考虑旋翼轴刚度的孤立旋翼固有特性计算

Isolated Rotor System Dynamic Characteristic Analysis Coupled to the Rotor-shaft Stiffness

对于装有叶间减摆器的的直升机旋翼,其集合型摆振二阶固有特性与旋翼轴的刚度有密切的关系,在以往孤立旋翼的计算中,没有考虑旋翼轴的刚度,认为旋翼在旋转中心是固支的,这样使得计算结果与实际情况有比较大的出入。本文通过建立一种新的计算模型与原来的模型进行对比,并结合扭振系统计算结果及试验数据分析不同建模之间的差异。

For a helicopter rotor system with dampers between two blades,it's collective lead lag mode is coupled to the rotor shaft,in the primary calculations.we have not consider the rotor shaft stiffness.In this paper,we give a new model,and have a comparison with the former model.