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<p>In the current energy landscape, there is a growing focus on the adoption of non-conventional energy sources. The global community has recognized the critical role these sources play in addressing energy needs sustainably. Modern wind turbine systems, for instance, can generate an average of 3&#xa0;MW of power, with turbines typically installed at a height of around 120&#xa0;m. Technological advancements have brought increased attention to the maintenance of these systems, particularly to their blades, which are crucial for power generation. In this regard, this study examines the impact of edgewise cracks on wind turbine blades by analyzing changes in their natural frequencies. Initially, the natural frequency of an un-cracked blade is measured. Subsequently, a longitudinal edgewise crack is introduced at two distinct positions on one of the blades, varying in length, and the natural frequencies are determined using an FFT analyzer. The findings indicate that the presence of a crack significantly reduces the blade’s stiffness, with the most substantial reduction occurring near the blade tip when the crack length is 60&#xa0;mm.</p>

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Experimental Investigation of Effect of Edgewise Crack on Wind Turbine Blade Using Vibration-Based Method

  • 期刊论文

  • 发表日期：

    2025年11月29日

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  • Sourabh S. Kulkarni,
  • Suresh A. Patil

摘要

In the current energy landscape, there is a growing focus on the adoption of non-conventional energy sources. The global community has recognized the critical role these sources play in addressing energy needs sustainably. Modern wind turbine systems, for instance, can generate an average of 3 MW of power, with turbines typically installed at a height of around 120 m. Technological advancements have brought increased attention to the maintenance of these systems, particularly to their blades, which are crucial for power generation. In this regard, this study examines the impact of edgewise cracks on wind turbine blades by analyzing changes in their natural frequencies. Initially, the natural frequency of an un-cracked blade is measured. Subsequently, a longitudinal edgewise crack is introduced at two distinct positions on one of the blades, varying in length, and the natural frequencies are determined using an FFT analyzer. The findings indicate that the presence of a crack significantly reduces the blade’s stiffness, with the most substantial reduction occurring near the blade tip when the crack length is 60 mm.