盲区缺陷成像使用多路径边缘反射的Lamb波
Nan Zhang1, Caibin Xu1, Liang Zeng2
1College of Aerospace Engineering, Chongqing University, Chongqing 400044, China.
Ultrasonics
|September 24, 2024
概括
这项研究引入了一种新的Lamb波成像技术,使用多路径边缘反射来检测以前看不见的盲区中的裂纹状缺陷. 该方法准确地通过厚度裂成像,克服了传统算法的局限性.
科学领域:
- 结构健康监测 结构健康监测
- 非破坏性测试是指非破坏性测试.
- 超声波波传播的超声波传播
背景情况:
- 传统的延迟和总和算法很难在盲区中检测缺陷.
- 羔羊波提供了检测结构损坏的潜力.
- 边缘反射通常被忽视或难以用传统方法解释.
研究的目的:
- 开发一种先进的基于Lamb波的缺陷成像方法.
- 为了在盲区中检测类似裂的缺陷.
- 提高非破坏性测试的准确性和可靠性.
主要方法:
- 使用Lamb波的多路径边缘反射.
- 通过镜像点引入虚拟发射器和接收器.
- 建立基于追踪波包路径的损害指数.
- 采用乘法策略来融合多顺序波束图像并减少文物.
主要成果:
- 在盲区中成功检测到通过厚度的裂.
- 通过数值和实验验证的有效性和可行性.
- 在裂定位中达到1.12%的最小相对误差.
结论:
- 拟议的Lamb波成像方法有效地检测盲区中的缺陷.
- 多路径边缘反射显著提高了缺陷检测能力.
- 该技术为结构健康监测提供了有前途的进步.
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