桩锤同步振动系统的机电耦合数值仿真分析与试验

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针对多桩锤控制同步时出现机电耦合作用影响控制效果的问题,对两桩锤间的机电耦合规律进行了研究。建立了打桩过程中＂锤-桩-土＂系统的动力学方程及两桩锤同步振动系统的机电耦合数学模型,据此建立了Matlab/Simulink仿真模型,对影响机电耦合的主要参数（电机转速差、初始相位差、土壤参数、安装位置与安装距离等）分别进行了数值仿真,发现机电耦合的结果是在一定的条件下可出现自同步现象（相位差收敛于零或某固定值）,通过仿真研究得出了基本的耦合规律。最后通过试验验证了数学模型与仿真结果的正确性。电机耦合规律分析结论为桩锤控制同步的控制策略的制定提供了理论依据。 In order to solve the problem of electromechanical coupling that influencing the control effect in the control of two vibration hammers,the influence law of electromechanical coupling is studied.The dynamics equations of the hammer-pile-soil system and electromechanical coupling mathematical model of two pile hammers synchronous vibration system are established,and then the simulation model is built with Matlab/Simulink.Base on the simulation model,some research of the numerical computation is done about the key parameters（motor speed difference,initial phase difference,soil parameters,the installation location and distance,etc.） respectively,which may affect the synchronization of the system.Simulation results shows that self-synchronization phenomena will appear in the pile hammer synchronous vibration system in some conditions,and the basic law is obtained.In the end,the mathematical models and simulation results were proved to be correct by experiments.The research results provide theoretical foundation for the synchronization control strategy of the pile hammer synchronous vibration system.