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Open channel water transfer project hydrodynamic force real-time calculation method based on space-time step length adaptive technology

A real-time calculation and hydrodynamic technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve the problems of difficult determination of Courant value, low calculation rate, non-convergence, etc., and reduce the number of trial and error steps , Easy to operate and improve efficiency

Active Publication Date: 2021-12-10
CHINA INST OF WATER RESOURCES & HYDROPOWER RES +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] However, this method has certain disadvantages. On the one hand, the Courant value is not easy to determine. On the other hand, due to the uncertainty of the spatial grid step size and time grid step size, divergence and non-convergence are likely to occur during the calculation process, which makes the calculation It cannot be completed, and in the case of divergence, the time step needs to be reduced. The smaller the time step, the lower the calculation rate, which may not meet the real-time requirements of the system

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  • Open channel water transfer project hydrodynamic force real-time calculation method based on space-time step length adaptive technology
  • Open channel water transfer project hydrodynamic force real-time calculation method based on space-time step length adaptive technology
  • Open channel water transfer project hydrodynamic force real-time calculation method based on space-time step length adaptive technology

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Embodiment 1

[0063] Such as figure 1 As shown, in the present embodiment, a kind of open channel water diversion project hydrodynamic real-time calculation method based on time-space step size self-adaptive technology is provided, comprising the following steps,

[0064] S1. Construct a hydrodynamic simulation model based on Saint-Venant's equations;

[0065] S2. Based on the constructed hydrodynamic simulation model, set the internal and external boundary conditions of the channel,

[0066] S3. Based on the constructed hydrodynamic simulation model, set different time steps, calculate and obtain the space step adapted to the time step, and determine the variation law of the space step with the time step;

[0067] S4. Based on the constructed hydrodynamic simulation model, set different time steps, calculate and obtain the calculation running time corresponding to different time steps, and determine the change law of calculation running time with time step and space step.

[0068] In thi...

Embodiment 2

[0116] In this embodiment, taking the section from the ancient canal control sluice to the North Juma control sluice (referred to as "Jingshi section") of the water diversion project as an example, according to the method described in the present invention, the construction and calculation of the hydrodynamic real-time calculation model are carried out, and the analysis Calculate the relationship between time step size and computational efficiency.

[0117] The total length of the project is 1432 kilometers, of which the total length of the Jingshi section is 227km. The buildings along the line include 14 control gates, 13 water diversions, 12 retreat gates, 17 sections of inverted siphons, 108 sections of gradient sections, and 130 sections of channels. The channel length information As shown in Table 1. Complicated engineering conditions lead to a long time for hydrodynamic calculations, and it is difficult to meet the needs of real-time hydrodynamic calculations. The presen...

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Abstract

The invention discloses an open channel water transfer project hydrodynamic force real-time calculation method based on a space-time step length adaptive technology, and the method comprises the steps: S1, building a hydrodynamic force simulation model based on a Saint-Venant equation set; S2, setting internal and external boundary conditions of the channel based on the constructed hydrodynamic simulation model; S3, setting different time steps based on the constructed hydrodynamic simulation model, calculating to obtain space steps adaptive to the time steps, and determining a change rule of the space steps along with the time steps; and S4, on the basis of the constructed hydrodynamic simulation model, setting different time steps, calculating to obtain calculation operation time corresponding to the different time steps, and determining a change rule of the calculation operation time along with the time steps and the space steps. The method has the advantages that, on the basis of the space-time step length self-adaptive relation, the relation between the calculation time step length and the calculation efficiency can be obtained, and the efficiency of real-time calculation of the hydrodynamic force of the open channel water transfer project is effectively improved.

Description

technical field [0001] The invention relates to the technical field of one-dimensional hydrodynamic real-time calculation, in particular to a method for real-time hydrodynamic calculation of an open channel water diversion project based on time-space step size adaptive technology. Background technique [0002] With the development of society and economy, people's demand for water resources is increasing, and water diversion projects have become an important means to solve the problem of social water resource shortage, optimize the allocation pattern of water resources, and improve regional water supply security capabilities. Water transfer methods include two categories: non-pressurized open channel water transfer and pressurized pipeline water transfer. Among them, the open channel water transfer has the advantages of small project investment, low operating cost, large water transfer flow, and convenient construction, so it has been widely used in water transfer projects at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
CPCG06F30/13G06F30/20G06F2119/14
Inventor 张召雷晓辉李月强查桓刘玉敏陈广明宋有权朱杰景象王艺霖
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES