Numerical study on oblique incidence across rock masses with linear and nonlinear joints
Numerical study on oblique incidence across rock masses with linear and nonlinear joints
复制标题
线性和非线性节理岩体斜入射数值研究
DOI：
10.1007/s12517-015-2020-3
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发表时间：
2015
影响因子：
--
通讯作者：
Liu Bo
中科院分区：
文献类型：
--
作者：
Li Haibo;Liu Yaqun;Li Jianchun;Yang Fengwei;Liu Tingting;Xia Xiang;Liu Bo
应用二维离散元程序UDEC模拟了应力波在任意入射角下通过线性和非线性岩石节理的传播。首次对应力波斜入射到单个线弹性节理上的问题进行了数值研究。针对这种情况，分析了波型变换，并数值研究了透射系数和反射系数随节点刚度和入射角的变化。结果表明，数值模拟结果与已有的理论计算结果吻合较好，验证了UDEC模拟斜向入射应力波在单缝中传播的可行性。此外，斜入射波的传输通过一组平行的关节进行了研究，并与解析解进行比较时，关节是线性和非线性弹性，分别。数值结果表明，节理数目、节理间距以及节理的力学性质等参数对波在节理中的传播有很大的影响。研究结果可为揭示应力波在节理岩体中的传播规律和岩体在动荷载作用下的响应提供参考。
The two-dimensional discrete element program Universal Distinct Element Code (UDEC) is applied to simulate stress wave propagation across linear and nonlinear rock joints with arbitrary incident angles. The numerical study for stress wave obliquely impinging upon a single linearly elastic joint is firstly conducted. For this case, the wave-type transformation is analyzed and the variations of transmission and reflection coefficients with joint stiffness and incident angle are investigated numerically. It is found that numerical results agree well with those from existing theoretical methods, which demonstrates the feasibility of using UDEC to simulate the propagation of obliquely incident stress wave across a single joint. Furthermore, the transmission of obliquely incident waves across a set of parallel joints is investigated and compared with analytical solutions when the joints are linearly and nonlinearly elastic, respectively. The numerical results indicate that the parameters, such as the joint number, the joint spacing and the mechanical property of joints, have great influence on wave propagation through joints. The results in the present study may provide a reference for revealing stress wave propagation across jointed rock masses and the responses of rock masses subjected to dynamic loads.
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影响因子：
5.3
作者：
W. Lei;A. Hefny;S. Yan;J. Teng
通讯作者：
W. Lei;A. Hefny;S. Yan;J. Teng
影响因子：
--
作者：
L. Pyrak‐Nolte;L. Myer;N. Cook
通讯作者：
L. Pyrak‐Nolte;L. Myer;N. Cook
DOI：
10.1061/(asce)0733-9399(2006)132:6(641
发表时间：
2006-06
期刊：
Journal of Engineering Mechanics-asce
影响因子：
--
作者：
X. B. Zhao;Jian Zhao;A. Hefny;J. Cai
通讯作者：
X. B. Zhao;Jian Zhao;A. Hefny;J. Cai
DOI：
10.1016/s0148-9062(96)00022-8
发表时间：
1996-12
期刊：
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts
影响因子：
--
作者：
L. Pyrak‐Nolte
通讯作者：
L. Pyrak‐Nolte
影响因子：
6.2
作者：
Deng, X. F.;Zhu, J. B.;Zhao, J.
通讯作者：
Zhao, J.