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Calculation simulation method for soil body large-deformation flow

A simulation method and large deformation technology, applied in computing, special data processing applications, instruments, etc., can solve problems such as inability to effectively simulate large deformation and flow disasters of soil, achieve accurate simulation results and improve calculation efficiency

Active Publication Date: 2016-10-26
SHANXI PROVINCIAL RES INST OF COMM +1
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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the existing numerical calculation method cannot effectively simulate the large deformation flow disaster of the soil body, and then propose a calculation and simulation method for the large deformation flow of the soil body. The present invention combines the Hertzian friction formula and the Stokes formula Introduce the molecular dynamics calculation framework, use the Verlet algorithm to solve the integral process, and establish a solid-liquid coupled soil large deformation flow calculation model, which can realize the simulation of the large deformation flow process of the soil

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  • Calculation simulation method for soil body large-deformation flow
  • Calculation simulation method for soil body large-deformation flow
  • Calculation simulation method for soil body large-deformation flow

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Embodiment

[0107] The model box with a size of 40cm×10cm×12cm is placed horizontally, and the effective size of the inner box is 10cm×10cm×10cm, and the ordinary medium sand (particle size 0.25mm-0.5mm) is slowly and evenly loaded into the inner box until it reaches 8cm When the height is high, stop loading sand, and quickly remove the baffle of the inner connection box to make the sand flow.

[0108] Apply the calculation method of the present invention to simulate the flow of sand and soil in the model box, and the specific calculation steps are as follows:

[0109] (1) When using the molecular dynamics software LAMMPS to calculate, set the calculation area to be 40cm in length, 10cm in width, and 10cm in height, and the sand sample size should be 10cm in length, 10cm in width, and 8cm in height, and set the unit of the system as the reduced unit (dimensionless), the particle shape is regarded as spherical, the particle size distribution of sand particles is ignored, the boundary condi...

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Abstract

The invention discloses a calculation simulation method for soil body large-deformation flow. The method is based on a molecular dynamics (MD) method. In the method, a Newton motion equation is taken as a control equation; a Hertzian type friction formula and a Stokes formula are introduced to describe solid-solid particle interaction and solid-liquid particle interaction respectively; and a solid-liquid coupling soil body large-deformation flow calculation model is built in a process of solving an integral through a Verlet algorithm. Through adoption of the calculation simulation method, a basic dynamics feature and a motion rule of soil body particle complex flow can be presented; the research level of prevention and control of soil body large-deformation flow disasters in China is further perfected and raised; and meanwhile, a certain basis is laid for wide application and popularization of a molecular dynamics calculation method in the soil body large-deformation flow disasters.

Description

technical field [0001] The invention belongs to the calculation field of rock and soil mechanics, and relates to a calculation and simulation method for large deformation flow of soil. Background technique [0002] Large deformation and flow disasters of soil are mainly manifested in many forms such as slope instability, foundation pit deformation and damage, and ground subsidence, which seriously threaten the safety of human life and property. The analysis of large deformation of soil is of great significance for engineering design and disaster prevention and mitigation, but it has not been solved well. One of the key reasons is that the numerical calculation does not fully reflect the mechanical characteristics of large deformation of soil. The deformation process of the soil under a large stress state is a nonlinear large deformation state, and its deformation no longer conforms to the small deformation theory. In view of the fact that the traditional numerical calculatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 赵紫阳申俊敏张军孙志杰薛晓辉马林
Owner SHANXI PROVINCIAL RES INST OF COMM
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