本文目的是研究柔性线在水流中的形状与张力问题。首先 导出了线的无量纲平衡方程式,为简化问题提出广义佛洛德数Πω;讨论了临界角α_c,φ_c与广义佛洛德数Πω的义系。最后,利用龙格—库达数值积分方法,确定柔性线的几何形状,其中包括拖索、锚索与曳纲 同时,分析了水动侧向力r_s对曳纲与锚索几何形状的影响。 The purpose of this paper is to study the shape and tension of flexible lines in water flow. Firstly, the dimensionless equilibrium equation of the line is derived, and the generalized Florentian number Πω is proposed for the simplification problem; the critical angles α_c, φ_c and the generalized Florentian number Πω are discussed. Finally, the Runge-Kurda numerical integration method was used to determine the geometry of the flexible line, which included the towline, the anchor cable and the dragline. At the same time, the influence of the hydrodynamic lateral force r_s on the geometry of the dragline and the cable was analyzed.