More or less researched types of multi-hull ships and their specificities: the general view. The main conformity of the ship types and theirs technical and exploitation characteristics. Twin-hulls as most wide- spread types of multi-hulls, especially as high-speed passenger ones. Ship performance as the most important characteristic of fast enough ships. The main dimensions and general characteristics of 25 built twin-hull ships with small water-plane area and 15 built high-speed catamarans. (It is not so big volume for statistics, but even it allows showing of some useful characteristics of these ships.) Some important characteristics of these ships were examined: so named “admiral coefficient; relative speed (Froude number by a hull length); relative length of a hull; relative draft”. Calculated relative characteristics show, firstly, evident growth of admiral coefficient of SWATHs with Froude number increasing. Surprisingly, the examined high-speed catamarans have slightly lower admiral coefficient at corresponded Froude numbers, most possible because of smaller immersion of the main volume of hulls and smaller draft, which defines smaller diameter of propulsors. Relative length and relative draft of SWATHs show moderate growth for bigger Froude numbers, but the dispersions are big enough and the usable numbers of these characteristics are not defined more or less exactly. But the better (from propulsion point of view) shown ships can be applied for approximate estimation of the same characteristic of newly designed ships.
| Published in | Engineering Science (Volume 4, Issue 4) |
| DOI | 10.11648/j.es.20190404.11 |
| Page(s) | 54-58 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2019. Published by Science Publishing Group |
Multi-hulls, Admiral Coefficient, SWATH, Catamaran, Statistics, Relative Dimensions, Relative Draft, Relative Length
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APA Style
Victor Dubrovsky. (2019). Some Notes on Statistics of SWATHs and Catamarans. Engineering Science, 4(4), 54-58. https://doi.org/10.11648/j.es.20190404.11
ACS Style
Victor Dubrovsky. Some Notes on Statistics of SWATHs and Catamarans. Eng. Sci. 2019, 4(4), 54-58. doi: 10.11648/j.es.20190404.11
AMA Style
Victor Dubrovsky. Some Notes on Statistics of SWATHs and Catamarans. Eng Sci. 2019;4(4):54-58. doi: 10.11648/j.es.20190404.11
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Download@article{10.11648/j.es.20190404.11,
author = {Victor Dubrovsky},
title = {Some Notes on Statistics of SWATHs and Catamarans},
journal = {Engineering Science},
volume = {4},
number = {4},
pages = {54-58},
doi = {10.11648/j.es.20190404.11},
url = {https://doi.org/10.11648/j.es.20190404.11},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.es.20190404.11},
abstract = {More or less researched types of multi-hull ships and their specificities: the general view. The main conformity of the ship types and theirs technical and exploitation characteristics. Twin-hulls as most wide- spread types of multi-hulls, especially as high-speed passenger ones. Ship performance as the most important characteristic of fast enough ships. The main dimensions and general characteristics of 25 built twin-hull ships with small water-plane area and 15 built high-speed catamarans. (It is not so big volume for statistics, but even it allows showing of some useful characteristics of these ships.) Some important characteristics of these ships were examined: so named “admiral coefficient; relative speed (Froude number by a hull length); relative length of a hull; relative draft”. Calculated relative characteristics show, firstly, evident growth of admiral coefficient of SWATHs with Froude number increasing. Surprisingly, the examined high-speed catamarans have slightly lower admiral coefficient at corresponded Froude numbers, most possible because of smaller immersion of the main volume of hulls and smaller draft, which defines smaller diameter of propulsors. Relative length and relative draft of SWATHs show moderate growth for bigger Froude numbers, but the dispersions are big enough and the usable numbers of these characteristics are not defined more or less exactly. But the better (from propulsion point of view) shown ships can be applied for approximate estimation of the same characteristic of newly designed ships.},
year = {2019}
}
TY - JOUR T1 - Some Notes on Statistics of SWATHs and Catamarans AU - Victor Dubrovsky Y1 - 2019/12/18 PY - 2019 N1 - https://doi.org/10.11648/j.es.20190404.11 DO - 10.11648/j.es.20190404.11 T2 - Engineering Science JF - Engineering Science JO - Engineering Science SP - 54 EP - 58 PB - Science Publishing Group SN - 2578-9279 UR - https://doi.org/10.11648/j.es.20190404.11 AB - More or less researched types of multi-hull ships and their specificities: the general view. The main conformity of the ship types and theirs technical and exploitation characteristics. Twin-hulls as most wide- spread types of multi-hulls, especially as high-speed passenger ones. Ship performance as the most important characteristic of fast enough ships. The main dimensions and general characteristics of 25 built twin-hull ships with small water-plane area and 15 built high-speed catamarans. (It is not so big volume for statistics, but even it allows showing of some useful characteristics of these ships.) Some important characteristics of these ships were examined: so named “admiral coefficient; relative speed (Froude number by a hull length); relative length of a hull; relative draft”. Calculated relative characteristics show, firstly, evident growth of admiral coefficient of SWATHs with Froude number increasing. Surprisingly, the examined high-speed catamarans have slightly lower admiral coefficient at corresponded Froude numbers, most possible because of smaller immersion of the main volume of hulls and smaller draft, which defines smaller diameter of propulsors. Relative length and relative draft of SWATHs show moderate growth for bigger Froude numbers, but the dispersions are big enough and the usable numbers of these characteristics are not defined more or less exactly. But the better (from propulsion point of view) shown ships can be applied for approximate estimation of the same characteristic of newly designed ships. VL - 4 IS - 4 ER -
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