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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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在板状结构中使用侧带峰值计数 (SPC) 技术检测和定位损伤.

Bo Hu1, Tribikram Kundu2

  • 1Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721, USA; Department of Civil and Architectural Engineering and Mechanics, University of Arizona, Tucson, AZ 85721, USA.

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本研究介绍了侧带峰值计数 (SPC) 技术,用于高效地检测板结构中的损伤. 该方法可以准确地识别损伤位置,而不需要基线,改善结构健康监测.

关键词:
检测和定位损坏的位置.弹性波浪传播弹性波浪传播有限元素建模的模型.侧带峰值计数指数 (SPC-I) 是一个指数.结构性健康监测 结构性健康监测

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科学领域:

  • 工程 工程师 工程师 工程师
  • 材料科学 材料科学 材料科学
  • 结构健康监测 结构健康监测

背景情况:

  • 板状结构在航空航天和海洋工程中至关重要.
  • 在这些结构中检测和定位损坏对于安全和性能至关重要.
  • 现有的方法通常需要广泛的传感器数据或基线参考.

研究的目的:

  • 为板结构引入一种新的损坏检测算法.
  • 开发一种技术,需要最小的传感器数据和没有基线参考.
  • 为了快速准确地定位损坏.

主要方法:

  • 该研究提出了侧带峰值计数 (SPC) 技术.
  • 该算法利用了有限数量的传感器响应.
  • 有限元模拟用于验证.

主要成果:

  • 该SPC技术展示了准确的损坏检测和定位能力.
  • 通过消除对参考基线的需求,提高了该方法的效率.
  • 模拟证实了算法在识别损坏位置方面的有效性.

结论:

  • 侧带峰值计数 (SPC) 技术为结构健康监测提供了一个有希望的解决方案.
  • 这种方法提高了板结构损害评估的可靠性和效率.
  • 该方法在航空航天,海洋和其他工程领域具有广泛的适用性.