Particle Flow Simulation Study on the Propagation Law of Stress Wave at Nonlinear Deformation Joints
Received date: 2022-11-16
Revised date: 2023-05-04
Online published: 2023-09-20
Rock joints have significant influence on the propagation of stress waves in jointed rock mass.Study on the propagation law of stress waves in jointed rock mass is of great practical significance and theoretical value for rock blasting，earthquake engineering and explosion protection.The code was written by FISH language to modify the normal stiffness of micro-joints in the smooth joint model，and a particle flow model of rock joints with nonlinear deformation characteristics was established.The propagation characteristics of stress waves across single nonlinear deformed joints were analyzed，and the influence laws of joint stiffness，stress wave amplitude and stress wave frequency on the transmission and reflection coefficients were obtained.The interaction mechanism between stress wave and joint was revealed from microscopic perspective.The results show that the joint equivalent stiffness has a great influence on transmission and reflection coefficients of the stress wave.The larger the equivalent stiffness is，the larger the transmission coefficient is，and the smaller the reflection coefficient is.When the joint stiffness reaches a certain critical value，the transmission coefficient increases slowly and tends to a constant value.With the increase of the amplitude of incident wave，the transmission coefficient is increasing and reflection coefficient is decreasing.The stress wave transmission coefficient decreases with the increase of incident wave frequency，and the joint shows high frequency filtering.
Weihua WANG , Ruixin HUANG , Jie LUO . Particle Flow Simulation Study on the Propagation Law of Stress Wave at Nonlinear Deformation Joints[J]. Gold Science and Technology, 2023 , 31(4) : 580 -591 . DOI: 10.11872/j.issn.1005-2518.2023.04.175
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