Hydrodynamic calculation method, equipment and medium of complex river network

A calculation method and hydrodynamic technology, applied in computer-aided design, design optimization/simulation, CAD numerical modeling, etc., can solve the problem of low calculation efficiency of finite volume method

Active Publication Date: 2020-10-23
PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the finite volume method is less computationally efficient than the finite difference scheme due to the fact that the time step size of its explicit calculation scheme is constrained by the Krona condition

Method used

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  • Hydrodynamic calculation method, equipment and medium of complex river network
  • Hydrodynamic calculation method, equipment and medium of complex river network
  • Hydrodynamic calculation method, equipment and medium of complex river network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] This embodiment discloses a complex river network hydrodynamic calculation method, such as figure 1 As shown, the following steps S1 to S5 are executed once for each time period (each time step); that is, after steps S1 to S5 are executed in the current period, step S1 to S5 is re-executed in the next period until the final period; where For each time period, the execution process of step S1 to step S5 in this embodiment is as follows:

[0090] Step S1, for each branch point in the river network, preset a water level value for each branch point as its initial predicted water level value; in this embodiment, the predicted water level value of the branch point calculated last in the previous period, As the initial predicted water level value of each branch point in the current period; if the current period is the initial period, a water level value is arbitrarily set for each branch point as the initial predicted water level value of each branch point.

[0091] Step S2, ...

Embodiment 2

[0166] This embodiment discloses a computing device, including a processor and a memory for storing executable programs of the processor. When the processor executes the program stored in the memory, the complex river network hydrodynamic calculation method described in Embodiment 1 is implemented. Specifically as follows:

[0167] Step S1, for each branch point in the river network, preset a water level value for each branch point as its initial predicted water level value;

[0168] Step S2, classifying the river course into a gentle slope river course and a steep river course according to the water surface gradient of the river course;

[0169] Step S3. Calculate the hydrodynamic parameters of each section of each river channel according to the current predicted water level value of each branch point in the river network; wherein:

[0170] For the gentle slope channel, the finite difference method is used to calculate the hydrodynamic parameters of each section of the gentl...

Embodiment 3

[0180] This embodiment discloses a storage medium, which stores a program. When the program is executed by a processor, the complex river network hydrodynamic calculation method described in Embodiment 1 is implemented, specifically as follows:

[0181] Step S1, for each branch point in the river network, preset a water level value for each branch point as its initial predicted water level value;

[0182] Step S2, classifying the river course into a gentle slope river course and a steep river course according to the water surface gradient of the river course;

[0183] Step S3. Calculate the hydrodynamic parameters of each section of each river channel according to the current predicted water level value of each branch point in the river network; wherein:

[0184] For the gentle slope channel, the finite difference method is used to calculate the hydrodynamic parameters of each section of the gentle slope channel;

[0185] For steep channels, the finite volume method is used t...

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Abstract

The invention discloses a hydrodynamic calculation method, equipment and medium of a complicated river network. The method of the invention firstly sets an initial predicted water level value for each branch point, and then classifies the river course; The hydrodynamic difference of each section is calculated by the method and the finite volume method; then according to the discharge of each channel section at each branch point, it is judged whether the flow rate of each channel section at each branch point satisfies the condition of flow conservation; When the flow conservation is satisfied but the number of iterations reaches the maximum value, the hydrodynamic parameters calculated above are used as the hydrodynamic calculation results; when the flow conservation is not satisfied and the number of iterations has not reached the maximum value, the correction value of the water level at the branch point is calculated. When the value is less than a certain value, the corrected water level value at the branch point will be used as the current predicted water level value of the branch point, and then enter the next iterative calculation; the method of the present invention has the advantages of fast calculation speed and strong stability.

Description

technical field [0001] The invention belongs to the technical field of hydrodynamic numerical simulation, and in particular relates to a complex river network hydrodynamic calculation method, a calculation device and a storage medium. Background technique [0002] Rivers and lakes are important resources for human survival and development, and provide human beings with important production and living resources. With the rapid development of society and economy in our country, the increase of population, the continuous acceleration of industrialization and urban modernization, and the rapid increase of social water consumption, people are increasingly developing and utilizing these water bodies. The hydrodynamic model of the river network is a mathematical model describing the water conservancy in the water area of ​​the river network. Hydrodynamic calculation of river network is often carried out by water conservancy, shipping and environmental protection departments. It ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F111/10
CPCG06F30/23
Inventor 胡晓张宋利祥杨聿胡凤蝶杨芳陈文龙李杰王汉岗杨志伟
Owner PEARL RIVER HYDRAULIC RES INST OF PEARL RIVER WATER RESOURCES COMMISSION
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