With the development of modem calculation means,the research of fluid network numerical method based on graph-theory becoming more deep.In connection with the numerical method analyzing fluid network based on graph-theory,the process of quasi-Newton method is decomposed,then,integrating with a practical fluid system,the difference between the method of constant resistance and variable resistance used to compute the system is analyzed,and the calculation results shows that using the variable resistance method can prove the precision of calculation,when the system initial flow and the iterative convergence value is large different.The variable resistance method can also be used for a large and complex fluid system.%现代计算方法和手段的进步,使得基于图论的流体网络解算方法研究不断深入.针对流体网络图论解算算法,分解了拟牛顿法的解算过程,并结合实际流体网络,首次提出了流体系统网络变流阻系数的解算方法,分析了采用管路恒流阻系数和变流阻系数的拟牛顿法在实际流体网络解算中的差异.计算结果表明:采用变流阻系数的拟牛顿法能够提高当流量初始化值与迭代收敛值相差较大时流体系统网络解算的精度,变流阻系数解算法为提高大型、复杂流体系统网络解算精度提供了一种有效的方法.
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