Model order reduction methods for geometrically nonlinear structures: a review of nonlinear techniques

C Touzé, A Vizzaccaro, O Thomas - Nonlinear Dynamics, 2021 - Springer
This paper aims at reviewing nonlinear methods for model order reduction in structures with
geometric nonlinearity, with a special emphasis on the techniques based on invariant …

High-order direct parametrisation of invariant manifolds for model order reduction of finite element structures: application to generic forcing terms and parametrically …

A Opreni, A Vizzaccaro, C Touzé, A Frangi - Nonlinear Dynamics, 2023 - Springer
The direct parametrisation method for invariant manifolds is used for model order reduction
of forced-damped mechanical structures subjected to geometric nonlinearities. Nonlinear …

Model order reduction based on direct normal form: application to large finite element MEMS structures featuring internal resonance

A Opreni, A Vizzaccaro, A Frangi, C Touzé - Nonlinear Dynamics, 2021 - Springer
Dimensionality reduction in mechanical vibratory systems poses challenges for distributed
structures including geometric nonlinearities, mainly because of the lack of invariance of the …

Frequency combs in a MEMS resonator featuring 1: 2 internal resonance: ab initio reduced order modelling and experimental validation

G Gobat, V Zega, P Fedeli, C Touzé, A Frangi - Nonlinear Dynamics, 2023 - Springer
This paper is devoted to a detailed analysis of the appearance of frequency combs in the
dynamics of a micro-electro-mechanical systems (MEMS) resonator featuring 1: 2 internal …

Reduced order modelling and experimental validation of a MEMS gyroscope test-structure exhibiting 1: 2 internal resonance

G Gobat, V Zega, P Fedeli, L Guerinoni, C Touzé… - Scientific Reports, 2021 - nature.com
Abstract Micro-Electro-Mechanical Systems revolutionized the consumer market for their
small dimensions, high performances and low costs. In recent years, the evolution of the …

Finite element computation of nonlinear modes and frequency response of geometrically exact beam structures

M Debeurre, A Grolet, B Cochelin, O Thomas - Journal of Sound and …, 2023 - Elsevier
An original method for the simulation of the dynamics of highly flexible slender structures is
presented. The flexible structures are modeled via a finite element (FE) discretization of a …

Reduced order modeling of nonlinear microstructures through proper orthogonal decomposition

G Gobat, A Opreni, S Fresca, A Manzoni… - Mechanical Systems and …, 2022 - Elsevier
Abstract We apply the Proper Orthogonal Decomposition (POD) method for the efficient
simulation of several scenarios undergone by Micro-Electro-Mechanical-Systems, involving …

Nonlinear dynamics of coupled oscillators in 1: 2 internal resonance: effects of the non-resonant quadratic terms and recovery of the saturation effect

ZA Shami, Y Shen, C Giraud-Audine, C Touzé… - Meccanica, 2022 - Springer
This article considers the nonlinear dynamics of coupled oscillators featuring strong
coupling in 1: 2 internal resonance. In forced oscillations, this particular interaction is the …

Generation and evolution of phononic frequency combs via coherent energy transfer between mechanical modes

J Sun, S Yu, H Zhang, D Chen, X Zhou, C Zhao… - Physical Review …, 2023 - APS
Phononic frequency combs represent the mechanical analog of optical frequency combs.
Several independent experimental studies have demonstrated the onset and evolution …

Nonlinear model order reduction of resonant piezoelectric micro-actuators: An invariant manifold approach

A Opreni, G Gobat, C Touzé, A Frangi - Computers & Structures, 2023 - Elsevier
This paper presents a novel derivation of the direct parametrisation method for invariant
manifolds able to build simulation-free reduced-order models for nonlinear piezoelectric …