Node flow optimal distribution method for improving transient hydraulic simulation precision of water supply series pipeline

Abstract

The invention discloses a node flow optimal distribution method for improving transient hydraulic simulation precision of a water supply series pipeline. According to the method, the flow distributioncoefficient of the intermediate node is optimized to minimize the influence of the flow distribution coefficient on transient flow calculation and analysis. Moreover, simplified errors generated by node flow distribution can be quantitatively evaluated through simplified error control thresholds, and effective control over the simplified process is achieved. Besides, the simplification operationof the method is sequentially carried out from the intermediate node with the smallest simplification error, the potential defect that the accuracy of the model is obviously reduced due to conventional node flow distribution is effectively overcome, and the reliability and the accuracy of the same-pipe-diameter series simplification operation can be ensured.

Description

technical field [0001] The invention relates to the field of urban water supply pipe networks, in particular to a node flow optimization distribution method for improving the accuracy of transient hydraulic simulation of water supply series pipes. Background technique [0002] With the development of science and technology and the improvement of residents' living standards, the informatization and intelligent management of urban water supply pipe networks is an inevitable development trend, and it is also an important part of my country's smart water construction. The establishment and application of the hydraulic model is an indispensable key part of the informatization and intelligence of the pipeline network, and it is also an important prerequisite for the leakage monitoring and optimal operation of the water supply pipeline network. In recent years, geographic information system (GIS) has been widely used in the information management of urban water supply system. GIS ...

AI Technical Summary

Problems solved by technology

However, when there is a sharp and obvious hydraulic state change in the pipe network (that is, the transient flow state), the conventional method does not take into account the complex influence of the node flow on the transient pressure wave propagation process during the transient flow process, so the middle node flow distribution There may be significant differences in the calculation and analysis results of transient flow before and after, which will lead to unreasonable design of transient prevention and control measures (function failure or cost waste), thus forming a major hidden danger to the safe operation and management of the pipeline network

From this point of view, there is still a lack of scientific, reasonable and effective methods for node flow distribution in the process of simplifying water supply series pipelines

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