从动力学角度着重分析了一种快速抓弹机构。借助动态显式有限元方法 ,对该六个零件组成的机构整体进行了三维非线性结构数值模拟。结果分析表明 ,该机构安全可行 ;与动能相比 ,机构内能是主要的 ,最好应采取措施以防零件温度过高 ;整个机构各向等效惯性力均有振荡。有关分析结果为进一步工作提供了理论基础。 From the dynamic point of view, a rapid catch mechanism is analyzed. With the aid of dynamic explicit finite element method, the three-dimensional nonlinear structure numerical simulation of the six components is carried out. Analysis of the results shows that the mechanism is safe and feasible. Compared with kinetic energy, the mechanism can be the main, it is best to take measures to prevent the temperature of the parts is too high; the equivalent inertial forces of the whole body oscillate. The results of the analysis provide the theoretical basis for further work.