船舶压载水系统有限元仿真模型研究

利用有限元方法,基于流体力学基本原理建立了船舶压载水系统的仿真模型。压载水系统仿真模型包括管路子模块和稳性调节子模块。在管路模块中,利用有限元的方法将整个管路划分为有限个管元和节点,根据流体力学基本原理建立起总体管网的矩阵方程式,从而计算出整个管网中所有节点的压头值和每个管元中的流量值。在稳性调节模块中,利用小倾角公式,计算出船舶的稳性参数横倾角和纵倾角。在建立的仿真模型的基础上,实现了船舶压载水系统调节过程的仿真。仿真结果表明,建立的仿真模型可以实时反映出船舶压载水系统的调节过程。

Study on Finite Element Model for Simulation of Ship's Ballast System

The simulation model of ship's ballast system,which is mainly composed of the pipeline module and the stability regulating module,is established by means of the finite element method.In the pipeline module,the whole pipeline is divided into the finite pipe elements with two nodes.According to the basic hydromechanical theory,the entire matrix equation is established to calculate the press of each node and the flux of each pipe element.As the control parameters following the regulating strategy,the heeling angle and the trimming angle are calculated in accordance with the small obliquity formulas.Results show that the model established can represent the real-time regulating process of the ballast system and keep ship's stability.