Abstract
In this study, the simple method to isolate the ground vibration due to a construction machine, which is a rock drill, is proposed by using a dynamic damper. The ground is modelled by FEM and the external force is set as the repeated impact. The ground vibrations at some estimation points are calculated for various location of dynamic damper. As numerical results, the ground vibration is most suppressed when a dynamic damper is set near the vibration source and the dynamic damper increase the isolation effect of trench.
