Effect of reinforced fibers on the vibration characteristics of fibers reinforced composite shaft tubes with metal flanges

2021 ◽  
pp. 114460
Author(s):  
Liangliang Qi ◽  
Caihong Li ◽  
Xuduo Yu ◽  
Wei Min ◽  
Han Shi ◽  
...  
Keyword(s):  
Vibration Characteristics ◽  
Reinforced Composite ◽  
Composite Shaft

scholarly journals Critical Speed Analysis of Fibre Reinforced Composite Rotor Embedded with Shape Memory Alloy Wires

2000 ◽  
Vol 6 (3) ◽  
pp. 201-213 ◽  
Author(s):  
K. Gupta
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Natural Frequency ◽  
Critical Speed ◽  
Substantial Variation ◽  
Phase Recovery ◽  
Numerical Examples ◽  
Fundamental Natural Frequency ◽  
Reinforced Composite ◽  
Composite Shaft

In the present analysis, the fundamental natural frequency of a Jeffcott and a two-mass rotor with fibre reinforced composite shaft embedded with shape memory alloy (SMA) wires is evaluated by Rayleigh's procedure. The flexibility of rotor supports is taken into account. The effect of three factors, either singly or in combination with each other, on rotor critical speed is studied. The three factors are: (i) increase in Young's modulus of SMA (NITINOL) wires when activated, (ii) tension in wires because of phase recovery stresses, and (iii) variation of support stiffness by three times because of activation of SMA in rotor supports. It is shown by numerical examples that substantial variation in rotor critical speeds can be achieved by a combination of these factors which can be effectively used to avoid resonance during rotor coast up/down.

scholarly journals Free Vibration and Damping of Rotating Composite Shaft with a Constrained Layer Damping

2016 ◽  
Vol 2016 ◽  
pp. 1-20 ◽  
Author(s):  
Yongsheng Ren ◽  
Yuhuan Zhang
Keyword(s):  
Free Vibration ◽  
Equations Of Motion ◽  
Beam Theory ◽  
Constrained Layer Damping ◽  
Rotating Shaft ◽  
Rotating Speed ◽  
Damping Characteristics ◽  
Reinforced Composite ◽  
Composite Shaft ◽  
Passive Constrained Layer Damping

The free vibration and damping characteristics of rotating shaft with passive constrained layer damping (CLD) are studied. The shaft is made of fiber reinforced composite materials. A composite beam theory taking into account transverse shear deformation is employed to model the composite shaft and constraining layer. The equations of motion of composite rotating shaft with CLD are derived by using Hamilton’s principle. The general Galerkin method is applied to obtain the approximate solution of the rotating CLD composite shaft. Numerical results for the rotating CLD composite shaft with simply supported boundary condition are presented; the effects of thickness of constraining layer and viscoelastic damping layers, lamination angle, and rotating speed on the natural frequencies and modal dampings are discussed.

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