A Split Three-Characteristics Method for Stress Wave Propagation Through a Rock Mass with Double-Scale Discontinuities
A Split Three-Characteristics Method for Stress Wave Propagation Through a Rock Mass with Double-Scale Discontinuities
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DOI：
10.1007/s00603-020-02233-w
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发表时间：
2020-09
影响因子：
6.2
通讯作者：
Wang M
中科院分区：
文献类型：
--
作者：
Fan L;Wu Z;Wang M
提出了一种可用于分析应力波在具有双尺度结构面（微缺陷（MD）和宏观节理（MJ））岩体中传播的分裂三特征法。研究了微扰和微扰对应力波传播的影响机理。将特征线划分为三角形、菱形和菱形分离单元3个基本单元，计算了应力波在双尺度结构面（MD-MJ）岩体中传播的应力、应变和速度。结果表明，MJ对应力波传播的影响与宏观节点刚度有关，而MD对应力波传播的影响与粘性系数和传播距离有关。对应力波在MJs和MD-MJs中传播的比较表明，传统的MJ模型可以看作是MD-MJ模型的特例，当传播距离足够短时，MDs的影响可以忽略不计。然而，当传播距离较长时，必须考虑MD的影响。结果还表明，本文的特征线方法可以有效地研究应力波通过双尺度结构面的传播。
A split three-characteristics method was proposed that can be used to analyze the stress wave propagation through a rock mass with double-scale discontinuities (micro-defect (MD) and macro-joint (MJ)). The mechanisms of the effects of MDs and MJs on stress wave propagation were investigated. The characteristic lines were divided into the three basic elements of triangle, diamond and separated diamond elements to calculate the stress, strain and velocity of the stress wave propagation through a rock mass with double-scale discontinuities (MD-MJ). The results show that the effects of MJ on stress wave propagation are related to the macro-joint stiffness, while the effects of MDs on stress wave propagation are related to the viscous coefficient and propagation distance. The comparison of the stress wave propagation through MJs and MD-MJs shows that the traditional MJ model can be regarded as a special case of the present MD-MJ model and the effects of MDs can be neglected when the propagation distance is sufficiently short. However, when the propagation distance is long, the effects of MDs must be considered. The results also show that the present characteristics method can be used to investigate the stress wave propagation through double-scale discontinuities efficiently.
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线性和非线性节理岩体斜入射数值研究
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