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Method for calculating curved surface stress distributed in fluid based on numerical simulation

A technology of numerical simulation and distributed calculation, applied in the field of calculation to solve the force distribution of the surface, it can solve problems such as difficult to meet engineering applications, and achieve the effect of easy programming and calculation

Active Publication Date: 2018-05-11
POWERCHINA ZHONGNAN ENG
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Problems solved by technology

[0018] With the development of engineering technology, higher requirements are put forward for the force analysis of hydraulic structures, but the existing surface force calculation methods can hardly meet the needs of engineering applications, so there is an urgent need for a method that can accurately calculate the force of fluid Calculation method of surface force distribution

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  • Method for calculating curved surface stress distributed in fluid based on numerical simulation
  • Method for calculating curved surface stress distributed in fluid based on numerical simulation
  • Method for calculating curved surface stress distributed in fluid based on numerical simulation

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Embodiment Construction

[0042] During numerical simulation, the simulation space will be divided into several ordered grids. Such as figure 2 As shown in , if the simulated grid is a structured grid, the grid arrangement is in the form of a matrix. Each grid in the space will be assigned a coordinate order according to its coordinates (x, y, z), and assigned a serial number (i, j, k), where i is the serial number of the grid along the y direction, and j is the grid The serial number along the x direction, k is the serial number of the grid along the z direction. There is a grid interface between the grid and the grid. Such as image 3 As shown in Fig. 1, when analyzing the solid surface with the mesh, the model will generalize the solid surface (curve) into a complex shape (polyline) composed of several planes that is similar to the surface according to the mesh size and type. These planes, as opposed to solid surfaces, are called virtual faces. The virtual surface is a special grid interface. ...

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Abstract

The invention discloses a method for calculating curved surface stress distributed in fluid based on numerical simulation. In a calculating model, virtual faces and grid interfaces both have grid elements such as coordinates, sizes and pressure differences and both have the same mathematical and physical significance. The difference between the virtual faces and the grid interfaces relies on whether the face is generalized into a curved face or not. When iterative solution is conducted on the whole model, the grid interfaces not generalized into curved faces allow water flow to pass through, and the virtual faces generalized into curved faces do not allow water flow to pass through. That is, in model calculating, the virtual faces are curved surfaces. Thus, the stress of the curved faces can be obtained after obtaining the stress of the virtual faces. The stress distribution of the curved faces in a mathematical model can be accurately calculated and fine analyzed; in addition, for thecharacteristic that the curved face stress distribution calculation amount is large, a calculating logic conforms to a computer programming logic, and programming calculating is easy.

Description

technical field [0001] The present invention relates to a numerical simulation-based calculation method for the force distribution of curved surfaces in fluids, specifically a method for post-processing and recalculating the calculation results of mathematical models containing complex curved surfaces in fluids by using programs to solve the force distribution of curved surfaces Calculation method. Background technique [0002] In the field of engineering, engineering facilities with near-curved surfaces such as trash racks, water-proof curtains, and curved gates have the characteristics of complex shapes, difficult force calculations, and large calculations for force distribution. Most of the existing calculation methods divide the forces on these surfaces into two aspects: hydrostatic pressure and hydrodynamic pressure. When solving hydrostatic pressure, it is considered that the pressure conforms to the static pressure distribution. If one side of the surface is fluid an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 潘江洋黄膺翰邱进生颜剑波李翔曹栋华
Owner POWERCHINA ZHONGNAN ENG
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