超大型油船分舱方案优化设计研究
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摘要
船体结构重量关系到经济性与环保性,是衡量船舶设计方案优劣的重要指标,为提高超大型船舶的市场竞争力,有必要开展超大船体轻量化设计。以一艘32万载重吨超大型油船为例,根据油船分舱布置的要求,在主尺度与船型确定的情况下,以降低总纵弯矩、减轻船体结构重量为优化目标,通过装载、完整稳性、破舱稳性、溢油指数、总纵强度的计算,对比分析多型式的分舱方案。重点研究变边舱分舱方法对降低总纵弯矩的效果及其规范适用性,分析变边舱分舱方案中的内壳舭部斜升角对总纵强度的影响,得到一型可同时降低在港状态中拱弯矩、航行状态中拱弯矩与中垂弯矩的变边舱分舱方案,以期应用于超大型油船船体结构的轻量化设计。
Hull structure concerns economic and environmental performances of the ship. In order to enhance the market competitiveness,it is necessary to carry out lightweight hull design for very large vessels. Taking a 320 K DWT VLCC as an example and according to the requirements in subdivision arrangement of oil tankers,multiple types of subdivision schemes are provided for reducing the longitudinal bending moment and lightening the weight of hull structure. The load,intact stability,damage stability,oil outflow index and longitudinal strength are calculated for every scheme,and the applicability of regulations in alterable wing tank subdivision is focused on. In addition,the influence of the inner skin's deadrise angle is investigated. An alterable wing tank subdivision scheme has been worked out for VLCC to reduce the hogging moment in harbor condition and the hogging and sagging moments in seagoing condition simultaneously.
Hull structure concerns economic and environmental performances of the ship. In order to enhance the market competitiveness,it is necessary to carry out lightweight hull design for very large vessels. Taking a 320 K DWT VLCC as an example and according to the requirements in subdivision arrangement of oil tankers,multiple types of subdivision schemes are provided for reducing the longitudinal bending moment and lightening the weight of hull structure. The load,intact stability,damage stability,oil outflow index and longitudinal strength are calculated for every scheme,and the applicability of regulations in alterable wing tank subdivision is focused on. In addition,the influence of the inner skin's deadrise angle is investigated. An alterable wing tank subdivision scheme has been worked out for VLCC to reduce the hogging moment in harbor condition and the hogging and sagging moments in seagoing condition simultaneously.
引文
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