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Adaptive Correction Method of Model Mesh under Extremely Compressive Deformation

A compression deformation and self-adaptive technology, applied in CAD numerical modeling, special data processing applications, design optimization/simulation, etc., can solve problems such as calculation termination, inability to meet calculation requirements, mesh deformity, etc., and achieve feasible implementation. sexual effect

Active Publication Date: 2022-04-19
POWERCHINA HUADONG ENG COPORATION LTD
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Under normal circumstances, the deformation of the calculation model is very limited, especially in the geological analysis, when the grid is squeezed by the tectonic stress, it will face a very large deformation, which will inevitably cause the deformation of the grid , leading to the termination of the computation
Aiming at the above problems, using discrete element or gridless calculation may be a solution, but these methods cannot meet the calculation requirements under certain conditions, and it is necessary to choose finite element calculation

Method used

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  • Adaptive Correction Method of Model Mesh under Extremely Compressive Deformation
  • Adaptive Correction Method of Model Mesh under Extremely Compressive Deformation
  • Adaptive Correction Method of Model Mesh under Extremely Compressive Deformation

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Embodiment Construction

[0027] This embodiment is a method for self-adaptive correction of model grids under conditions of extreme compression and deformation, which specifically includes the following steps:

[0028] S01. Generate a quadrilateral feature grid, and encode the grid regularly, and open up additional information storage variables for the grid.

[0029] Generate horizontal n×m grids, and the grids are all tetrahedral grids, so there are n×m units and (n+1)×(m+1) nodes in total. According to the horizontal and vertical distribution of the grid, the horizontal and vertical units and nodes are encoded in the order of small to large, and Z is obtained for the grid unit ij =(i,j), get G for nodes pq =(p,q), where i represents the number of unit columns, 0≤i≤n-1, j represents the number of unit rows, 0≤j≤m-1; p represents the number of node columns, 0≤p≤n, q represents the number of node rows, 0≤q≤m.

[0030] In order to facilitate the subsequent grid adaptive update, this embodiment stores...

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Abstract

The invention relates to a method for self-adaptive correction of model grids under the condition of extreme compression and deformation. coordinates; calculate the updated coordinate position of the node correction; find the code of the grid unit where the node will fall, and perform linear interpolation on the displacement field of the node in the x and z directions according to the positions of the four nodes that make up the grid unit, and get The new coordinates of the nodes; traverse the grid units, and find the corresponding grid unit codes according to the new coordinates, and at the same time obtain the center coordinates of the grid units, linearly interpolate the stress and strain of the units where the new coordinates of all nodes are located, and obtain the strain information, and store the stress and strain information into the extra variables of the unit; re-traverse the nodes, and update the node coordinate position and node displacement information; re-traverse the grid unit, and update the unit stress and strain information.

Description

technical field [0001] The invention relates to a model grid self-adaptive correction method under the condition of extreme compression deformation. It is applicable to the fields of numerical model calculation and grid setting. Background technique [0002] Geotechnical numerical calculations involve a wide range of fields, including slopes, underground chambers, foundation pits, geological origin analysis, etc. In some calculations and analysis, ensuring the quality of the grid is the primary factor to ensure that the calculation can proceed. Under normal circumstances, the deformation of the calculation model is very limited, especially in the geological analysis, when the grid is squeezed by the tectonic stress, it will face a very large deformation, which will inevitably cause the deformation of the grid , causing the computation to terminate. Aiming at the above problems, using discrete element or gridless calculation may be a solution, but these methods cannot meet ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/23G06F111/10
CPCG06F30/23G06F2111/10
Inventor 徐全侯靖褚卫江刘宁曹爱武
Owner POWERCHINA HUADONG ENG COPORATION LTD
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