花岗岩中应力波传播试验与数值模拟分析  

Experimental and Numerical Simulation Analysis of Stress Wave Propagation in Granite

作　　者：高子涛 马泽瑞 汪书敏 王志亮[1] 尚晓梓 毕云飞 华正宇 缪逢晨 GAO Zitao;MA Zerui;WANG Shumin;WANG Zhiliang;SHANG Xiaozi;BI Yunfei;HUA Zhengyu;MIAO Fengchen(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;School of Economics and Management,Bengbu College,Bengbu 233000,China)

机构地区：[1]合肥工业大学土木与水利工程学院,安徽合肥230009 [2]蚌埠学院经济与管理学院,安徽蚌埠233000

出　　处：《矿业工程研究》2024年第3期29-35,共7页Mineral Engineering Research

基　　金：大学生创新创业资助项目(S202210359113);国家自然科学基金资助项目(12272119)。

摘　　要：为研究华山花岗岩中的应力波衰减规律,基于花岗岩一维杆状试件的摆锤冲击试验,探测和分析脉冲振幅衰减和信号传播特征.随后,采用LS-DYNA商业软件和Holmquist-Johnson-Cook(HJC)本构开展对应的动态试验数值模拟与分析,并将花岗岩岩杆应力波衰减时程的数值结果与试验结果对比,验证HJC本构参数对华山花岗岩的适用性,分析应力波在花岗岩中的传播及衰减规律.结果表明:华山花岗岩中应力波的振幅随传播距离增加呈指数衰减,衰减系数η约为0.181.HJC本构模型可有效模拟华山花岗岩中应力波的传播规律,并基于试验结果确定了相应的HJC本构模型参数,研究结果可为花岗岩矿山岩体爆破安全与稳定分析提供借鉴.To investigate the stress wave attenuation in Huashan granite,pendulum impact tests are conducted on one-dimensional granite bar specimens to detect and analyze pulse amplitude attenuation and signal propagation features.Subsequently,dynamic test simulations and analyses are performed using LS-DYNA commercial software with the Holmquist-Johnson-Cook(HJC)constitutive model.The numerical results of stress wave attenuation in granite rods are compared with experimental data to validate the applicability of the HJC parameters to Huashan granite and to analyze stress wave propagation and attenuation patterns.Results indicate that in Huashan granite,stress wave amplitude decays exponentially with increasing propagation distance,with an attenuation coefficientηof approximately 0.181.The HJC constitutive model effectively simulates stress wave propagation in Huashan granite,and the corresponding HJC model parameters are determined based on experimental results.These findings have provided valuable insights for the safety and stability analysis of mining explosions in granite rock masses.

关 键 词：花岗岩 应力波 冲击试验 衰减规律 数值模拟 

分 类 号：U451[建筑科学—桥梁与隧道工程]