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Acoustic emission simulation method and system based on discrete element method

A technology of acoustic emission simulation and discrete element method, which is applied in the field of acoustic emission simulation, can solve the problems of high occupation of computing resources, poor authenticity, and inconsistency with the principle of simulated acoustic emission technology, and achieves saving computing time, high authenticity, and fast calculation speed. Effect

Active Publication Date: 2021-03-12
INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] The purpose of the present invention is to provide an acoustic emission simulation method and system based on the discrete element method, which solves the problems of inconsistent principles, poor authenticity, and large calculation resource occupation of the simulated acoustic emission technology in the prior art

Method used

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  • Acoustic emission simulation method and system based on discrete element method
  • Acoustic emission simulation method and system based on discrete element method
  • Acoustic emission simulation method and system based on discrete element method

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Embodiment

[0133] First, the acoustic emission test of shale under uniaxial compression was carried out, and the macroscopic mechanical parameters such as uniaxial compressive strength and Young's modulus of rock samples were obtained;

[0134] The experiment was reproduced by the discrete element software PFC. The size of the numerical calculation model is consistent with that of the rock sample, and the obtained stress-strain curve is as follows: Figure 5 As shown, the established numerical calculation model can reproduce the experimental process well;

[0135] Three monitoring points are evenly arranged in the axial direction and lateral direction of the surface of the model, respectively, with intervals of 20mm and 25mm, and are numbered 1-9 in turn. Such as Figure 6 shown.

[0136] Monitor the velocity waveform of 9 monitoring points;

[0137] Analyze the velocity waveform to obtain the acoustic emission count, energy and b value, and take No. 2 monitoring point as an example ...

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Abstract

The invention relates to an acoustic emission simulation method and system based on a discrete element method. The simulation method comprises the steps of: arranging monitoring points on the surfaceof a calculation model; monitoring the speed waveform of the monitoring point; and analyzing the speed waveform to obtain an acoustic emission number, energy and a b value. According to the method, the problems that a traditional acoustic emission simulation method is inconsistent in principle, poor in authenticity and too high in computing resource occupation can be solved.

Description

technical field [0001] The invention relates to the field of acoustic emission simulation, in particular to an acoustic emission simulation method and system based on a discrete element method. Background technique [0002] Understanding the fracture process of rocks is of great significance to many projects. However, there are few ways to visualize this process, and researchers often resort to other means to study it. The most important technical means is acoustic emission, whose main advantage is that it can realize non-destructive monitoring and continuous monitoring in the process of rock fracture. [0003] Indoor acoustic emission test on rock samples can get reliable acoustic emission results, but it often has many restrictions. For example, ISRM (International Society for Rock Mechanics, International Society for Rock Mechanics) has made strict regulations on the size and end surface roughness of rock samples, and field sampling is difficult to ensure the integrity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/25G06F111/10
CPCG06F30/25G06F2111/10G06F2119/10
Inventor 薛雷步丰畅翟梦阳黄晓林许超王昊宇
Owner INST OF GEOLOGY & GEOPHYSICS CHINESE ACAD OF SCI
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