Abstract：Nondestructive detection of stress wave in anchorage bolts is a kind of quick and effective detection method. In this paper，bolt and mortar in anchorage system are appreciatively considered as isotropic materials. Applying composite material theory，equivalent one-dimensional physical and mechanical model of bolt and mortar is founded and equivalent engineering parameters are determined. Based on one-dimensional wave theory，the propagation equation of stress wave in anchorage system is induced. The numerical simulation of flaws in anchorage system is carried out. Through adjusting the coefficients of the dominant equation，the dynamic response of defective anchorage system under impact load can be simulated. Through comparing and analyzing，it is shown that the simulated curves are in good agreement with the waveforms obtained from model test measurements. Analytical results in theory can preferably reflect the actual dynamic character in bolt. Consequently，the mode，exciting force function，the equivalent parameters and the results of numerical simulation are proved to be correct and effective. It will play an important role in increasing the accuracy of detection results.
