Silverlight环境下的船舶冷却水管网系统动态仿真
发布时间：2018-11-26 07:56
【摘要】：由于船舶系统的自动化和集成化程度的不断提高,船舶冷却水管网系统愈来趋向复杂,传统的管路水力计算方法愈来愈难以满足船舶冷却水管网系统的水力计算要求,通过分析研究该类型管网系统的特点,本文将已有的管网计算方法进行改进,并应用到船舶管网计算中。 本文首先介绍管网水力计算的背景以及现状,再讲述管网水力的各种特性及管路沿程损失计算与局部损失计算的数学公式,从而确定出流量与压降特定的数学关系。引入图论,介绍图论中的基本关联矩阵和基本回路矩阵,生成树及余树,结合管网的水力分析,提出求解船舶管网的方法并采用解环方程法,解节点法及图论法对船舶管网系统进行水力求解。解环方程法主要依据是在满足流量连续性的前提下,通过调节船舶冷却水管网中环流量,使其满足能量守恒。解节点方程与解环方程相对应,在初步拟定节点压头的基础上,逐步调整以满足流量平衡性方程。图论法中采用将只对生成树的余树进行流量初分配,大大简化了管网中的计算过程。通过流量连续性方程和环能量方程,及基本关联矩阵和基本回路矩阵,分别使用哈代—克罗斯方法、拟牛顿法和图论法对管网求解做了详细说明。变化管网水力求解模型的建立,使得计算机求解更加方便,使得水力参数随着管网参数和拓扑结构的变化而动态变化。本文通过对已有管网的基本关联矩阵和基本回路矩阵做一系列的改变,动态生成新的能反映管网的矩阵,并利用计算机进行实时求解。在Silverlight环境下,使用XAML语言和C#语言设计低温淡水冷却系统模拟软件,对船舶低温淡水冷却系统进行实时动态仿真。 本文中船舶管网数学模型的建立和计算方法,不仅应用于冷却水系统,也可应用于船舶燃油系统、滑油系统所有的管网系统,与冷却水系统的区别主要体现在流体的粘度系数造成的水头损失不同,通过对粘度系数的修改,便能很好的应用到其他管网系统。
[Abstract]:With the increasing automation and integration of the ship system, the ship cooling water pipe network system is becoming more and more complex, and the traditional hydraulic calculation method is more and more difficult to meet the requirements of the ship cooling water network system hydraulic calculation. Based on the analysis and study of the characteristics of this type of pipe network system, this paper improves the existing calculation method of pipe network and applies it to the calculation of ship pipe network. This paper first introduces the background and present situation of pipe network hydraulic calculation, and then describes the hydraulic characteristics of pipe network and the mathematical formulas of pipe line loss calculation and local loss calculation, so as to determine the specific mathematical relationship between discharge and pressure drop. Introducing graph theory, introducing basic correlation matrix and basic loop matrix, generating tree and residual tree in graph theory, combining hydraulic analysis of pipe network, the method of solving ship pipe network is put forward and the method of solving loop equation is adopted. The solution node method and graph theory method are used to solve the hydraulic problem of ship pipe network system. On the premise of satisfying the continuity of flow, the method of solving the ring equation is mainly based on the regulation of the flow rate of the cooling water pipeline network to make it meet the conservation of energy. The solution nodal equation corresponds to the solution ring equation. On the basis of preliminary drawing up the nodal head, it is gradually adjusted to satisfy the flow equilibrium equation. In the graph theory method, the initial flow distribution of the residual tree of the spanning tree is adopted, which greatly simplifies the calculation process in the pipe network. By means of flow continuity equation, ring energy equation, basic correlation matrix and basic loop matrix, the solution of pipe network is explained in detail by using Hardy-Cross method, quasi-Newton method and graph theory method, respectively. With the establishment of hydraulic solution model for changing pipe network, it is more convenient for computer to solve the problem, and the hydraulic parameters change dynamically with the change of pipe network parameters and topological structure. In this paper, a series of changes are made to the basic correlation matrix and the basic loop matrix of the existing pipe network, and a new matrix which can reflect the pipe network is dynamically generated and solved in real time by the computer. In Silverlight environment, the simulation software of low temperature fresh water cooling system is designed by using XAML language and C # language, and the real time dynamic simulation of low temperature fresh water cooling system of ship is carried out. In this paper, the mathematical model of ship pipe network is established and calculated, which can be used not only in cooling water system, but also in ship oil system and slippery oil system. The difference between the cooling water system and the cooling water system is mainly reflected in the head loss caused by the viscosity coefficient of the fluid. Through the modification of the viscosity coefficient, it can be well applied to other pipe network systems.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U664.814
本文编号：2357869
[Abstract]:With the increasing automation and integration of the ship system, the ship cooling water pipe network system is becoming more and more complex, and the traditional hydraulic calculation method is more and more difficult to meet the requirements of the ship cooling water network system hydraulic calculation. Based on the analysis and study of the characteristics of this type of pipe network system, this paper improves the existing calculation method of pipe network and applies it to the calculation of ship pipe network. This paper first introduces the background and present situation of pipe network hydraulic calculation, and then describes the hydraulic characteristics of pipe network and the mathematical formulas of pipe line loss calculation and local loss calculation, so as to determine the specific mathematical relationship between discharge and pressure drop. Introducing graph theory, introducing basic correlation matrix and basic loop matrix, generating tree and residual tree in graph theory, combining hydraulic analysis of pipe network, the method of solving ship pipe network is put forward and the method of solving loop equation is adopted. The solution node method and graph theory method are used to solve the hydraulic problem of ship pipe network system. On the premise of satisfying the continuity of flow, the method of solving the ring equation is mainly based on the regulation of the flow rate of the cooling water pipeline network to make it meet the conservation of energy. The solution nodal equation corresponds to the solution ring equation. On the basis of preliminary drawing up the nodal head, it is gradually adjusted to satisfy the flow equilibrium equation. In the graph theory method, the initial flow distribution of the residual tree of the spanning tree is adopted, which greatly simplifies the calculation process in the pipe network. By means of flow continuity equation, ring energy equation, basic correlation matrix and basic loop matrix, the solution of pipe network is explained in detail by using Hardy-Cross method, quasi-Newton method and graph theory method, respectively. With the establishment of hydraulic solution model for changing pipe network, it is more convenient for computer to solve the problem, and the hydraulic parameters change dynamically with the change of pipe network parameters and topological structure. In this paper, a series of changes are made to the basic correlation matrix and the basic loop matrix of the existing pipe network, and a new matrix which can reflect the pipe network is dynamically generated and solved in real time by the computer. In Silverlight environment, the simulation software of low temperature fresh water cooling system is designed by using XAML language and C # language, and the real time dynamic simulation of low temperature fresh water cooling system of ship is carried out. In this paper, the mathematical model of ship pipe network is established and calculated, which can be used not only in cooling water system, but also in ship oil system and slippery oil system. The difference between the cooling water system and the cooling water system is mainly reflected in the head loss caused by the viscosity coefficient of the fluid. Through the modification of the viscosity coefficient, it can be well applied to other pipe network systems.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U664.814
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