中文摘要：

基于导波理论,把锚固锚杆当做波导介质来考虑,建立了围岩—砂浆—锚杆的三层介质模型,并利用有限差分程序对锚杆系统在瞬态击振力作用下的动力响应进行了数值模拟分析.研究表明：当激发波频率一定时,围岩质量越好,耦合到锚杆中的能量越少,导波透射到围岩中的能量越多,锚杆底端反射波振幅越小;随着围岩质量的提高,波能量的衰减越来越小,高频波的衰减要比低频波的衰减大.研究结果可为锚杆检测及最优激发波的选取提供一定的借鉴意义.

英文摘要：

Based on the guided wave theory,the anchor bolt was considered as a waveguide medium to establish a rock-mortar-bolt three-medium model and a numerical simulation of the dynamic response of bolt system was made in the transient hit vibration by using the finite difference program.When the excitation wave frequency is given,the result is：the better the rock quality is,the less the energy couples to the bolt;the better the rock quality is,the more the energy transmits into the rock and the smaller the reflected wave amplitude is.When the excitation wave frequency is constant,the energy attenuation gets smaller and smaller with the rock quality getting better;the high-frequency wave attenuation was more than the low-frequency wave.The findings can provide some reference for rock bolt testing and for the selection of optimal wave for the testing purpose.