pumping excitation signal. In this article, the theory for the vibro-acoustic technique is described, and the proposed crack detection technique is demonstrated with Vibro-Acoustic Modulation experiments performed on a small Whisper 100 wind turbine in operation. The experimental results are also compared with two other conventional vibro-acoustic techniques in order to validate the new technique. Finally, a computational study is demonstrated for choosing a proper probing signal with a finite element model of the cracked blade to maximize the sensitivity of the technique for detecting cracks.

引用

页码：660 / 670

页数：11

共 16 条

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