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现有的一些给水管网水力计算是基于用水量不随水压变化而变化为前提条件进行的,但是当管网水压不足时,实际的节点供水量小于原需水量要求.这种情况下水力计算应该反映出水压不足时的实际用水量受节点水压的影响.根据对二者关系的不同模拟方法,产生出多种不同的计算方法.本文就这一问题的主要计算方法作了一个总结和回顾,并分为显函数法和虚拟水池法两大类,同时对各种方法的特点做了评述,并对不同方法造成的计算结果的差异、收敛性和计算效率做了分析.最后指出,实测数据是提高模型精度的根本,算法的收敛性和效率还值得进一步研究.
Some of the existing water supply network hydraulic calculation is based on the water does not change with the pressure changes as a precondition, but when the pipe network pressure is insufficient, the actual node water supply is less than the original water requirements.In this case, the hydraulic The calculation should reflect that the actual water consumption when the water pressure is insufficient is affected by the water pressure at the node, and according to the different simulation methods for the relationship between the two, a variety of different calculation methods are produced.This paper makes a major calculation method of this problem Summarize and review, and divided into explicit function method and virtual pool method two categories, at the same time made a comment on the characteristics of the various methods, and the calculation results of the differences caused by different methods, convergence and computational efficiency are analyzed.Finally It is pointed out that the measured data is the basis of improving the accuracy of the model. The convergence and efficiency of the algorithm also deserve further study.