Side slope three-dimensional finite element mesh generation method under complex geological condition

Abstract

The invention discloses a side slope three-dimensional finite element mesh generation method under a complex geological condition. The method comprises the following steps that: 1) on the basis of a CAD (Computer-Aided Design) platform, extracting topographic contour and geological interface elevation point data; 2) establishing the mesh node data of target range plane projection; 3) on the basisof an inverse distance interpolation method, constructing three-dimensional mesh node data in the target range; 4) creating the mesh node and the unit of a specified node sequence to obtain a three-dimensional finite element mesh; and 5) checking the quality of the generated finite element mesh, and if the quality is not qualified, returning the step 3) to regenerate the finite element mesh. The method provides a feasible finite element mesh division thought, the three-dimensional finite element calculation mesh under the complex geological condition can be established at high efficiency and high accuracy, the quality and the amount of the finite element mesh can be effectively controlled, repeatability is high, simplified processing is not required, and a finite element calculation effectis good.

Description

technical field [0001] The invention relates to a method for generating a three-dimensional finite element grid, in particular to a method for generating a three-dimensional finite element grid for slopes under complex geological conditions, and belongs to the fields of hydraulic engineering and geotechnical engineering. Background technique [0002] In recent years, with the development of water conservancy projects in Southwest my country, many high slope problems have been brought about. Whether the rock slope is safe and stable affects the normal operation of the project itself. The analysis and evaluation of rock mass slope stability has become a Hot issues in the field of civil engineering. [0003] The finite element analysis method (FEM) is usually used for calculation and analysis of engineering structures, in which the quality of the finite element grid determines the accuracy and speed of numerical calculation. However, the finite element grid generation process i...

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Problems solved by technology

[0004] Purpose of the invention: The present invention provides a method for generating 3D finite element grids of slopes under complex geological conditions, aiming at the problems of high difficulty in 3D modeling of slopes and the inability of general commercial software to effectively control the quantity and quality of finite element grids in the prior art. This method can realize slope intelligent finite element grid division with high precision and high efficiency, which is used for finite element analysis and calculation

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