Parabolization and structural integrity of side bulb applied platform supply vessel hull form
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
The parabolization work is a hull-optimization method for minimizing total resistance of ship by using numerical and experimental methods. Ship total hydrodynamic resistance is a sum of frictional resistance, form resistance and wave resistance. The form resistance is a fraction of frictional resistance while the wave resistance dominates as speed increases. It becomes clear to turn toward minimizing wave resistance for hull-form optimization studies regarding increased speeds. In 2002, Calisal et al. reported a 10% decrease in effective horse power at Fn = 0.275 for a coaster tanker. The objective was to attain a beneficial wave-resistance reduction over a moderate to relatively high operating speed range. The parabolization work was done by a computer software that expends the form at waterline and replaces the conventional parallel middle-body section with parabolic side bulbs. This study was made for a oil platform supply vessel (PSV)and studies an improved , new hull form. The form is a new “retrofit” , for the present parent hull form, increasing the vessel’s beam up to 5% and its displacement accordingly. In this thesis new scantling was calculated for the parabolized hull. The structural analysis and design for the parent and “retrofit” hull forms were done, using the rules and guidelines of the American Bureau of Shipping (ABS). The final part of the thesis provides a cost payback analysis of the parabolized PSV. A fuel savings of 280,000 liters/year provides $235,000.00 per year saving based on a 5.88% drop in resistance . The investment for the construction of an amidships bulb is estimated at $161,000. The payback period for the construction of an amidships bulb is estimated to be nine to seventeen months, with different ship type factors. In addition resistance reduction saves 753,900 kg of CO2 and 134,100 kg of NOx . The parabolization cost analysis is seen in three parts. First, the investment cost of the side bulb. Second, the savings in fuel cost representing the savings in the running cost and the change in the investment cost of propulsion machinery of the vessel and thirdly, the environmental savings by low CO2 and NOx emission.
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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