【摘要】 基于直齿轮静力学分析的应力特征和瞬态动力学的应力时间子步历程，结合弹流润滑理论下的齿面摩擦因数，使用Workbench建立直齿轮接触疲劳寿命模型。通过弹性力学赫兹接触理论对静力学有限元仿真结果进行校核，确定应力历程输入中的放缩系数，估计材料的S-N曲线，并在Palmgren-Miner线性损伤理论框架下，利用nCode计算直齿轮接触疲劳寿命，得到寿命云图和危险节点位置。结果表明：齿轮接触疲劳的危险节点多出现在齿面沿齿宽方向线接触的两端位置，输入转速、负载转矩与接触疲劳寿命呈负相关，摩擦因数与接触疲劳寿命呈正相关，负载转矩对接触疲劳寿命的影响幅度最大。更多还原

【Abstract】 Based on the stress of spur gear static analysis and the stress sub-step history of transient dynamics, combined with the tooth surface friction coefficient under the EHL theory, a spur gear contact fatigue life model is established using Workbench. The results of the static FE simulation are calibrated by the Hertz contact theory, thus the deflation coefficients in the stress history input are determined. The S-N curve of the material is estimated, and the spur gear contact fatigue life is calculated using nCode in the framework of Palmgren-Miner linear damage theory to obtain a life cloud and the location of the hazard nodes. The results show that the dangerous nodes of contact fatigue of gears mostly occur at the two end positions of tooth surface along the tooth width direction of line contact, and the contact fatigue life is negatively correlated with input speed and load torque, positively correlated with friction coefficient, and maximally effected by the load torque.更多还原