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在A0羔羊波和高效的波形逆转算法的板块中通过厚度裂纹的现场稀疏阵列成像.

Shengyuan Zhang1, Jinglei Yang2, Wenjing Ye2

  • 1Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.

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概括

本研究介绍了一种有效的基于模型的裂成像方法,用于结构健康监测 (SHM). 该技术使用A0模式Lamb波来准确,低成本的在线裂检测和表征.

关键词:
裂的特征 裂的特征全波形逆转的全波形逆转.遗传算法 遗传算法 遗传算法根斯的原则 根斯原则羊羔的波浪在浪叫着.射线追踪 射线追踪 射线追踪结构性健康监测 结构性健康监测

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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:

  • 结构性故障通常是由于疲劳裂造成的,因此需要有效的在线裂检测和特征化,用于结构健康监测 (SHM).
  • 目前使用感知波信号进行裂纹特征的方法可能很复杂,需要广泛的传感器网络或详细的波包分析.
  • 基于模型的反转提供了一个有前途的替代方案,利用完整的波形数据进行更精简和准确的表征.

研究的目的:

  • 开发一种高效的,基于模型的裂成像方法,用于在线结构健康监测.
  • 解决现有方法的局限性,这些方法需要繁重的步骤或众多的传感器.
  • 以更少的传感器和更简单的实施来实现准确的裂特征.

主要方法:

  • 提出了一个利用惠根斯原理和A0模式Lamb波的无模式转换属性的高效模型.
  • 通过数值模拟和实验测试验证了基于模型的裂纹成像方法.
  • 应用该方法来分析光滑和粗的裂类型.

主要成果:

  • 提出的基于模型的反转方法有效地检测和描述裂.
  • 与传统方法相比,该方法在使用较少的传感器和更简单的实现方面证明了准确性.
  • 在模拟和实验生成的光滑和粗裂上取得了成功的验证.

结论:

  • 开发的基于模型的裂纹成像方法对SHM来说是高效的,易于实施的,并且具有成本效益.
  • 这种技术为在线监测结构完整性提供了理想的解决方案.
  • 该方法依赖于完整的波形分析和特定的Lamb波形特性,提高了其适用性.