Effects of System Parameters of Blade with Loosely Assembled Dovetail Attachment on the Dry Friction Damping
Shangguan Bo1，Liu Yalin1 ，Xu Zili2
1. School of Energy and Power Engineering, Xi’an Jiaotong University, Xi’an 710049,China; 2. State Key Laboratory for Strength and Vibration of Mechanical Structure, Xi’an Jiaotong University, Xi’an 710049, China
Abstract：The numerical dovetail attachment dry friction model and lumped-mass-spring model are employed to compute the dynamic response of damping blades. The effect of some control parameters of damping structures on forced response is studied. The results show that the softening spring effect which gives rise to the non-linear response with a resonance peak bending towards lower frequencies. When the centrifugal force is changed from small to large, the amplitude decreases at beginning and then increases. There is centrifugal force value at some rotate speed of blade in which the resonant amplitude is least. There is an optimal value of friction coefficient on which the resonant amplitude is least, and the least amplitude is about 23% smaller than the biggest one. The resonant amplitude of the blade decreases and the resonance frequency increases with the contact stiffness coefficient climbing up. The amplitude of harmonic excitation force also affects the resonant frequency and amplitude of the blade system.
上官博;刘雅琳;徐自力. 燕尾型叶根松装叶片系统参数对干摩擦减振效应的影响[J]. , 2012, 31(19): 180-182.
Shangguan Bo;Liu Yalin;Xu Zili. Effects of System Parameters of Blade with Loosely Assembled Dovetail Attachment on the Dry Friction Damping. , 2012, 31(19): 180-182.
2012, Vol. 31 
