基于非线性有限元方法的单点系泊系统的优化设计研究

Abstract

本文基于静力学原理，对系泊系统中的六个大部件进行了局部与整体的受力分析。列出了一系列物理学方程。并最终推导出了系泊系统的非线性微分方程模型。方程采用迭代法进行求解。根据锚链的结构，采用有限元方法中对应的结构方法。运用了非线性有限元方法进行计算，得出系泊系统的锚链方程。计算出锚链系统无抬升角限制的边界条件。对锚链进行了受力分析。使锚不会被轻易拖移，并且使钢桶尽量保持竖直的条件。找到了在风力、水流力的影响下，钢桶、钢管的倾斜角度、锚链形状、浮标的吃水深度和游动区域，以确保使系统稳定的条件。 Based on the principle of statics, this paper analyzes the force analysis of six large parts in mooring system. A series of equations of physics are listed. Finally, we derive the nonlinear differential equation model about mooring system, which is solved by iterative method. According to the structure of anchor chain, the corresponding structure method of finite element method is adopted. By using the nonlinear finite element method, this paper obtains the anchor chain equation of mooring system. To calculate the mooring system without lifting angle limit boundary condition, we analyze the stress of anchor, which cannot be dragged easily, and we try to keep the condition of vertical steel drum. We find the influence of wind power, water power, steel pipe, angle, shape, anchor buoy and draught of the swimming area, to ensure the stable condition of the system.