机械

冲击钻机是灌注桩基础施工的一种重要钻孔机械,但目前对冲击钻机钻进系统的动力学特性缺乏全面认识。以GCD-1500型冲击钻机为研究对象,结合钢丝绳和弹簧柔性体,在ADAMS中建立由刚体和柔体耦合的冲击机构系统动力学仿真模型,初步分析系统的动力学过程,并在不同约束条件下,利用脉冲激励分析方法研究冲击机构局部多自由度系统的模态振动和识别模态频率,为系统振动控制提供依据,对冲击钻机的优化设计具有指导意义。

Percussive drill is an important drilling machine in grouting pile construction, but the dynamic characteristic of system is not understood completely. With the GCD-1500 cable drill including cable and spring flexible body for the study, the hybrid system dynamic model of percussive mechanism is built in ADAMS.According to the percussive drill virtual prototype model, the dynamic characteristic is analyzed. In different constraint conditions, the modal vibration of the local multi-freedom system is studied by simulation analysis with pulse excitation, and the modal frequency is identified. The result provides the basis for the system vibration control and valuable preferences for the optimal design.