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Submarine landslide process simulation method and system

A process simulation and landslide technology, applied in the field of marine engineering, can solve the problems of particle boundary density and pressure distortion, and achieve the effects of easy tracking, avoiding density and pressure distortion, and efficient incompressible fluid simulation

Pending Publication Date: 2021-12-07
SHANDONG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the above problems, the present invention proposes a submarine landslide process simulation method and system, which can obtain the variable sliding and accumulation characteristics of the submarine landslide body, and realize the effective simulation of the sliding and accumulation catastrophe process of the landslide body after the submarine landslide disaster occurs , judge the critical state of the particle model in real time, track the sliding or accumulation characteristics of the particles, and avoid the density and pressure distortion of the particle boundary during the solid-liquid conversion process

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  • Submarine landslide process simulation method and system
  • Submarine landslide process simulation method and system

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Embodiment 1

[0039] This embodiment only simulates the stage process of landslide mass accumulation after the occurrence of submarine landslide disaster, the landslide body has shown an obvious liquid sliding process, and aims to obtain the sliding and accumulation characteristics of the landslide mass movement process, so as to The occurrence scale, slip velocity and accumulation characteristics of the landslide are clarified, and finally provide the basis for the landslide early warning prediction and landslide risk assessment. In addition, due to the complex type of seabed strata, even after submarine landslides occur, the landslide body may still be accompanied by a solid sliding process of overall sliding, and gradually transform into a fast-sliding liquid landslide as it interacts with seawater during the sliding process. body.

[0040] Based on this, if figure 1 As shown, the present embodiment provides a simulation method for the sliding and accumulation process of the submarine l...

Embodiment 2

[0070] The present embodiment provides a submarine landslide process simulation system, including:

[0071] The model construction module is configured to construct a particle model of the landslide body after the gridless discretization of the submarine landslide body simulation area, and initialize the physical and mechanical parameter values ​​of the landslide body particles;

[0072] The constitutive equation determination module is configured to construct the compactly branched domain of adjacent particles of landslide particles. In each time step, the landslide particles in the compactly branched domain of adjacent particles are traversed to obtain the relative motion state and The stress tensor state of the landslide particles is used to judge the critical state of the landslide particles and select the corresponding constitutive equation;

[0073] The simulation module is configured to obtain the prediction-correction cycle results of solid-liquid boundary density and ...

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Abstract

The invention provides a submarine landslide process simulation method and system. The method comprises the following steps: carrying out meshless discretization on a submarine landslide body simulation region, constructing a landslide body particle model, and initializing physical and mechanical parameter values of the landslide body particles; constructing an adjacent particle tight branch domain of the landslide body particles, traversing the landslide body particles in the adjacent particle tight branch domain in each time step length to obtain a relative motion state among the landslide body particles and a stress tensor state of the landslide body particles, so as to judge a critical state of the landslide body particles and select a corresponding constitutive equation; according to the constitutive equation, obtaining a prediction-correction cycle result of a solid-liquid boundary density and pressure intensity, obtaining a density change rate, a stress change rate, and a momentum change rate of the landslide body particles, updating physical and mechanical parameter values of the landslide body particles according to the density change rate, the stress change rate and the momentum change rate of the landslide body particles, and within a set time step length, realizing effective simulation of the sliding and accumulation catastrophe process of a landslide body after a submarine landslide disaster occurs.

Description

technical field [0001] The invention relates to the technical field of marine engineering, in particular to a method and system for simulating a submarine landslide process. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Submarine landslides are a common geological disaster in marine engineering, and are widely distributed in offshore continental slopes, river estuaries, deep-sea valleys and other areas. Understanding the post-disaster evolution process of submarine landslides is beneficial to the development of submarine artificial sites and reclamation island reef slopes. Stability evaluation is beneficial to the smoothness of submarine communication optical cables, petroleum engineering facilities, and submarine waterways. Due to the hidden characteristics of submarine landslides, it is difficult to be observed intuitively. Usually, a...

Claims

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Application Information

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IPC IPC(8): G06F30/25G06F30/28G06F111/10
CPCG06F30/25G06F30/28G06F2111/10
Inventor 周宗青陈雨雪李利平刘聪成帅高上高成路
Owner SHANDONG UNIV
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