Multiphysics Modelling of the Coupled Behaviour of Precision-guided Projectiles Subjected to Intense Shock Loads
Bibliographic record
Abstract
Precision-guided projectiles (PGPs) are subjected to severe shock loads, often leading to the failure of the highly sophisticated embedded electronic systems (EES) responsible for guidance. It is the objective of this work to conduct a comprehensive explicit axisymmetric Lagrangian-Eulerian multiphysics finite element analysis of the entire launch process of PGPs accounting for coupling and interaction effects between the different media. The influence of these interaction and coupling effects on the local and global accelerations and pressures are studied. An extensive examination of the severity and frequency of the reflected waves and the effect of PGPs springback is conducted. The results reveal that the pressure drop at muzzle exit is the contributing factor determining the severity of exit accelerations. Moreover, the formation and interaction of shock waves has little effect on the projectile response. Finally, the interaction with barrel has a significant influence on projectile response, especially after muzzle exit.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| 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 source (direct Gemma or distilled Codex), 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".