支承对传动轴系稳态不平衡响应的影响研究

Research on Effect of Support on Drive Shaft System's Steady-state Unbalance Response

推导了基于经典梁的传递矩阵,用传递矩阵法分析了直升机水平传动轴的稳态不平衡响应。研究了粘弹性减振器的刚度和阻尼对水平传动轴系各元件一阶共振峰值的影响。结果表明,降低支承刚度,轴段的一阶共振峰值减小,支承处的振幅增大;增加支承阻尼,轴系中各元件的一阶共振峰值减小。减振器不仅提高了传动轴系的安全裕度,还减小了轴系的一阶共振峰值。

The transfer matrix is derived according to the classical beam theory. The steady-state unbalance response is analyzed by the transfer matrix method. The effects of the viscoelastic damper＇ s stiffness and damping on the drive shaft system＇ s first-order resonance amplitude peak are researched on. The results show that first-order amplitude resonance peak of the shafts reduces with the decrease in the supports＇ stiffness and its amplitude increases. The amplitude of shaft system decreases with the supports＇ damping increasing. The damper is used not only to improve the safety margin of the transmission shaft system, but also reduces the first critical speed amplitude.