The safety limitation of large new-built seagoing ves- sel design and operation is investigated to ensure safety of the new vessels towed through bridge area. We analyze the maneuverabil- ity characteristics of a towi...The safety limitation of large new-built seagoing ves- sel design and operation is investigated to ensure safety of the new vessels towed through bridge area. We analyze the maneuverabil- ity characteristics of a towing fleet, and develop a mathematical drift model of ship motion for the fleet. Based on this drift model and the hydro-meteorological conditions in bridge area, we pro- pose a method to systematically ascertain the safety limitations of water stages, current, wind, speed and visibility. This method is conducive to the safety of both navigation and bridges when large towing fleets transit through bridges.展开更多
In the Song dynasty,when a high premium was placed on the development of foreign trade by sea,the undertakings of shipbuilding and navigation thrived to an unprecedented degree.According to archaeological discoveries,...In the Song dynasty,when a high premium was placed on the development of foreign trade by sea,the undertakings of shipbuilding and navigation thrived to an unprecedented degree.According to archaeological discoveries,multiple important breakthroughs were attained in shipbuilding technology at that time.First,watertight bulkheads became structurally improved and technologically mature.Second,there were various ways to joint multiple planks and different parts of a keel,embodying highly refined woodworking craftsmanship.Thirdly,bilge keels were in use,as were axial rudders that could move up or down,wood-and-stone anchors,and iron anchors.These technologies endowed such ship forms as the Fujian ship(Fuchuan福船)with excellent capabilities,bringing Chinese shipbuilding technologies to a peak in the Song dynasty.展开更多
基金Supported by the Key Projects of Golden Waterway Transit Capacity Improving Technologies(201132822430)
文摘The safety limitation of large new-built seagoing ves- sel design and operation is investigated to ensure safety of the new vessels towed through bridge area. We analyze the maneuverabil- ity characteristics of a towing fleet, and develop a mathematical drift model of ship motion for the fleet. Based on this drift model and the hydro-meteorological conditions in bridge area, we pro- pose a method to systematically ascertain the safety limitations of water stages, current, wind, speed and visibility. This method is conducive to the safety of both navigation and bridges when large towing fleets transit through bridges.
基金Funded by the National Key Research and Development Program of China[2020YFC1521805]the result of the subproject“Research on Structural Stability and Protection Technologies for Wooden Marine Shipwrecks”(海洋出水木质沉船结构稳定性与保护技术研究)of the project“Research and Development of Key Technologies for Protection of Wooden Marine Cultural Relics”(海洋出水木质文物保护关键技术研发)under the special project“Monitoring,Early Warning,and Prevention of Major Natural Disasters”(重大自然灾害监测预警与防范)
文摘In the Song dynasty,when a high premium was placed on the development of foreign trade by sea,the undertakings of shipbuilding and navigation thrived to an unprecedented degree.According to archaeological discoveries,multiple important breakthroughs were attained in shipbuilding technology at that time.First,watertight bulkheads became structurally improved and technologically mature.Second,there were various ways to joint multiple planks and different parts of a keel,embodying highly refined woodworking craftsmanship.Thirdly,bilge keels were in use,as were axial rudders that could move up or down,wood-and-stone anchors,and iron anchors.These technologies endowed such ship forms as the Fujian ship(Fuchuan福船)with excellent capabilities,bringing Chinese shipbuilding technologies to a peak in the Song dynasty.
