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Effect of Ship Size on the Hull Dimension Ratios of Purse Seiners
Efecto del tamaño de la embarcación sobre los coeficientes de dimensiones del casco de los barcos cerqueros
DOI:
https://doi.org/10.15446/ing.investig.116364Keywords:
hull dimension ratios, purse seiner, ship size, regression analysis, hull statistics (en)relaciones de dimensiones del casco, cerquero, tamaño del barco, análisis de regresión, estadísticas del casco (es)
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In the preliminary ship design stage, the first approximations of speed, stability, structure, weight, and cost, among others, are reached by selecting the appropriate hull dimension ratios. This research was motivated by the noticeable lack of systematic data on these ratios in the literature on American-type semi-industrial purse seiners. Regression analysis was performed to investigate the relationship between hull dimension ratios and vessel size from a database composed of 130 purse seiners of the Peruvian fleet. This work aimed to determine the effect of vessel size, as characterized by length, breadth, depth, gross tonnage, net tonnage, and fish hold capacity, on the main hull dimension ratios of purse seiners, i.e., length/breadth, length/depth, and breadth/depth. A compilation of hull statistics for the ship attributes and ratios was elaborated, with the findings indicating that length significantly affects the slimness of American-type semi-industrial purse seiners, whose structural strength and ship weight increase with length. These vessels exhibit an invariable minimum stability according to standard criteria since a breadth-to-depth ratio of 2 is maintained. In this vein, depth is half the value of breadth. The other parameters do not affect the hull dimension ratios. The estimated regression equations and the patterns presented in this research can be used in the preliminary design stage of American-type semi-industrial purse seiners.
En la etapa preliminar de diseño de barcos, se alcanzan las primeras aproximaciones de velocidad, estabilidad, estructura, pe so y costo, entre otros, mediante la selección de proporciones adecuadas para las dimensiones del casco. Esta investigación fue motivada por la notable falta de datos sistemáticos sobre estas proporciones en la literatura sobre los cerqueros semi-industriales de tipo americano. Se realizó un análisis de regresión para investigar la relación entre las proporciones de las dimensiones del casco y el tamaño del barco a partir de una base de datos compuesta por 130 cerqueros de la flota peruana. El objetivo de este trabajo fue determinar el efecto del tamaño del barco, caracterizado por su eslora, manga, profundidad, tonelaje bruto, tonelaje neto y capacidad de bodega de pescado, sobre las principales proporciones de las dimensiones del casco de los cerqueros, i.e., eslora/manga, eslora/profundidad y manga/profundidad. Se elaboró una recopilación de estadísticas del casco para los atributos y proporciones del barco, y los resultados indican que la eslora afecta significativamente la delgadez de los cerqueros semi-industriales de tipo americano, cuya resistencia estructural y peso aumentan con la eslora. Estos barcos presentan una estabilidad mínima invariable de acuerdo con los criterios estándar, pues se mantiene una proporción manga/profundidad de 2. En este sentido, la profundidad es la mitad del valor de la manga. Los otros parámetros no afectan las proporciones de las dimensiones del casco. Las ecuaciones de regresión estimadas y los patrones presentados en esta investigación pueden utilizarse en la etapa preliminar de diseño de los cerqueros semi-industriales de tipo americano.
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