Modeling and Dynamic Characteristics Study on the Hydraulic System of Double Acting Hydraulic Pile Hammer
Aiming at the significant dynamic changes in flow and pressure during the impact process of hydraulic pile hammer,as well as the nonlinear coupling characteristics of flow and pressure,a dynamic model of the double acting hydraulic pile hammer hydrau-lic system was established.The numerical method was used to solve the dynamic model of hydraulic pile hammer motion.Based on the relevant data of ultra large hydraulic pile hammer,the influence of hydraulic system parameter matching on the dynamic characteristics of hammer core displacement,velocity,acceleration,etc.was studied.The simulation results show that the dynamic characteristics of the pile hammer can be optimized by reasonably matching the key parameters such as charging pressure of the accumulator,hydraulic resist-ance,and hydraulic oil source flow rate,the control effects of fast striking speed and good system stability can be realized.
hydraulic transmissiondouble acting hydraulic pile hammerdynamic characteristicsdynamic model
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