直升飞机承受了多种动态负荷,从螺旋桨旋转轴、引擎振荡、振荡产生的压力波动、降落到有效负荷处理产生的高瞬态振动负荷。分析师担心这些负荷振动会对操作性能、飞行器的耐受力、以及设备和有效负荷的要求产生影响。其中,很多负荷都是周期性的,并与螺旋桨旋转系统相一致。旋转速度在1P或者2P(P=每转)情况下产生的垂直或者水平负荷是由转轴的不平衡性以及螺旋桨上升 The helicopter is subjected to a variety of dynamic loads, which drop from the pressure fluctuations created by the propeller rotation axis, engine oscillations, oscillations, to the high transient load generated by the payload handling. Analysts are concerned that these load vibrations can have an impact on operating performance, aircraft endurance, and equipment and payload requirements. Among them, a lot of load is periodic, and consistent with the propeller rotation system. The vertical or horizontal load generated when the rotation speed is 1P or 2P (P = per revolution) is determined by the imbalance of the rotating shaft and the propeller rising