Parametric instability analysis of a rotating shaft subjected to a periodic axial force by using discrete singular convolution method

Meccanica ◽  
2016 ◽  
Vol 52 (4-5) ◽  
pp. 1159-1173 ◽  
Author(s):  
Zhiwei Song ◽  
Zhigang Chen ◽  
Wei Li ◽  
Yingbin Chai
Keyword(s):  
Axial Force ◽  
Parametric Instability ◽  
Rotating Shaft ◽  
Instability Analysis ◽  
Discrete Singular Convolution ◽  
Convolution Method

scholarly journals Dynamic Instability Analysis of a Rotating Ship Shaft under a Periodic Axial Force by Discrete Singular Convolution

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Wei Li ◽  
Zhiwei Song ◽  
Xuexia Gao ◽  
Zhigang Chen
Keyword(s):  
Axial Force ◽  
Dynamic Instability ◽  
Excitation Frequency ◽  
Constant Term ◽  
Rotating Shaft ◽  
Periodic Force ◽  
Instability Analysis ◽  
Instability Regions ◽  
Discrete Singular Convolution ◽  
Dsc Method

Dynamic instability of a rotating ship shaft subjected to a periodic axial force is studied by using discrete singular convolution (DSC) with regularized Shannon’s delta kernel. The excitation frequency is related to the spinning speed and the number of blades on the propeller. Effects of number of blades, constant term in the periodic force, and damping on dynamic instability regions are investigated. The results have shown that the increase of number of blades and damping could improve the dynamic stability of rotating shaft with damping. The increase of constant term in the periodic force leads to dynamic instability regions shifting to lower frequencies, making the shaft more sensitive to periodic force. Those dynamic instability regions obtained by DSC method have been compared with those by Floquet’s method to verify the application of DSC method to dynamic instability analysis of rotating ship shaft.

Gyroscopic modes decoupling method in parametric instability analysis of gyroscopic systems

2018 ◽  
Vol 34 (5) ◽  
pp. 963-969 ◽  
Author(s):  
Y. J. Qian ◽  
X. D. Yang ◽  
H. Wu ◽  
W. Zhang ◽  
T. Z. Yang
Keyword(s):  
Parametric Instability ◽  
Instability Analysis ◽  
Decoupling Method ◽  
Gyroscopic Systems
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