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建立了直升机旋翼动力传动系统扭振的动力学模型,经过计算得出了旋翼桨叶的摆振集合型模态频率和振型,指出动力传动系统会对直升机旋翼摆振集合型模态产生显著影响,使得桨叶的摆振模态频率发生改变,通过直升机旋翼动力传动系统扭振频率试验验证了计算方法和结果的有效性。
The dynamic model of torsional vibration of helicopter rotors power transmission system is established. The modal frequencies and mode shapes of the rotor blades are obtained by calculation. It is pointed out that the powertrain system will produce remarkable effect on the collective mode of helicopter rotors The frequency of the shimmy mode of the blade is changed, and the validity of the calculation method and the result are verified by the torsional vibration frequency test of the helicopter rotor power transmission system.