基于ANSYS齿根裂纹对斜齿轮接触应力影响分析

Analysis on the contact stress of root crack on helical cylindrical gear based on ANSYS

为了探究齿根裂纹对斜齿圆柱齿轮接触应力的影响,建立斜齿轮啮合三维有限元模型,并基于手工分区控制网格划分策略对模型进行静态接触应力的仿真分析,通过与理论计算结果对比证实了此有限元方法的准确性;进而对斜齿轮有限元模型引入齿根裂纹,分析有裂纹和无裂纹两种运行状态下动态接触应力变化情况,结果表明:齿根裂纹使斜齿圆柱齿轮的最大接触应力波动加剧,断齿故障的发生概率增大。

For studying effect on contact stress of root crack on helical cylindrical gear, a three-dimensional finite element model of helical gear meshing was established, and the static contact stress of the model was simulated and analyzed based on manual partition control grid division strategy. The accuracy of the finite element method was verified by comparing with theoretical calculation results. Furthermore, the root crack is imported in the helical gear finite element model, and the dynamic contact stress changes under the two operating states of cracked and crack-free are analyzed. The results show that the root crack aggravates the maximum contact stress fluctuation of helical gear and increases the probability of tooth breakage.