水深对船舶摇荡运动影响的数值方法研究

Numerical Methods for Impact of Water Depth on Ship Swaying Motions

随着船舶大型化、高速化的发展趋势,以及船舶数量的逐年增多,海上航行的船只不免在相对浅水域航行,浅水域会对船舶的航行状态产生影响,浅水效应是保障船舶安全航行所需考虑的重要因素。采用有限水深的三维势流理论,以某NPL型船模为例,分别对在其次浅水、浅水和超浅水条件下的纵摇和垂荡运动幅值响应函数进行了计算,并对纵摇和垂荡运动随水深的变化规律进行总结。

With the trend of large and high-speed ships,the number of ships is increasing year by year.As a result,it is not rare that ships at sea sail in relatively shallow waters.However,shallow waters will affect the state of ships.Thus,shallow water effect should be considered to protect the safe navigation of the ship.The limited depth of three-dimensional potential flow theory is used to calculate an NPL ship model's pitching and heaving motions amplitude response functions in different conditions of shallow water.Finally,the pitching and heaving movement variations with water depth are summarized.