An agricultural tractor has a power take-off (PTO) driveline that is directly connected to the engine to improve its power transmission efficiency. The PTO driveline comprises various mechanical components coupled by a spline joint. The spline coupling tolerance causes collisions between various mechanical parts of the PTO driveline and affects gear collision, thereby causing rattle noise. Therefore, the aim of this study is to conduct a dynamic behavior analysis to predict the gear rattle noise level of a PTO driveline. The dynamic behavior of the PTO driveline was analyzed through 1D simulations, and the results confirmed that the dynamic behavior changes according to rotation speed. Experimental verification of the dynamic behavior analysis results confirmed that the dynamic behavior changes as the main engine excitation-component amplification changes and then decreases at a relatively high rotation speed. Additionally, the dynamic behavior changes of the PTO driveline resulted in a jumping phenomenon that occurs rapidly at a specific rotation speed. The amplification of the engine’s main components was reduced from 3 to 4 times to 1.2 times owing to the jumping phenomenon; the noise level of the gear rattle was also reduced by approximately 10.9 dB(A).

农用拖拉机的动力输出 (PTO) 传动系统直接连接到发动机，以提高其动力传输效率。PTO 传动系统包括通过花键接头连接的各种机械部件。花键联轴器公差导致取力器传动系统各机械部件之间发生碰撞并影响齿轮碰撞，从而产生咔嗒声。因此，本研究的目的是进行动态行为分析，以预测 PTO 传动系统的齿轮咔哒声水平。通过一维模拟分析了 PTO 传动系统的动态行为，结果证实动态行为根据转速而变化。动态行为分析结果的实验​​验证证实，动态行为随着主机励磁分量放大率的变化而变化，然后在较高转速下减小。此外，PTO 传动系统的动态行为变化导致在特定转速下迅速发生的跳跃现象。由于跳跃现象，发动机主要部件的放大倍数由原来的3-4倍降低到1.2倍；齿轮拨浪鼓的噪音水平也降低了大约 10.9 dB(A)。由于跳跃现象，发动机主要部件的放大倍数由原来的3-4倍降低到1.2倍；齿轮拨浪鼓的噪音水平也降低了大约 10.9 dB(A)。由于跳跃现象，发动机主要部件的放大倍数由原来的3-4倍降低到1.2倍；齿轮拨浪鼓的噪音水平也降低了大约 10.9 dB(A)。