Acoustic radiation due to the inelastic impact of a sphere on a rectangular plate
Bibliographic record
Abstract
Impact between two structures is an important source of noise in industry. However, it is not a well-known phenomenon from a theoretical point of view. The models available in the literature for impact noise often address only part of the phenomenon. In this paper, a more comprehensive model is developed. The acoustic radiation due to the inelastic impact of a sphere with a rectangular simply supported thin plate is formulated and validated experimentally. The impact force is calculated from Hertz's law, which has been extended to the case of plastic deformations, and the acoustic radiation in the time domain is obtained using Rayleigh's integral, the plate being discretized in rectangular elements. The model is used to show that the sound-radiation mechanism includes two separate sources: the initial deformation of the plate and the propagation of the bending waves. The model is also used to determine the contribution to impact noise of parameters that characterize the two impacting structures or the impact configuration such as plasticity, damping, materials, and impact velocity.
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How this classification was reachedexpand
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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".