SPH simulation display method and system for whole submarine landslide catastrophe evolution process

A whole-process, catastrophic technology, applied in the direction of design optimization/simulation, etc., can solve the problem of difficult to effectively reveal the catastrophic evolution mechanism of submarine landslides, describe and display the evolution characteristics of slopes, etc., to ensure high-efficiency solution, high computational efficiency and accuracy. Effect

Pending Publication Date: 2021-12-07
SHANDONG UNIV
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Problems solved by technology

[0005] The obvious difference from onshore landslides is that during the occurrence of submarine landslides, the landslide body interacts with seawater, and the ratio of water to slope material changes constantly, and the physical and mechanical properties and physical state of the landslide body also change accordingly. Only a single It is difficult to

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  • SPH simulation display method and system for whole submarine landslide catastrophe evolution process
  • SPH simulation display method and system for whole submarine landslide catastrophe evolution process
  • SPH simulation display method and system for whole submarine landslide catastrophe evolution process

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Embodiment 1

[0035]Based on the above description, in one or more embodiments, a SPH simulation display method for the whole process of submarine landslide catastrophe evolution is disclosed. First, the calculation area is gridless and discretized into a certain number of SPH particles with different physical properties , assigning physical and mechanical information quality physical and mechanical parameters such as initial density, mass, stress, position, velocity, period, and amplitude to the particles; setting a no-slip boundary layer combining repelling particles and virtual particles at the boundary to compensate for the impact of boundary effects on the core Calculate the influence of the area; apply the seawater gravity and wave action on the seawater particles, convert the slope force and tectonic force on the slope body into the stress boundary condition of the slope particle calculation area, and apply it to the boundary layer particles. Apply displacement boundary conditions; se...

Embodiment 2

[0070] In one or more embodiments, a SPH simulation display system for the whole process of submarine landslide catastrophe evolution is disclosed, including:

[0071] The ionization module is used to discretize the calculation area of ​​the seabed slope and seawater into a set number of particles with different physical properties, and assign corresponding physical and mechanical parameters to each physical state particle; and set repelling particles and virtual particles outside the boundary combined no-slip boundary layer;

[0072] The force application module is used to apply the infinitely covered seawater gravity and periodic wave action on the seawater particles, and convert the slope force and tectonic force on the slope into the stress boundary condition of the slope particle calculation area, which is applied by the repulsion On the boundary particles composed of particles and virtual particles, displacement boundary conditions are applied at the same time;

[0073]...

Embodiment 3

[0077] In one or more embodiments, a terminal device is disclosed, including a server, the server includes a memory, a processor, and a computer program stored on the memory and operable on the processor, and the processor executes the The program realizes the SPH simulation display method of the whole process of submarine landslide catastrophe evolution in the first embodiment. For the sake of brevity, details are not repeated here.

[0078] It should be understood that in this embodiment, the processor can be a central processing unit CPU, and the processor can also be other general-purpose processors, digital signal processors DSP, application specific integrated circuits ASIC, off-the-shelf programmable gate array FPGA or other programmable logic devices , discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

[0079] The memory ma...

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Abstract

The invention discloses an SPH simulation display method and system for a whole submarine landslide catastrophe evolution process. The method comprises the following steps: dispersing a calculation region of a submarine slope body and seawater into a set number of particles with different physical state attributes, and endowing each physical state particle with corresponding physical and mechanical parameters; on an outer side of a boundary, arranging a non-slip boundary layer in which repulsive particles and virtual particles are combined; applying infinite covering seawater gravity and periodic wave action to seawater particles, converting land slope acting force and structural acting force borne by the slope body into stress boundary conditions of a slope body particle calculation area, applying the stress boundary conditions to boundary particles composed of the repulsive particles and the virtual particles, and applying displacement boundary conditions; in each calculation time step, determining a catastrophe evolution stage of the submarine slope body, selecting a system constitutive equation set corresponding to the catastrophe evolution stage, carrying out calculation solving in the single time step, and completing updating of particle physical and mechanical information of a solving domain; and displaying the particle physical and mechanical information at set time steps.

Description

technical field [0001] The invention relates to the technical field of submarine landslide catastrophe simulation, in particular to an SPH simulation display method and system for the whole process of submarine landslide catastrophe evolution. 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] Smoothed Particle Hydrodynamics is a mesh-free method that describes the state of the system through a series of particles. It is an adaptive Lagrangian particle method for simulating fluid flow. Compared with the traditional grid-based numerical method, the SPH method is self-adaptive, which makes the formula construction of SPH not affected by the arbitrariness of the particle distribution, and can naturally deal with problems with great deformation. The SPH method uses particles as a computational framework for approximating field variables. In the...

Claims

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Application Information

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IPC IPC(8): G06F30/25G06F30/28
CPCG06F30/25G06F30/28
Inventor 李利平陈雨雪周宗青刘聪成帅高上屠文锋
Owner SHANDONG UNIV
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