Dynamic Response of High-piled Wharf Pile Subjected to Underwater Explosion

In order to study the dynamic response of high-piled wharf pile subjected to underwater explosion, pile was simplified as an elastically supported beam. The computational model of pile was established. The correctness of the calculation model was verified by theoretical analysis. The dynamic coefficient Kd was an index to the displacement and deformation of pile. In order to further investigate the dynamic response of pile, typical high-piled wharf piles subjected to shock wave load and bubble pulse load were analysed. The results show that horizontal stiffness has more impact on dynamic coefficient than torsional stiffness. The bubble pulse load poses a greater threat to pile than shock wave load. The peak load and load duration are the significant facts influencing dynamic coefficient in shock wave phase. The load duration is the significant factor influencing dynamic coefficient in bubble pulse phase.