【作者】 应堃；

【导师】 楚纪正；

【作者基本信息】 北京化工大学 ， 控制科学与工程， 2012， 硕士

【摘要】 流体管网是化工流程的重要组成部分，其运行效率与安全性对管网本身以及与之相连的设备的平稳运行有着重要影响。流体管网模型建立与求解的主要难点在于拓扑结构复杂多样、管路中压力-流量的非线性关系、管路与管路之间的耦合、系统Jacobi矩阵稀疏性较高以及初值估计对收敛速度的影响。论文在系统分析总结前人工作基础上，对化工过程连通性时变流体管网展开了以下研究工作：(1)为了满足以独立基本回路集为系统方程组、弦支流量为独立变量的稳态分析方法（简称共树弦流法）的需求，创造性地提出了管网拓扑结构发生各种改变情况下，关联矩阵与基本回路矩阵直接由原矩阵做局部变换得到的快速更新算法。(2)针对化工过程特点，利用共树弦流法，构造了一种连通性时变的流体管网模拟策略，并利用酒厂罐区验证了该方法的有效性。(3)在Linux集群系统上，进行了化工过程管网系统动态仿真的并行化初步尝试：将多个独立子网的稳态求解过程分配到多个处理器当中同时计算，计算完毕后再将各自的结果统一整理。结果表明，增加计算节点可显著降低计算时间。更多还原

【Abstract】 Pipeline networks are the major parts of large-scale chemical,petrochemical, petroleum refining and processing plants and various tankfarms. Their safe and efficient operation has a great significance for boththemselves and other pieces of equipment connected by them. The maindifficulties in modeling and solving pipeline networks are thecomplicated topology structure, the nonlinear relationship between flowand pressure in pipelines, the sparse of Jacobi matrix and estimate ofinitial value. Based on the analysis of the previous work, thesis launchedthe following research work of connectivity time-varying pipelinenetworks in chemical process:(1) In order to meet the demand of steady-state analysis method whichmake the independence basic circuit sets as system equations and chordflow as independent variable (Chord flow method), several proceduresare proposed to construct the incidence matrix and fundamental circuitmatrix of a graph directly from those of its parent graph or graphs whenthe topological of the pipeline network changes.(2) According to the characteristics of chemical process, the proposed model and topological analysis procedures are used to establish adynamic solver for a tank farm together with the chord flow method.Finally, the dynamic solver is applied to a tank farm of liquor forverifying the model and procedures.(3) In the Linux cluster system, the preliminary attempt of parallelismdynamic simulation of pipeline network of chemical process has beentaken: the process of several independent subnet steady solving aredistributed into multiple processors, the calculation results of eachprocessors are arrangement unified. The results show that the increasingof computing node can reduce the calculation time significantly.更多还原