Optimization of Band Gap Area in the Low-Frequency In-Plane Elastic/Acoustic Passive Adaptive Metamaterial
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Bibliographic record
Abstract
View Video Presentation: https://doi.org/10.2514/6.2023-2123.vid The present research aims to enhance and control bandgaps in a periodic metamaterial of square shape by adding a cylindrical core to the center of the conventional geometry and changing its arm angles. The base unit cell was unable to exhibit bandgaps mainly due to uniform mass distribution in the unit cell. The introduced modified unit cell incorporating a cylindrical core at the center with isosceles trapezoid arms permitted the generation of new bandgap areas capable of attenuation of propagating waves in desirable frequency ranges. Bloch's theorem and finite element method with periodic boundary conditions are employed to analyze the band structure and also to investigate the effect of unit cell geometrical parameters on the low-frequency band gap area. The present research outcomes may provide an essential guide to designing architected periodic filters with the ability to attenuate low-frequency elastic/acoustic vibrations.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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