Universal approach to polynomial chaos expansion for stochastic analysis of EM field propagation on convex obstacles in an UWB channel

2016 ◽  
Author(s):  
Piotr Gorniak ◽  
Wojciech Bandurski
Keyword(s):  
Stochastic Analysis ◽  
Polynomial Chaos ◽  
Polynomial Chaos Expansion ◽  
Chaos Expansion ◽  
Universal Approach ◽  
Em Field ◽  
Uwb Channel

scholarly journals Stochastic Analysis of the Eigenvalue Problem for Mechanical Systems Using Polynomial Chaos Expansion— Application to a Finite Element Rotor

2012 ◽  
Vol 134 (5) ◽  
Author(s):  
E. Sarrouy ◽  
O. Dessombz ◽  
J.-J. Sinou
Keyword(s):  
Finite Element ◽  
Stochastic Analysis ◽  
Polynomial Chaos ◽  
Polynomial Chaos Expansion ◽  
Chaos Expansion ◽  
Eigenvalues And Eigenvectors ◽  
Campbell Diagram ◽  
Complex Eigenvalues ◽  
Gyroscopic Effects ◽  
Rotor Model

This paper proposes to use a polynomial chaos expansion approach to compute stochastic complex eigenvalues and eigenvectors of structures including damping or gyroscopic effects. Its application to a finite element rotor model is compared to Monte Carlo simulations. This lets us validate the method and emphasize its advantages. Three different uncertain configurations are studied. For each, a stochastic Campbell diagram is proposed and interpreted and critical speeds dispersion is evaluated. Furthermore, an adaptation of the Modal Accordance Criterion (MAC) is proposed in order to monitor the eigenvectors dispersion.

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