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本文的主要内容是研究选择适合于中国近海航行的运输矿石、煤炭等散货专门船舶的最合理的船型方案。最合理船型方案的选择是以方案比较法进行的。方案比较的范围在详细研究了航线的各种营运经济条件后确定为六个吨位方案(5000,7000,9000,11000,13000,15000吨),七个速度方案(10,11,12,13,14,15,16节)并选择蒸汽透平为动力装置方案。 进行了上述各方案的技术营运计算,计算了各方案船舶第一近似的技术因素以及供比较分析用的主要营运经济指标,其中包括运输能力、成本、投资效果、造价盈利和投资牵制等,计算是在所选定的两条典型航线(八所——日本,秦皇岛——上海)上进行的。 经过对上述各方案的船舶营运经济指标的深入分析和比较后,作者选出了最合理的船型方案载重量为15000吨,营运速度为13节的燃煤蒸汽透平机船。动力装置功率为5000轴马力。 文中还指出了供技术设计参考的主要尺度要求,并建议使用适合于我国近海散货货流经济特点的在舱口围板内缘具有铰接隔板装置的货轮结构形式。
The main content of this paper is to study the most reasonable ship type scheme for selecting special bulk carriers for transportation of ore, coal and other suitable vessels for offshore navigation in China. The choice of the most reasonable ship type scheme is based on the program comparison method. The scope of comparison of the schemes was confirmed as six tonnage schemes (5000, 7000, 9000, 11000, 13000, 15000 tons) after detailed study on various operating economic conditions of the routes, seven speed schemes (10, 11, Sections 14, 15, and 16) and select a steam turbine as the powerplant solution. The technical operation calculation of each scheme above was carried out and the technical factors of the first approximation for each scheme and the main economic indicators for comparative analysis were calculated, including the transportation capacity, cost, investment effect, profitability of manufacturing and investment control, etc. It was conducted on the two selected classic routes (Japan-Qinhuangdao-Shanghai). After an in-depth analysis and comparison of the operating economic indicators of the various schemes mentioned above, the author has selected the most reasonable type of coal-fired steam turbine with a ship weight of 15,000 tons and an operating speed of 13 knots. Powerplant power of 5,000 shaft horsepower. The article also points out the main scale requirements for technical design reference and suggests the use of a ship structure with hinged bulkheads on the inner edge of the hatch coaming suitable for the economic characteristics of China’s offshore bulk cargoes.