Towards Finite Element Model Updating Based on Nonlinear Normal Modes

2016 ◽  
pp. 209-217 ◽  
Author(s):  
Simon Peter ◽  
Alexander Grundler ◽  
Pascal Reuss ◽  
Lothar Gaul ◽  
Remco I. Leine
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Model Updating ◽  
Normal Modes ◽  
Element Model ◽  
Nonlinear Normal Modes ◽  
Finite Element Model Updating ◽  
Nonlinear Normal

Characterization of Nonlinear Coupled Dynamics in Sandwich Structures

2008 ◽  
Author(s):  
Ioannis T. Georgiou
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Geometric Nonlinearity ◽  
Sandwich Structures ◽  
Normal Modes ◽  
Element Model ◽  
Nonlinear Normal Modes ◽  
High Fidelity ◽  
Coupled Dynamics ◽  
Nonlinear Normal

In this work, the nonlinear coupled dynamics of a sandwich structure with hexagonal honeycomb core are characterized in terms of Proper Orthogonal Decomposition modes. A high fidelity nonlinear finite element model is derived to describe geometric nonlinearity and displacement and rotation fields that govern the coupled dynamics. Contrary to equivalent continuum models used to predict vibration properties of lattice and sandwich structures, a high fidelity finite element model allows for a quite detailed description of the distributed complicated geometric nonlinearity of the core. It was found that the free dynamics excited by a blast load and the forced dynamics excited by a harmonic force posses POD modes which are localized in space and time. The processing of the simulated dynamics by the Time Discrete Proper Transform forms a means to study the nonlinear coupled dynamics of sandwich structures in the context of nonlinear normal modes of vibration and reduced order models.

A new method for finite element model updating in structural dynamics

2010 ◽  
Vol 24 (7) ◽  
pp. 2137-2159 ◽  
Author(s):  
J.L. Zapico-Valle ◽  
R. Alonso-Camblor ◽  
M.P. González-Martínez ◽  
M. García-Diéguez
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Structural Dynamics ◽  
Model Updating ◽  
Element Model ◽  
New Method ◽  
Finite Element Model Updating

scholarly journals A finite element model updating method based on global optimization

2020 ◽  
pp. 107372
Author(s):  
Maria Girardi ◽  
Cristina Padovani ◽  
Daniele Pellegrini ◽  
Leonardo Robol
Keyword(s):  
Finite Element ◽  
Global Optimization ◽  
Finite Element Model ◽  
Model Updating ◽  
Element Model ◽  
Finite Element Model Updating
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