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Published on: May 15, 2017
A perturbation method for modeling the thermal sensitivity of surface transverse waves
E Gavignet1, S Ballandras, E Bigler
1Lab. de Phys. et Metrologie des Oscillateurs, Univ. de Franche-Comte, Besancon.
Summary
This study introduces a perturbation approach to predict how surface transverse waves (STW) are affected by temperature changes. The method combines wave characteristics with substrate properties, offering insights for sensor development.
Area of Science:
- Physics
- Materials Science
- Acoustics
Background:
- Surface transverse waves (STW) are sensitive to environmental changes, making them useful for sensors.
- Understanding temperature effects on STW is crucial for reliable device performance.
- Thermoelastic properties significantly influence wave propagation in materials.
Purpose of the Study:
- To develop a perturbation approach for predicting STW sensitivity to quasi-static temperature effects.
- To analyze STW propagation under shallow groove and thin metal strip gratings.
- To provide analytical expressions for temperature coefficients.
Main Methods:
- Utilizing a perturbation approach combining unperturbed STW characteristics and substrate thermoelastic properties.
- Calculating unperturbed STW parameters with consideration for piezoelectricity.
- Deriving analytical expressions for the first-order temperature coefficient for groove gratings.
- Proposing a simplified calculation for thin metal strip grating devices.
Main Results:
- An analytical expression for the first-order temperature coefficient was derived for groove gratings.
- A simplified calculation method was proposed for thin metal strip grating devices.
- The model's predictions were compared with existing experimental data, showing good agreement.
Conclusions:
- The developed perturbation approach effectively predicts STW sensitivity to temperature.
- The findings are applicable to the design and optimization of temperature-sensitive acoustic devices.
- Further model improvements could enhance prediction accuracy for various grating configurations.
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