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
http://www.goldsci.ac.cn/article/2023/1005-2518/1005-2518-2023-31-4-580.shtml
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
李娜娜,李建春,李海波,等,2015.节理接触面对应力波传播影响的SHPB试验研究[J].岩石力学与工程学报,34(10):1994-2000.
|
沈明荣,陈建峰,2015.岩体力学[M].2版.上海:同济大学出版社.
|
石崇,张强,王盛年,2018.颗粒流(PFC 5.0)数值模拟技术及应用[M].北京:中国建筑工业出版社.
|
汤云坤,2021.充填节理岩体中应力波传播特性的颗粒流离散元数值模拟研究[D].西安:长安大学.
|
田振农,李世海,肖南,等,2008.应力波在一维节理岩体中传播规律的试验研究与数值模拟[J].岩石力学与工程学报,(增1):2687-2693.
|
王卫华,李夕兵,左宇军,2006.非线性法向变形节理对弹性纵波传播的影响[J].岩石力学与工程学报,25(6):1218-1225.
|
王卫华,罗杰,刘田,等,2021.节理粗糙度对应力波传播及试样破坏影响的颗粒流模拟[J].黄金科学技术,29(2):208-217.
|
夏才初,孙宗颀,2002.工程岩体节理力学[M].上海:同济大学出版社.
|
许鹏,2017.爆炸应力波与含结构面岩体的相互作用及裂纹扩展研究[D].北京:中国矿业大学(北京).
|
颜鑫,2021.充填介质特性对节理岩体应力波传播影响试验研究[D].淮南:安徽理工大学.
|
曾超,曾亚武,赵凯,2018.节理接触面积和厚度对应力波传播特性影响的颗粒流数值模拟[J].水利与建筑工程学报,16(1):134-139.
|
/
〈 |
|
〉 |