风流效应下船舶操纵运动数值模拟

Numerical simulation of ship maneuvering motion under wind and current effects

采用Fortran语言编程,从底层开发了基于平面二维非均匀流数学模型、船舶操纵运动数学模型,并进一步耦合风的影响,构建了基于风、流效应下的船舶操纵运动数学模型.以三峡库区某典型河段为例,进行了静风、均匀风、随机风效应下的船舶操纵运动数值模拟.结果表明,船舶在该河段内受风影响明显;随着风速与风向变化频率的增加,船舶操控难度相应增大;为避免海损事故,船舶需及时操舵.研究表明,该模型可较好地模拟风效应下船舶的操纵运动及航行状态,可为内河船舶的航行及操纵提供一定的参考.

Taking Fortran language as the platform,the mathematical model of two-dimensional non-uniform flow based on plane and the mathematical model of ship maneuvering were developed from the bottom layer,and by further coupling the influence of wind,the mathematical model of ship maneuvering motion based on wind and current effects was constructed.Taking a typical river section in the Three Gorges Reservoir Area as an example,the numerical simulation of ship maneuvering motion under calm wind,uniform wind and random wind effect was carried out.The results show that the ships are obviously affected by wind in this river section.With the increasing change frequency of wind speed and direction,the difficulty of ship control increases correspondingly.In order to avoid the marine accident,the ship must steer in time.The result shows that the model can better simulate the ship maneuvering motion and navigation status under wind effect,which can provide some references for the ship’s navigation and maneuvering in inland river.