Analysis of dynamic impact process of hydraulic pile hammer

ZHU Zhendong, TIAN Guofu
(School of Mechanical Engineering, Shenyang University of Technology, Shenyang 110870, China）

Abstract: In order to study the operational characteristics of hydraulic pile hammer and improve the impact resistance of the system, the movement states and forcebearing states of various components during impact process were analyzed. Then the mechanical model and the dynamical differential equation of the system based on vibration theory were established. With modal analysis method, the differential equation was solved. After the vibration law of the system was obtained, the derivative method was applied for obtaining the variation law of velocity, acceleration and interaction force between components, then the impact process was simulated and analyzed with the related software. The results show that the change of acceleration of anvil is intense during impact process, and some control measures are needed to restrain the fluctuation.
Key words: hydraulic pile hammer; anvil; impact; differential equation; modal analysis; simulation