船舶压载水系统的有限元仿真与监控界面设计

为了研究船舶压载水系统的工作原理以及对船舶稳性的影响.利用有限元方法,基于流体力学的基本原理对船舶压载水系统调节过程进行了仿真研究.在管路模块中,将整个管路划分为有限管元和节点,并根据流体力学基本原理建立整个管网的矩阵方程;在稳性调节模块中,利用小倾角公式,建立起船舶的稳性计算与调节模型.在此基础上,以某 4万吨油轮为母型船,采用MINIS通用仿真支撑系统和INTOUCH组态软件作为软件开发平台,开发了压载水系统仿真与监控软件.仿真结果表明,系统能够模拟压载水系统的动态工作过程,并通过压载水配载控制实现船舶的稳性调节要求.

FEM simulation of ballast water system in ships and a design of monitoring and control interface

The paper is mainly devoted to the study of working principle of ballast water system in ships and its influence on stability of ships.The finite element method was used to simulate the adjusting process of ballast water system in accordance with the basic principle of fluid mechanics.In the module of pipeline,the whole pipeline was divided into pipe elements and nodes.Following basic hydromechanics theory,the matrix equation for the entire pipeline network was established to calculate the pressure at each node and the flux for each pipe element.In the module of stability adjustment,small obliquity formula was employed to build up the model for stability evaluation and adjustment.On this basis,ballast water system simulation and control software for a 40000t oil tank was developed using MINIS and INTOUCH development softwares.The results indicated that the system can simulate the dynamic operating processes of a ballast water system and the control logic meets the requirements for effective marine stability adjustments.