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在Lamb波检测可变横截面结构中的传感器阵列的新优化方法.

Ziwei Fang1, Chenjun Gao2, Xuefei Guan3

  • 1School of Reliability and Systems Engineering, Beihang University, Beijing 100191, China; Advanced Manufacturing Center, Ningbo Institute of Technology, Beihang University, Ningbo 315800, China.

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概括
此摘要是机器生成的。

这项研究介绍了一种优化复杂航空航天结构中Lamb波传感器放置的高效方法. 该方法通过提高波能聚焦和检测性能来增强结构健康监测 (SHM).

关键词:
阵列优化 阵列优化动态模拟的动态模拟羊羔的波浪 羊羔的波浪时刻二次法方法 时刻二次法方法可变横截面波导的波导.

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科学领域:

  • 航空航天工程 航空航天工程
  • 材料科学 材料科学 材料科学
  • 机械工程 机械工程

背景情况:

  • 复杂的横截面结构在航空航天领域至关重要,需要有效的结构健康监测 (SHM).
  • 基于Lamb波的SHM面临着挑战,因为影响分散和传感器排列的几何复杂性.
  • 现有的方法,如分相阵列,对于现场监测可能是复杂和昂贵的.

研究的目的:

  • 为灵活的Lamb波传感器阵列放置开发一种高效的优化方法.
  • 为了应对分散计算和精力集中在复杂几何形状中的SHM的挑战.
  • 为了在真正的合金发动机风扇叶片上验证拟议的方法.

主要方法:

  • 使用矩阵方程方法来生成代表性的稀疏样本.
  • 采用改进的半分析有限元 (SAFE) 方法,用于分散分析的连续截面映射.
  • 进行动态模拟以研究波动,并优化波焦的参数.
  • 开发聚焦能量的多项式模型,以获得优化的传感器安排.

主要成果:

  • 拟议的方法可以在没有广泛的随机抽样的情况下有效地检测Lamb波.
  • 确定了优化的传感器安排,以改善波能聚焦.
  • 该方法通过模拟和在发动机风扇叶片上的实验测试得到了验证.

结论:

  • 开发的优化方法有效地解决了Lamb波SHM对复杂结构的挑战.
  • 灵活的传感器阵列放置可以有效地优化,以增强波聚焦和检测.
  • 该方法为改善航空航天应用中的SHM提供了实际解决方案.