基于RecurDyn的自行火炮推弹器磨损故障分析

Wear Fault Analysis on Shell-conveyer of Self-propelled Guns Based on RecurDyn

在Pro/E软件中建立自行火炮推弹器的三维实体模型,将模型简化后导入多体动力学软件RecurDyn中建立虚拟样机模型,结合实验数据对样机进行校核,验证其正确性。通过故障注入技术对样机分别注入链头磨损和链轮磨损2种典型故障,通过仿真分析得出故障值与正常值之间的差异。结果表明:链头磨损将会导致推弹器推弹过程中卡弹、掉弹和推弹不到位等危害情况的发生,严重影响系统的正常工作;链轮磨损会导致大链轮速度低于正常值,小链轮转轴速度的急剧变化,从而会使链条发生扭曲和链接错位,导致推弹力不足,无法将弹丸推送到位。该研究得出了典型故障模式下可能出现的故障危害表现特征,为该装备的故障状态监测与改性维修工作提供了一定的参考。

The software Pro/E was used to build the three dimensional solid model of the shell-conveyer of self-pro- pelled gun, and the model was simplified and imported into the multi-body dynamics software RecurDyn to build the virtual prototype model of it.The correctness of the prototype was verified by the experimental data.Two kinds of typical faults, the chain head wear fault and chain wheel wear fault was injected into the virtual prototype model by fault injection technique, and the difference between fault value and normal one was obtained by simulation analysis.The results show that the wear of the chain head could lead to the dangerous situations, such as jamming and falling of cartridge, incorrect rammer in the process of shell-conveyer,which seriously affects the normal operation of the system.The wear of chain wheel could lead to the speed of larger chain wheel lower than normal value, and the axial speed of smaller one varies drastically, thereby twist and dislocation of the chain are happened, so as to cause insufficient force by the shell-conveyer.The performance charac- teristics of dangerous faults possibly appeared certain reference to the state monitoring and i under the model of typical faults are obtain in this research ,which provides nnovative maintenance of self-propelled gun.