以渐开线圆柱齿轮副为研究对象,基于弹性动力学建立了齿轮副动态分析有限元模型并对齿轮副啮合过程进行了模拟。计算了齿侧主应力、齿面接触应力以及弯曲应力沿齿宽方向的分布,得到了齿轮啮合过程中各临界位置的齿根动态弯曲应力时域历程,就单双齿啮合变化对齿根动应力的影响作出了讨论。分析了负载及转速对齿轮的啮合状态、齿根动态弯曲应力的变化和动应力的影响,为齿轮传动系统的设计提供了理论依据。 Taking the involute cylindrical gear pair as the research object, the dynamic finite element model of the gear pair was established based on the elastic dynamics and the gear meshing process was simulated. The main stress of tooth side, the contact stress of tooth surface and the distribution of bending stress along the tooth width direction were calculated. The time history of dynamic bending stress of tooth root at each critical position during gear meshing was obtained. The impact of stress is discussed. The influences of the load and speed on the gear meshing, the dynamic bending stress change and the dynamic stress were analyzed, which provided a theoretical basis for the design of gear drive system.