管路系统中热沥青流动特性的动态建模与仿真

Dynamic Modeling and Simulation of Flow Characteristics of Hot Asphalt in Pipeline System

摘要:

为了实现管路系统中热沥青流动的动态特性描述以解决沥青过程控制的精度问题,提出了基于键合图理论的热沥青管路系统模型的方法,即在热沥青管路系统温度一定的条件下,近似地用键合图理论构建热沥青这一非牛顿流体模型以及系统中的管道、泵、阀、流量计等各零部件模型,实现易于描述的管路系统中热沥青流动特性的工程化图示解法,为沥青管路系统元器件匹配的参数化设计提供了有力的理论支持.通过物理实验与系统仿真的稳态结果比较,证明了基于键合图理论的热沥青管路系统模型的方法有效性.

Abstract:

In order to achieve the description of flow dynamics of hot asphalt in pipeline system,and to solve the accuracy problems of process control of asphalt,this paper presents a hot asphalt piping system modeling way based on the theory of bond graph.Under certain temperature in the hot asphalt pipeline system,the nonNewtonian fluid model of hot asphalt,as well as the pipeline system,pumps,valves,flow meters and other parts and components models by using bond graph theory are established.The project solution of the flow characteristics of hot asphalt in pipeline system is realized,which is easy to describe,providing a strong theoretical support for parameters design of the components matching in asphalt piping system.The effectiveness of hot asphalt pipeline system model based on the bond graph theory is proved by a comparison of the steadystate results of physical experiment and system simulation.