Utilizing a general purpose finite element approach for assessing the rotordynamic response of a flexible disk/shaft system

2014 ◽  
Author(s):  
Adam C. Wroblewski ◽  
Andrew L. Gyekenyesi
Keyword(s):  
Finite Element ◽  
General Purpose ◽  
Finite Element Approach ◽  
Shaft System ◽  
Element Approach ◽  
Flexible Disk

Finite Element Analysis of the Dynamics of Flexible Disk Rotor Systems

1982 ◽  
Author(s):  
J. A. Palladino ◽  
J. N. Rossettos
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
System Matrix ◽  
Element Analysis ◽  
Finite Element Approach ◽  
Rotor Systems ◽  
Rigid Disks ◽  
Blade System ◽  
Element Approach ◽  
Flexible Disk

The trend towards higher speeds and lighter weight rotor designs, particularly in gas turbine applications, has brought about the need to consider the flexibility of the total shaft-disk-blade system in the calculation of system frequencies and whirl modes. It has been traditional to assume that blades and disks are rigid, although recent work has been aimed at evaluating the assumption of rigid disks. These works have used Laplace transform and Liapunov methods and have been limited to simple geometries. This paper describes the development of a special shaft finite element which incorporates analytical solutions for disk dynamics and approximations of blade effects. It is shown that the addition of disk and blade dynamics does not increase the size of system matrix and that this approach can consider multiple disks. Because of the versatility of the finite element approach, complex configurations and boundary conditions can be considered.

A Finite Element Approach to the Transient Dynamics of Rolling Tires with Emphasis on Rolling Noise Simulation4

2007 ◽  
Vol 35 (3) ◽  
pp. 165-182 ◽  
Author(s):  
Maik Brinkmeier ◽  
Udo Nackenhorst ◽  
Heiner Volk
Keyword(s):  
Finite Element ◽  
Traffic Noise ◽  
Complex Eigenvalue ◽  
Arbitrary Lagrangian Eulerian ◽  
Finite Element Approach ◽  
Road Systems ◽  
Element Approach ◽  
Road Surface Roughness ◽  
Complex Eigenvalue Analysis ◽  
Rolling Noise

Abstract The sound radiating from rolling tires is the most important source of traffic noise in urban regions. In this contribution a detailed finite element approach for the dynamics of tire/road systems is presented with emphasis on rolling noise prediction. The analysis is split into sequential steps, namely, the nonlinear analysis of the stationary rolling problem within an arbitrary Lagrangian Eulerian framework, and a subsequent analysis of the transient dynamic response due to the excitation caused by road surface roughness. Here, a modal superposition approach is employed using complex eigenvalue analysis. Finally, the sound radiation analysis of the rolling tire/road system is performed.

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