Three-dimensional random seepage field simulation method and device based on finite elements

Abstract

The invention discloses a three-dimensional random seepage field simulation method and device based on finite elements, and belongs to the field of geotechnical engineering random seepage field simulation. Based on finite element grid integral point coordinates, a relationship between a permeability coefficient of a material and a temperature field is established through a UTEMP subprogram, and anon-uniform three-dimensional random seepage field in a three-dimensional space can be simulated and realized. In order to meet the requirement of the permeability grade of the material, the permeability coefficient is regarded as a random variable obeying uniform statistical distribution, and meanwhile, the correlation length in an autocorrelation function can be adjusted to reflect the correlation of the permeability property of the material in each direction of space. Generation of the three-dimensional random seepage field and finite element calculation are efficiently combined, the methodcan be applied to three-dimensional random seepage field models of any complex shape, and the calculation capacity and efficiency are effectively improved. The finite element calculation result can truly reflect the change rule of the seepage state under the condition that the permeability coefficient of the material is not uniform, and the uncertainty source of the total seepage flow of the model can be further clarified.

Description

technical field [0001] The invention belongs to the technical field of random seepage field simulation in geotechnical engineering, and more specifically relates to a finite element-based three-dimensional random seepage field simulation method and device. Background technique [0002] The flow of water in the porous medium is called seepage, and the space occupied by the water flow is called the seepage field. In geotechnical engineering and water conservancy and hydropower engineering, engineering accidents caused by water seepage are not uncommon. With the passage of time, engineering accidents such as landslides, underground tunnel collapses, deep foundation pit collapses, earth-rock dam failures, and urban ground subsidence have continued in recent years. The safety of engineering has attracted great attention from researchers and engineers. The fundamental reason is not that the strength itself is not enough, but to a large extent it is caused by the seepage of water ...

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Problems solved by technology

[0005] In view of the above defects or improvement needs of the prior art, the present invention proposes a finite element-based three-dimensional random seepage field simulation method and device, there

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