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Automatic meshing method of arch dam 3D mesh model for simulating the whole process from excavation to operation

A 3D grid and whole-process technology, applied in 3D modeling, instrumentation, design optimization/simulation, etc., can solve time-consuming problems

Active Publication Date: 2019-08-09
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

It is very time-consuming to subdivide in the mode of superelement

Method used

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  • Automatic meshing method of arch dam 3D mesh model for simulating the whole process from excavation to operation
  • Automatic meshing method of arch dam 3D mesh model for simulating the whole process from excavation to operation
  • Automatic meshing method of arch dam 3D mesh model for simulating the whole process from excavation to operation

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Embodiment Construction

[0104] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0105] The method for automatically subdividing the three-dimensional grid model of the arch dam disclosed in the present invention from simulating the whole process of excavation to operation comprises the steps of:

[0106] S1: Determine the three-dimensional space coordinate system of the arch dam according to the design data of the arch dam, obtain the x-z plane projection diagram of the center plane of the arch axis, and generate a two-dimensional grid model of the arch dam according to the x-z plane projection diagram of the center plane of the arch axis;

[0107] Such as figure 1 As shown, according to the arch dam shape diagram and the top view of the arch dam provided in the arch dam design data (known data), the three-dimensional space coordinate system of the arch dam is established. The direction of the y-axis is consistent with th...

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Abstract

The invention provides an automatic generation method of a three-dimensional arch dam mesh model capable of simulating a whole process from excavation to operation. The automatic generation method includes the steps of determining an x-z plane projection drawing according to design data of an arch dam, and generating a two-dimensional mesh model of the arch dam according to the x-z plane projection drawing; generating three-dimensional space surface meshes of an arch-axis central plane according to the two-dimensional mesh model; generating a three-dimensional space super-element model according to the three-dimensional space surface meshes; subdividing the three-dimensional space super-element model to generate a structural calculation super-element model of the arch dam; supplementing three-dimensional space meshes of an excavation area so as to generate the three-dimensional arch dam mesh model capable of simulating the whole process from excavation to operation. The built three-dimensional arch dam mesh model is regular in mesh shape and capable of simulating temperature stress calculation in the whole process involving excavation, placing and operation of the arch dam simultaneously. The automatic generation method has the advantages that mesh generation time is shortened substantially and modeling efficiency is improved greatly.

Description

technical field [0001] The invention relates to an automatic subdivision method for a three-dimensional grid model of an arch dam during the whole process from simulating excavation to operation, and belongs to the technical field of water conservancy and hydropower engineering. Background technique [0002] Finite element grid generation is an important research field that intersects engineering science and computing science. At present, the method of subdividing two-dimensional grids has been relatively perfect, and can be completed quickly according to design drawings and commercial software; for three-dimensional grids, regular Grids can be obtained by 2D grid stretching, and complex grids can be obtained by automatic subdivision of tetrahedral grids. For example, to subdivide a space 3D model with a relatively complex spatial shape and use hexahedral grids, it is necessary to establish superstructures one by one. unit block, and refine the superunit block one by one, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06T17/00
CPCG06F30/20G06T17/00
Inventor 朱振泱张国新汪娟王振红刘毅侯文倩
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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