Model testing of dynamic response of loess to impact load from helicopter landing
Why this work is in the frame
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Bibliographic record
Abstract
To investigate the dynamic behaviour of loess under the impact loads of two tyres attached to a helicopter’s landing gear, a loading device capable of simultaneously applying dual impact loads was designed. A series of physical model tests, varying in impact energy and water content of the loess samples, were conducted. The study explored the settlement pattern, vertical dynamic stress distribution, and the effects of impact energy and water content. Results revealed that settlement in the shallow layer exhibits a characteristic W-shape, while the vertical dynamic stress time curve displays a single peak pulse. Settlement and vertical dynamic stress increase with higher impact energy. Increasing the water content of the loess sample results in greater settlement but lower vertical dynamic stress. For the simulated helicopter, when the tyre impact energy increases from 23.8 to 60.8 kJ, the resultant crater depth in loess with a moisture content of 16% increases from 7.6 to 18.1 cm, an increase of 11.5 cm. The peak vertical dynamic stress at a depth of 10 cm along the centerline of the tamper increases from 590.98 to 1449.4 kPa, more than doubling. These findings are valuable for the design of landing sites and landing gear systems.
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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 | 0.000 | 0.000 |
| 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)
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 it