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Chladni Figures in Modal Analysis of a Double-Panel Structure.

Jaroslaw Rzepecki1, Anna Chraponska1, Sebastian Budzan1

  • 1Department of Measurements and Control Systems, Silesian University of Technology, Akademicka 16, 44-100 Gliwice, Poland.

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Chladni figures offer a faster alternative to Laser Doppler Vibrometry for analyzing structural vibration in double-panel structures, especially when temperature changes affect resonance frequencies.

Keywords:
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Area of Science:

  • Mechanical Engineering
  • Acoustics
  • Materials Science

Background:

  • Structural vibration analysis is crucial for device quality assurance.
  • Laser Doppler Vibrometry (LDV) is a common but time-consuming method for vibration analysis.
  • Temperature fluctuations can shift structural resonances, complicating LDV measurements.

Purpose of the Study:

  • To propose Chladni figures as an efficient method for modal analysis of double-panel structures.
  • To compare Chladni figure analysis with traditional LDV under varying thermal conditions.
  • To validate experimental Chladni figure results with simulation data.

Main Methods:

  • Modal analysis of a double-panel structure excited by an internal loudspeaker.
  • Generation of Chladni figures using vision images.
  • Image processing using the GLCM matrix to create binary patterns.
  • Finite element analysis using ANSYS for simulation and comparison.

Main Results:

  • Chladni figures provide a viable alternative for modal analysis, particularly when rapid temperature changes occur.
  • The proposed method offers a reduced analysis time compared to LDV.
  • Experimental Chladni figure patterns correlate well with ANSYS simulations.

Conclusions:

  • Chladni figures are an effective and efficient technique for modal analysis of double-panel structures.
  • This method is advantageous in scenarios with dynamic environmental conditions like temperature fluctuations.
  • The study validates the use of Chladni figures for quality assurance in device design.