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Introducing Obliquely Perforated Phononic Plates for Enhanced Bandgap Efficiency
Saeid Hedayatrasa1, Mathias Kersemans2, Kazem Abhary3
1Department of Materials, Textiles and Chemical Engineering, Ghent University, Technologiepark-Zwijnaarde 903, 9052 Zwijnaarde, Belgium. saeid.hedayatrasa@ugent.be.
Novel oblique perforation in porous phononic crystal plates (PhPs) enhances bandgap properties. This design innovation improves the efficiency of filtering, resonating, and steering guided wave modes.
Area of Science:
- Acoustics and Materials Science
- Wave phenomena in engineered structures
Background:
- Porous phononic crystal plates (PhPs) with perpendicular perforations are known for manipulating guided waves.
- Non-uniform cross-sections in phononic structures can significantly alter wave interactions.
Purpose of the Study:
- To introduce and investigate novel porous phononic crystal plates (OPhPs) with oblique perforation angles.
- To explore the impact of oblique perforation on phononic bandgap properties and wave manipulation.
Main Methods:
- Modal band analysis at the unit-cell scale.
- Investigating phononic bandgap variations with respect to perforation angle.
- Analyzing unit-cells with arbitrary and optimized topologies.
Main Results:
- Oblique perforation introduces non-uniformity, affecting wave mode interactions and phononic properties.
- Bandgap characteristics are significantly influenced by the perforation angle.
- Optimized topologies and perforation angles enhance unidirectional and/or omnidirectional bandgap efficiency.
Conclusions:
- Obliquely perforated phononic crystal plates (OPhPs) offer enhanced control over guided wave propagation.
- The design flexibility of OPhPs allows for tailored phononic properties and improved bandgap performance.
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