使用侧带峰数指数和拓声学传感技术监测板块结构的损伤增长和地形变化
Guangdong Zhang1, Pierre A Deymier2, Keith Runge2
1New Frontiers of Sound Science and Technology Center, University of Arizona, Tucson, AZ 85721, USA; Department of Civil and Architectural Engineering and Mechanics, University of Arizona, Tucson, AZ 85721, USA.
Ultrasonics
|May 25, 2024
概括
板结构中的地形特征可以隐藏裂,使声学监测复杂化. 一种新的拓声学传感方法可以有效地检测损伤增长,即使隐藏在非线性超声波技术之外.
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 不破坏性测试
背景情况:
- 板结构中的地形特征通过改变波传播来复杂化基于声学的结构健康监测 (SHM).
- 损害的增长可以被破坏性干扰掩盖,使某些区域对监控不敏感.
研究的目的:
- 研究非线性超声波 (NLU) 技术,特别是侧带峰数指数 (SPC-I) 的有效性,用于监测具有地形特征的板结构中的裂纹生长.
- 评估一种新兴的拓声学传感技术,用于在复杂的地形存在时检测损坏.
主要方法:
- 基于非局部周边动力学的周边超声波建模用于模拟异质标本中的波传播.
- 分析了三个不同的地形 ("X"",Y"",XY") 以评估它们对裂检测能力的影响.
- 对不同地形条件进行了SPC-I技术和拓声学传感的性能比较.
主要成果:
- 发现"X"和"XY"的地形有效地隐藏了裂的生长,使它们无法通过SPC-I技术检测到.
- 通过监测几何相变化的拓声学传感,在所有研究的地形上成功检测到损坏的增长.
- 几何相的显著变化与裂的生长相关,即使对于从SPC-I单点检查中隐藏的裂.
结论:
- 拓声学传感为复杂地形板结构中的损伤监测提供了强大的解决方案,克服了传统NLU方法的局限性.
- 该研究强调了几何相位分析在SHM应用中的潜力,因为传统技术可能会因为结构异质而失败.
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