双液压马达驱动沉桩系统的自同步理论

Self-synchronization Theory of Pile Sinking System Driven by Dual Hydraulic Motors

提出了一种双液压马达驱动振动沉桩机构,具有待机和沉桩两种自同步状态.介绍了其结构及工作原理,并建立了振动系统的动力学模型.推导出两激振器的无量纲耦合方程以及实现同步和同步稳定性判据,确定出两种状态的系统动力学参数范围.当桩机处于待机时,激振器处于远超共振状态,广义动态对称角为π,两偏心转子的激振力相互抵消;当桩机处于沉桩时,激振器处于亚共振状态,广义动态对称角为0,两偏心转子的激振力叠加.最终通过数值仿真进行了验证.

A dual hydraulic motor-driven vibrating pile sinking mechanism was proposed,which have two self-synchronization states of idle and pile sinking.The structure and working principle were introduced,and the dynamic model of the vibration system was established.The dimensionless coupling equation of the two vibration exciters and the criterion of synchronization and synchronization stability were deduced,and the system dynamic parameter range of the two states was determined.When the pile driver was in the idle state,the exciter worked on the far-super resonance state,the generalized dynamic symmetry angle equaledπ,and the excitation forces of the two eccentric rotors were offset;when the pile driver was in the piling state,the exciter worked on the sub-resonance state,the generalized dynamic symmetry angle equaled 0,and the excitation forces of the two eccentric rotors were superimposed.Finally,it was verified by numerical simulation.