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应用前报(本刊上一期)导出的管路动态分布参数模型传递矩阵中基本元素的近似,可以推导出管内流体变量间各传递函数的近似表示式。这些近似式形式非常简单,均由比例、微分、积分,一阶惯性和二阶振荡环节的线性组合所组成,在所关心的频率范围内,和分布参数模型的原式相当一致。求解近似模型的整个计算过程都可以通过一个通用的计算机程序来实现。
The approximation of the basic elements in the transfer matrix of the dynamic distribution parameters of the pipeline derived from the previous report (this issue of the first issue) can be used to derive the approximate expressions of the transfer functions of the fluid variables in the pipe. These approximate forms are very simple and consist of a linear combination of proportional, differential, integral, first-order inertia, and second-order oscillatory components that are quite consistent with the original formulation of the distribution parameter model over the frequency range of interest. The approximate calculation of the approximate model can be achieved through a general computer program.