应力波入射充填节理的透射性能研究

刘亚强，贾帅龙，李善伟

摘要:

为了研究充填节理对不同频率应力波透射性的影响,根据充填节理特性设计了不同厚度和强度的节理模型,并对不同频率应力波正入射岩体节理的问题开展模拟,研究应力波在不同强度和宽度的充填节理条件下的反射和透射规律。结果表明：对于不同强度和厚度的充填节理,随着应力波频率的增加,其透射系数均逐渐减小,充填节理起到过滤高频波的“滤波”作用；随着频率的增加,透射系数逐渐减小,衰减速率先快后慢,并逐渐趋于稳定,且充填节理强度越低、宽度越大,该现象就越明显。

Abstract:

In order to study the effect of filled joints on the transmission of stress waves at different frequencies, the paper designs joint models with different thickness and strength according to the characteristics of the filling joint, and the jointing problem of normal incidence of stress waves with different frequencies is simulated to study the propagation law of stress waves in filled joints with different strengths and thicknesses. The results show: for filled joints with different strengths and thicknesses, the transmission coefficient decreases gradually with the increase of the frequency of the stress wave, and filled joints serve to the "filtering" effect of high frequency waves. The transmission coefficient decreases gradually with the increase of frequency and tends to a stable value as the frequency increases, the lower strength and the greater thickness, the phenomenon is more obvious.