Three-dimensional Stability Analysis Method of Submarine Slope Based on Strength Reduction Method

An analysis method and technology of reduction method are applied in the field of three-dimensional stability analysis of submarine slopes based on strength reduction method, which can solve problems such as the inability to meet research and engineering accuracy, and achieve the effect of improving calculation accuracy and simplifying process.

Inactive Publication Date: 2019-05-14
SECOND INST OF OCEANOGRAPHY MNR
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Problems solved by technology

[0003] At present, most ABAQUS finite element slope stability studies are based on the results obtained from traditional two-dimensional and three-dimensional finite element models, which can no longer meet the needs of research and engineering precision. A finite element that can specifically reflect the seabed topography is needed. Modeling to complete the numerical calculation work in the early stage of seabed slope stability

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  • Three-dimensional Stability Analysis Method of Submarine Slope Based on Strength Reduction Method
  • Three-dimensional Stability Analysis Method of Submarine Slope Based on Strength Reduction Method
  • Three-dimensional Stability Analysis Method of Submarine Slope Based on Strength Reduction Method

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Embodiment 1

[0064] Because the ABAQUS program model construction ability is not strong, especially dealing with the complex seabed surface is even more powerless. The GOCAD program can meet this requirement. GOCAD can quickly generate topographic surfaces through CAD. If the terrain is kriging interpolated by the finite difference method through the Surfer program, the three-dimensional topography will be smoother. The grid generated by GOCAD is consistent with the grid shape required by ABAQUS (hexahedral grid) and can be exported as an Excel file, which creates the possibility for the realization of the interface.

[0065] Based on the above discussion, the technical route of stability analysis is as follows: 1. Import the original CAD contour map into GOCAD for pre-processing to form basic contour points; 2. Import the generated contour into Surfer and use Gram Rigger interpolation method for data interpolation, and then import back to the GOCAD program to form the seabed surface; 3. ...

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Abstract

The invention relates to a method for analyzing three-dimensional stability of a submarine slope based on a strength reduction method.The method comprises following steps: S1, selecting a region to be analyzed; S2, performing pre-treatment to the region to be analyzed; S3, generating an exported excel file to be an ABAQUS import file. inp through an ABAQUS value interface program; S4, constructing a self-weight stress field; S5, making stability analyses; S6, analyzing a value calculating result.The method for analyzing three-dimensional stability of the submarine slope based on the strength reduction method has following beneficial effects: through the ABAQUS value interface program, the model can be exported into the ABAQUS; and calculations can be accurately made and corresponding research results can be obtained.

Description

technical field [0001] The invention relates to a slope stability analysis method, in particular to a three-dimensional stability analysis method of a seabed slope based on a strength reduction method. Background technique [0002] With the development of offshore engineering in my country, the potential geological hazards of the seabed, especially the instability of seabed slopes, have increasingly become an important factor threatening offshore engineering. Submarine landslide refers to the phenomenon that unconsolidated soft sediments or rocks with weak structural planes on the submarine slope slide along the weak structural planes in the slope under the action of external force. The research on the stability analysis method of submarine slope is still in the development stage. With the emergence and development of finite element, it is possible to analyze the stability and deformation of structures by using strict stress-strain method, which is gradually applied to the ...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor来向华张恒胡涛骏黄潘阳
OwnerSECOND INST OF OCEANOGRAPHY MNR