Vibration analysis of variable thickness plates and shells by the Generalized Differential Quadrature method

2016 ◽  
Vol 156 ◽  
pp. 218-237 ◽  
Author(s):  
Michele Bacciocchi ◽  
Moshe Eisenberger ◽  
Nicholas Fantuzzi ◽  
Francesco Tornabene ◽  
Erasmo Viola
Keyword(s):  
Variable Thickness ◽  
Vibration Analysis ◽  
Differential Quadrature Method ◽  
Differential Quadrature ◽  
Quadrature Method ◽  
Generalized Differential Quadrature Method ◽  
Plates And Shells ◽  
Generalized Differential

Vibration analysis of a rotating variable thickness bladed disk for aircraft gas turbine engine using generalized differential quadrature method

2017 ◽  
Vol 231 (14) ◽  
pp. 2739-2749 ◽  
Author(s):  
B Shahriari ◽  
Mohammadhadi Jalali ◽  
MR Karamooz Ravari
Keyword(s):  
Gas Turbine ◽  
Variable Thickness ◽  
Vibration Analysis ◽  
Differential Quadrature Method ◽  
Differential Quadrature ◽  
Quadrature Method ◽  
Turbine Engine ◽  
Bladed Disk ◽  
Generalized Differential Quadrature Method ◽  
Generalized Differential

In this paper, free vibration analysis of rotating variable thickness annular bladed disk suitable to be used in aircraft gas turbine engine is investigated. The numerical generalized differential quadrature method is introduced in this paper as a fast and efficient numerical method to be used for vibration analysis of bladed disks of real gas turbine engines. The boundary conditions are supposed to be similar to those of the real bladed disk used in the aircraft engines i.e. clamped for the inner edge and free for the outer edge. Considering the thickness of the disk to vary as a power function and the blades of the bladed disk to be rigid, the numerical solution is performed and the effects of thickness variation, geometric parameters, angular velocity, and number of blades on the natural frequencies and critical speeds are investigated. The obtained numerical results are compared with those reported in the literature indicating a good agreement.

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