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Beach shallow sea water power simulation method

A technology of dynamic simulation and shallow water equation, applied in the field of dynamic simulation of shoal and shallow water, can solve the problems of insufficient dry-wet algorithm, huge amount of calculation, lack of bottom friction treatment method, etc., to improve calculation speed, high calculation efficiency, information high precision effect

Active Publication Date: 2016-01-20
OCEAN UNIV OF CHINA
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Problems solved by technology

[0005] In order to solve the problems of the existing simulation technology in dealing with the special dynamic environment of shallow sea, such as extremely large amount of calculation, insufficient dry-wet algorithm, and lack of accurate bottom friction processing method, the present invention proposes a shallow seawater dynamic The simulation method can solve the above problems

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Embodiment 1

[0025] Embodiment 1, in order to describe this technical solution more clearly and completely, first introduce some concepts involved in this technical solution, such as figure 1 As shown, it is a schematic diagram of the main grid and sub-grid divided in this embodiment, wherein the size of the main grid is Δx×Δy, the size of the sub-grid in each main grid is δx×δy, and the A2 plane is the mean sea level position, the A1 plane is the position of the water surface at a certain moment, η is the water level, hs is the water depth defined in the sub-grid, that is, the static water depth of the sub-grid, and Hs is the total water depth of the sub-grid.

[0026] This embodiment proposes a shallow seawater dynamics simulation method, including the following steps:

[0027] S1. Obtain the water depth data of the target sea area;

[0028] Shallow sea can be divided into several distinct parts, namely land, intertidal zone, tidal trench and open sea. Most of the intertidal area is ab...

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Abstract

The invention discloses a beach shallow sea water power simulation method, comprising following steps: (1) acquiring water depth data of a target sea area; (2) a grid dividing step: dividing the target sea area by adopting two sets of grids of main grids and sub grids; (3) acquiring distribution of a Manning coefficient; (4) establishing a boundary condition and an initial condition; (5) based on an improved shallow water equation, performing dispersion and calculation of the improved shallow water equation on the main grids, calculating a porosity theta, an equivalent water depth Y and an equivalent bottom friction coefficient Cd on the sub grids, and finally calculating and outputting flow rate and water level results of the target sea area. The beach shallow sea water power simulation method adopts the two sets of grids, namely the thicker main grids and the thinner sub grids. The main grids have higher calculation efficiency, the sub grids have higher information precision, and the method combines the advantages of the main grids and the sub grids, so that the calculation precision is improved while the calculation speed is improved.

Description

technical field [0001] The invention relates to a technique for simulating coastal dynamics, in particular to a method for simulating shallow seawater dynamics. Background technique [0002] Shallow sea refers to the near-shore tidal flat area with shallow water depth. Some shoal and shallow sea areas in my country are not only important natural reserves of tidal flats and wetlands, but also contain rich resources such as oil and natural gas, such as the Yellow River Delta area. During the development of the coastal zone, it is necessary to carry out numerical simulation of the sea area where the project is located to grasp the hydrodynamic laws of the sea area, predict the impact of project construction on hydrodynamic elements, ecological environment, landform, etc., for the rational development of the coast, scientific Protection provides guidance. [0003] In the shallow sea area, the tidal trenches develop in multiple levels, and the tidal trenches at all levels are c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 李华军武国相梁丙臣陈玉洁徐照妍
Owner OCEAN UNIV OF CHINA
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