锚杆钻车驾驶室落物冲击仿真分析

Simulation analysis of falling object impact on the cab of bolting rig

针对锚杆钻车驾驶室在井下作业过程中存在的潜在安全性问题,对钻车驾驶室顶棚冒顶工况进行了落物冲击仿真分析。首先对驾驶室整体模型进行三维建模及结构简化,参照工程机械行业标准选定落物冲击参数,对落锤冲击下驾驶室响应进行显式动力学仿真分析。分析结果显示:落锤冲击顶棚时应力幅值迅速超过材料屈服强度,使顶棚发生塑性变形,吸收了部分冲击能量;落锤动能减小时顶棚内能增加;当顶棚产生最大变形时应变能达到最大;随着落锤反弹,动能增加,内能降低,随顶棚变形恢复应变能减小。

Aiming at the potential safety problems of the cab on the bolting rig in the process of underground operation, this paper carried out the falling object impact simulation analysis for the roof falling condition of the cab on the bolting rig. A 3D modeling and structural simplification were carried out for the overall model of the cab. The falling object impact parameters were selected according to the construction machinery industry standards, and the cab response under the drop hammer impact was analyzed by explicit dynamic simulation.The analysis results showed that the stress amplitude rapidly exceeded the yield strength of the material when the drop hammer impacted the roof, causing plastic deformation of the roof and absorbing part of the impact energy. When the kinetic energy of the drop hammer decreased, the internal energy of the roof increased. When the maximum deformation of the roof occurred, the strain energy reached the maximum. With the rebound of the drop hammer, the kinetic energy increased and the internal energy decreased. The recovery strain energy decreased with the roof deformation restored.