Dynamics and Fatigue Analysis of Planetary Gear Trains under Random Loading

行星轮系(PGTS)在工业等领域有着广泛的应用。在一些应用中，PGT承受的载荷是随机的。风能行业的风力发电机组和石油天然气行业的定向钻井是两种具有代表性的以PGT为输电单元、承受随机载荷的场景。这些系统的振动引起的疲劳是工业中的一个突出问题，具有巨大的经济后果。然而，振动应力的随机性在很大程度上阻碍了准确的疲劳预测和适当的疲劳管理。

Planetary Gear Trains (PGTs) are widely used in industry and many other applications. In some of the applications, the loads to which the PGTs are subjected are random/stochastic. Two representative scenarios where PGTs are used as a transmission unit, and subjected to random loads include wind turbines in wind energy industry and directional drilling in oil and gas industry. Fatigue caused by the vibration in these systems is a outstanding issue in the industries, and has huge economical consequence. However, the random nature of the vibration stresses largely hinders accurate fatigue prediction and proper fatigue management.