Modelling out-of-plane hydrodynamic hysteresis in horizontal submarine maneuvers with indicial responses
Bibliographic record
Abstract
Predicting the transient hydrodynamic loads in submarine maneuvering simulations has traditionally been limited to quasi-steady modelling assumptions which are not well-founded in extreme maneuvering scenarios. Recent studies have shown that the time-history of the wake is significant for the out-of-plane hydrodynamics of a submarine in horizontal maneuvers. Despite efforts of modelling these effects with integral-type impulse response methods, known within the vehicle dynamics community as indicial theory, the complex separation and development of the wake surrounding the hull causes significant modelling errors in high frequency oscillation maneuvers. This study investigates characteristics of the time-domain hydrodynamic response of an SSK-class submarine, and a corresponding reduced-order model implementation. Model predictions for a set of small and large amplitude drift oscillation maneuvers are used to demonstrate the shortcomings of the current model formulation. A revised model designed to modify the high-frequency response of the vehicle is shown to significantly improve the qualitative and quantitative performances of the model in large amplitude oscillations.
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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 | 0.000 | 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 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".