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Research on Piezoelectric Guided Wave Frequency Diverse Array-Based Damage Location Method for Thin-Walled

Changlin Wang1, Quanyao Hu2, Yongteng Zhong2

  • 1School of Information Technology, Jiangsu Open University, Nanjing 210036, China.

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|October 29, 2025
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Summary
This summary is machine-generated.

This study introduces a novel guided wave frequency diverse array (FWDA) method for precise damage location in thin-walled structures. The technique achieves two-dimensional focusing for effective interference suppression and accurate damage imaging.

Keywords:
MUSICdamage locationfrequency diverse arrayguided waves

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Area of Science:

  • Structural Health Monitoring
  • Ultrasonic Guided Waves
  • Array Signal Processing

Background:

  • Phased array technology offers beam steering but struggles with distance interference due to direction-dependent patterns.
  • Efficient damage detection in thin-walled structures requires advanced methods to overcome limitations of traditional techniques.

Purpose of the Study:

  • To develop and validate a guided wave frequency diverse array (FWDA) based method for accurate damage location in thin-walled structures.
  • To enhance damage detection by achieving two-dimensional focusing and maximizing damage-induced signal amplitude.

Main Methods:

  • A guided wave frequency diverse array signal model was derived, enabling distance-direction two-dimensional focusing with small frequency increments.
  • Three receiving array configurations (monostatic, following, symmetric) were designed to maximize the detection of damage-induced signals.
  • A two-dimensional Multiple Signal Classification (MUSIC) algorithm was employed for damage imaging and localization.

Main Results:

  • The proposed FWDA method successfully achieved two-dimensional focusing, improving the ability to pinpoint damage locations.
  • Simulations on an aluminum plate and experiments on an epoxy laminate plate confirmed the method's effectiveness.
  • The developed technique demonstrated superior performance in damage imaging within thin-walled structures.

Conclusions:

  • The guided wave frequency diverse array approach provides a robust and effective solution for damage location in thin-walled structures.
  • The method overcomes limitations of conventional phased arrays by enabling precise two-dimensional focusing and interference suppression.
  • This research contributes a valuable tool for structural health monitoring and integrity assessment of critical components.