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依据弹性波理论,应力波斜入射线弹性节理时会发生波场分解。根据入射、透射及反射各波形的不同到时,运用离散元软件UDEC模拟应力波在含倾斜节理岩体中的传播并计算其透射、反射系数,并分析其波型转换规律。应力波斜入射单节理时,模拟得到的透射、反射系数随节理刚度、入射角度的变化规律,与已有的理论解是吻合的。应力波斜入射一组平行节理时,随着节理间距的增大,其同类波的透射系数Tpp、Tss先增大后减小,最后趋于稳定值;节理条数越多,Tpp、Tss越小。此外,不同条数的节理,透射系数达到最大值的临界节理间距值基本一致,但趋于稳定时的节理间距值随节理条数的增加而逐渐增大。
According to the elastic wave theory, the wave field decomposition occurs when the stress wave is obliquely incident on the elastic elastic joint. According to different incident, transmission and reflection waveforms, the discrete element software UDEC was used to simulate the propagation of stress wave in inclined jointed rock mass and calculate its transmission and reflection coefficients, and analyze the wave form conversion law. When the stress wave is obliquely incident on a single joint, the simulated transmission and reflection coefficients are consistent with the existing theoretical solutions with the variation of joint stiffness and incident angle. When the stress waves obliquely incident on a set of parallel joints, the transmission coefficients Tpp and Tss of the same type wave first increase and then decrease with the increase of the joint spacing, and finally tend to be stable. The more joints, the more Tpp and Tss small. In addition, the critical joint spacing values of the joints with different numbers and the maximum transmission coefficient are basically the same, but the joint spacing gradually increases with the increase of the joint number.