In order to control the vibration of the involute spline coupling in aeroengine well and reduce the fretting wear, a bending–torsion coupling nonlinear vibration model of the involute spline coupling with the misalignment was proposed, and a dynamic meshing stiffness function with multiteeth engagement was established. Then, the influence of different misalignment, wear, and rotation speeds with different misalignment on the nonlinear vibration characteristics of the involute aviation spline coupling was explored. The result shows that with an increase of the parallel misalignment, the system experienced the state of a single period, a quasiperiod, multiperiod, and chaos but finally only alternated between the quasiperiod and the chaos state. The uneven wear of each tooth of the spline displayed a significant influence on the vibration of the spline coupling, and the influence of the uniform wear was smaller under given conditions here. Furthermore, with an increase of the speed, the larger the misalignment was, the more times the system entered or left the chaos state were. The model proposed here is found to be closer to the actual working conditions, and the analysis results can provide more accurate external load conditions for the prediction of the fretting damage of the spline coupling in aeroengine.

中文翻译：

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航空发动机渐开线花键联轴器平行不对中的非线性振动特性

为了更好地控制航空发动机渐开线花键联轴器的振动，减少微动磨损，提出了渐开线花键联轴器未对准的弯扭耦合非线性振动模型，并建立了多齿啮合的动态啮合刚度函数。 . 然后，探讨了不同的不对中、磨损、不同不对中的转速对渐开线航空花键联轴器非线性振动特性的影响。结果表明，随着平行偏差的增加，系统经历了单周期、准周期、多周期和混沌状态，但最终仅在准周期和混沌状态之间交替。花键各齿的不均匀磨损对花键联轴器的振动影响显着，此处给定条件下均匀磨损的影响较小。此外，随着速度的增加，错位越大，系统进入或离开混沌状态的次数就越多。发现本文提出的模型更接近实际工况，分析结果可为航空发动机花键联轴器微动损伤的预测提供更准确的外载荷条件。