使用多个Lamb波模式的组合信息检测和定位腐蚀
Liping Huang1, Zhi Luo2, Liang Zeng3
1School of Mechanical Engineering, Xi'an University of Science and Technology, Xi'an, Shaanxi Province 710054, China.
Ultrasonics
|February 3, 2024
概括
本研究引入了一种新的无基线方法,用于使用多个Lamb波模式检测和定位腐蚀. 通过分析具有相反灵敏度趋势的模式的飞行时间比率,可以显著提高腐蚀检测的准确性.
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
- 非破坏性测试是指非破坏性测试.
背景情况:
- 羔羊波表现出多模式和分散特征,导致复杂的传播行为.
- 腐蚀导致厚度减小,影响频率-厚度乘积和Lamb波相互作用.
- 由于分散的多样性,个别的Lamb模式与腐蚀的相互作用不同.
研究的目的:
- 开发一种新的,没有基线的方法,用于增强腐蚀检测和定位.
- 为了利用多个Lamb波模式的独特分散行为来提高灵敏度.
- 为了消除传感器网络中路径长度差异的影响.
主要方法:
- 利用两种对腐蚀敏感但具有相反的变化趋势的Lamb波模式.
- 根据它们的飞行时间的比率来定义腐蚀指数.
- 实现一个概率重建算法用于缺陷检测和定位.
- 分析模式转换对方法有效性的影响.
主要成果:
- 拟议的方法成功地识别并准确地定位腐蚀缺陷.
- 与单模式方法相比,结合多种模式可以提高对腐蚀的敏感性.
- 没有基线的性质简化了诊断过程.
结论:
- 开发的方法为结构性腐蚀监测提供了一种强大而敏感的方法.
- 使用具有相反灵敏度趋势的多个Lamb波模式对损害评估是有效的.
- 概率重建算法提供了准确的缺陷定位.
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