复合结构定位的新响应表面技术,使用可变声波发射速度.
Binayak Bhandari1, Phyo Thu Maung1, Gangadhara B Prusty1,2
1School of Mechanical and Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, Australia.
Sensors (Basel, Switzerland)
|June 19, 2024
概括
一个名为COLORS的新算法精确地定位了复合材料中的声辐射 (AE) 源. 这种方法通过考虑AE信号减弱来改善损坏检测,优于传统的TDOA技术.
科学领域:
- 材料科学 材料科学 材料科学
- 结构健康监测 结构健康监测
- 非破坏性测试 不破坏性测试
背景情况:
- 传统的到达时差 (TDOA) 方法难以在异型复合材料中定位声辐射 (AE) 源.
- 精确的AE源定位对于检测纤维增强复合材料的结构缺陷至关重要.
研究的目的:
- 介绍一种新的算法,即使用响应表面 (COLORS) 的复合物定位,用于在层状复合材料中精确地定位AE源.
- 通过结合特定材料的参数来提高AE源预测的准确性.
主要方法:
- 开发了一种两步COLORS算法,利用基于AE速度配置,衰减率,距离和方向的响应表面.
- 通过使用实验数据,比较 COLORS 算法与传统 TDOA 方法的性能.
主要成果:
- 与TDOA的8.69毫米相比,COLORS算法实现了较低的平均绝对误差 (MAE) 6.97毫米.
- COLORS算法显示了9.24毫米的下根平均平方误差 (RMSE),而TDOA的12.06毫米.
- 确定AE信号衰减是提高AE定位精度的关键因素.
结论:
- 与TDOA相比,COLORS算法在复合结构中提供了优越的AE源定位精度.
- 这一进步对改善复合材料损坏检测和结构健康监测具有重大意义.
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