超声波扩散散体波被动阵列成像复杂结构中内部缺陷的复杂结构

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Zhengjun Wang¹, Fan Shi¹

¹Department of Mechanical and Aerospace Engineering, Hong Kong University of Science and Technology, Kowloon, Hong Kong Special Administrative Region, China.

|May 31, 2024

概括

这项研究引入了一种超声波被动阵列成像方法,用于检测轮机叶片等复杂元件的内部缺陷. 该技术使用扩散波和激光振动计进行现场检查,在传统探测器失败的情况下.

科学领域:

非破坏性测试是指非破坏性测试.
超声波传播的超声波传播.
材料科学是一种材料科学.

背景情况:

检查具有复杂几何形状的安全关键部件的缺陷,如轮机叶片,对于传统的超声波方法来说是具有挑战性的.
商业阶段阵列探测器与不规则的外部边界作斗争,限制了现场成像能力.
不规则的组件形状产生分散的弹性波场,可以用于成像.

研究的目的:

开发和评估超声波被动阵列成像方法,用于复杂几何体内的内部缺陷检测.
在不规则的表面上克服传统超声波探针的局限性.
为了利用分散的反响进行高分辨率的地下成像.

主要方法:

使用活性压电驱动器激发弹性扩散波.
扫描激光振动仪在多个点接收分散波.
通过完全聚焦方法被动全矩阵捕获 (FMC) 信号提取和缺陷成像.

主要成果:

成功实施了使用扩散反响的超声波被动阵列成像方法.
数字模拟表明了该方法在缺陷成像方面的潜力.
在轮机叶片状结构上的实验验证证证了成像能力.

结论:

建议的超声波被动阵列成像方法对于检查具有复杂外部几何形状的组件中缺陷是有效的.
扩散波场利用为现场检查的传统方法提供了可行的替代方案.
该技术在提高关键组件的安全性和可靠性方面表现有前途.

关键词:

射线成像阵列的成像复杂的结构结构复杂的结构.扩散场是一个扩散场.激光振动计的激光振动计非破坏性评价 - - 非破坏性评价超声波损伤检测超声波损伤检测

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