Experimental validation of ultrasonic guided modes in electrical cables by optical interferometry

Area of Science:

• Physics
• Materials Science
• Electrical Engineering

Background:

• Understanding elastic wave propagation is crucial for analyzing material behavior and signal integrity.
• Electrical cables and bare wires exhibit unique properties influencing wave dynamics.

Purpose of the Study:

• To theoretically derive and experimentally validate dispersion curves for elastic waves in electrical cables and bare copper wires.
• To investigate the influence of viscoelasticity and attenuation on wave propagation.

Main Methods:

• Theoretical modeling using Gazis equations and the global matrix methodology.
• Numerical resolution of the theoretical model.
• Incorporation of viscoelasticity and attenuation via the Kelvin-Voigt model.
• Experimental validation using interferometry techniques.

Main Results:

• Obtained theoretical dispersion curves for elastic waves in electrical cables and bare copper wires.
• Experimental results demonstrated good agreement with the theoretical simulations.
• The study successfully accounted for material peculiarities in electrical cables.

Conclusions:

• The theoretical model accurately predicts elastic wave dispersion in electrical cables and bare copper wires.
• The Kelvin-Voigt model effectively captures viscoelasticity and attenuation effects.
• The findings validate the global matrix methodology for analyzing wave propagation in complex structures.