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Landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation

A DEM-CFD and calculation method technology, applied in the field of landslide-advanced air impact effect calculation based on DEM-CFD coupled simulation, can solve the problem of not considering the influence of advanced air impact effect and so on

Pending Publication Date: 2022-06-14
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

However, the existing methods only analyze the macroscopic dynamic behavior of the landslide and the impact air wave movement process, but do not consider the microscopic mechanical behavior of the particle interaction inside the debris flow and the gas-solid coupling mechanism between the debris flow and the surrounding air. impact effect

Method used

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  • Landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation
  • Landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation
  • Landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation

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Embodiment 1

[0043] In this embodiment, the 2004 Chongqing Zengziyan collapse-advanced air shock effect disaster chain is taken as an example to explain the implementation process of the present invention.

[0044] see Figure 1-4 , the present invention provides a technical solution: a landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation, the specific steps are as follows:

[0045] see Figure 1-4 , the present invention provides a technical solution: a landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation, the specific steps are as follows:

[0046] Step 1: Use the preprocessing software Gambit to model the 3D terrain after the collapse and slip of the Zengziyan, select the tetrahedral mesh to divide, and export the mesh file;

[0047]Step 2: Import the mesh file into the finite element analysis software Ansys, create a fluid model for the air part of the Zangziyan collapsed terrain and set appropriate bound...

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Abstract

The invention discloses a landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation, and the method comprises the steps: carrying out the modeling, grid division, boundary condition setting and the like of a landslide three-dimensional terrain through pretreatment software, exporting a model file, importing the model file into Fluent and EDEM, and setting air simulation parameters in the Fluent; setting simulation parameters of the landslide particles in the EDEM; the method comprises the steps that gas-solid two-phase simulation data are kept unchanged, a simulation mode is switched into a transient state, a DEM-CFD coupling interface is connected, then Fluent and an EDEM are connected through the coupling interface, gas-solid two-phase flow simulation is conducted, the landslide movement process is simulated, and the forming and spreading process of the advanced air impact effect is generated till simulation is finished. According to the method, numerical simulation of the advanced air impact effect of the high-position landslide is realized through coupling simulation, and technical support is provided for disaster prevention and reduction of a high-position remote landslide disaster chain in a high mountain and valley area.

Description

technical field [0001] The invention belongs to a numerical simulation analysis technology for disaster prevention and mitigation of high-level remote landslide-advanced air impact effect, and a landslide-advanced air impact effect calculation method based on DEM-CFD coupling simulation. Background technique [0002] In recent years, affected by factors such as climate warming, strong earthquakes, shortening of the return period of extreme heavy rainfall, and human engineering disturbances, a large number of high-level remote landslides have been triggered in high mountain and canyon areas around the world, causing heavy casualties and property losses. High-level remote landslides are one of the geological disaster phenomena with extreme destructive power due to their extremely high destructiveness, instantaneousness, difficulty in prevention, and frequent chain-generated disasters. The pre-impacted air waves cause disasters, causing serious damage to houses and vegetation a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/23G06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 庄宇邢爱国常文斌
Owner SHANGHAI JIAO TONG UNIV
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