在二维波导模型中对缺陷重建的反向方法的实验验证
J Bulling1, B Jurgelucks2, J Prager1
1Bundesanstalt für Materialforschung und -pruefung, Unter den Eichen 87, 12205 Berlin, Germany.
The Journal of the Acoustical Society of America
|June 12, 2024
概括
本研究介绍了一种基于梯度的算法,用于使用引导式超声波重建钢板中隙缺陷. 该方法准确地确定了隙几何形状,这对于非破坏性测试和结构健康监测至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试是指非破坏性测试.
背景情况:
- 缺陷重建对于结构健康监测 (SHM) 和非破坏性测试 (NDT) 至关重要.
- 引导式超声波为检查大型结构提供了一个有前途的技术.
- 准确地描述缺陷,如口,对于评估结构完整性至关重要.
研究的目的:
- 开发和验证一个算法,用于重建钢板中口的几何形状.
- 为了将实验测量与仿真数据进行比较,以进行缺陷表征.
- 推进NDT技术,以改善结构健康监测.
主要方法:
- 一个基于梯度的重建算法,利用算法差异化进行梯度计算.
- 一个模拟模型使用半分析缩放边界有限元素方法 (SBFEM) 进行板块截面分析.
- 使用扫描激光多普勒振动仪进行实验验证,以记录表面速度场.
主要成果:
- 该算法成功地重建了参数化的的几何参数.
- 准确的缺陷几何重建被证明使用两个钢板有不同深度的口.
- 该研究证实了将SBFEM模拟与缺陷分析实验数据相结合的有效性.
结论:
- 呈现的算法能够准确地对钢板上的隙进行几何重建.
- 这种技术对非破坏性测试和结构健康监测的进步做出了重大贡献.
- 这些发现支持使用引导式超声波来精确描述关键结构中的缺陷.
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