Nonlinear Modal Substructuring of Geometrically Nonlinear Finite Element Models
@inproceedings{Kuether2014NonlinearMS,
title={Nonlinear Modal Substructuring of Geometrically Nonlinear Finite Element Models},
author={Robert J. Kuether},
year={2014}
}In the past few decades reduced order modeling (ROM) strategies have been developed to create low order modal models of geometrically nonlinear structures from detailed finite element models built in commercial software packages. These models are capable of accurately predicting responses at a dramatically reduced computational cost, but it is often not straightforward to determine which modes must be included in the reduction basis. Furthermore, much of the upfront cost associated with these…
Figures and Tables from this paper
figure 1 
table 1 
figure 2 
table 2 
figure 3 
table 3 
figure 4 
table 4 
figure 5 
table 5 
figure 6 
figure 7 
table 7 
figure 8 
table 8 
figure 9 
table 9 
figure 10 
table 10 
figure 11 
table 11 
figure 12 
table 12 
figure 13 
table 13 
figure 14 
table 14 
figure 15 
table 15 
figure 16 
figure 17 
figure 18 
figure 19 
figure 20 
figure 21 
figure 22 
figure 23 
figure 24 
figure 25 
figure 26 
figure 27 
figure 28 
figure 29 
figure 30 
figure 31 
figure 32 
figure 33 
figure 34 
figure 35 
figure 36 
figure 37 
figure 38 
figure 39 
figure 40 
figure 41 
figure 42
9 Citations
Nonlinear Modal Substructuring of Panel and Stiffener Assemblies via Characteristic Constraint Modes
- Engineering
- 2017
This work uses Craig-Bampton dynamic substructuring combined with characteristic constraint modes for interface reduction to examine the challenges associated with panel and frame assemblies, with a simple example motivating a discussion of current solutions and future challenges.
Accounting for Quasi-Static Coupling in Nonlinear Dynamic Reduced-Order Models
- Engineering
- 2020
Engineering structures are often designed using detailed finite element (FE) models. Although these models can capture nonlinear effects, performing nonlinear dynamic analysis using FE models is…
Modal Substructuring of Geometrically Nonlinear Plates
- Engineering
- 2017
This work considers model reduction of geometrically nonlinear finite element (FE) model of a plate structure developed in a commercial FE package. The structure is first divided into smaller…
Dynamic Substructuring of Geometrically Nonlinear Finite Element Models Using Residual Flexibility Modes
- Engineering
- 2017
A nonlinear dynamic substructuring approach using Residual Flexibility method for geometrically nonlinear structures is investigated. In order to reduce the model order of a geometrically nonlinear…
A non-intrusive model-order reduction of geometrically nonlinear structural dynamics using modal derivatives
- Engineering, Computer Science
- 2021
A nonintrusive distributed reduced‐order modeling framework for nonlinear structural mechanics—Application to elastoviscoplastic computations
- Computer ScienceInternational Journal for Numerical Methods in Engineering
- 2019
A framework that constructs reduced‐order models for nonlinear structural mechanics in a nonintrusive fashion and can handle large‐scale simulations is proposed and evaluated on two numerical applications involving elastoviscoplastic materials.
An augmented free-interface-based modal substructuring for nonlinear structural dynamics including interface reduction
- Engineering
- 2019
Nonlinear modeling of composite wing with application to UAV flight dynamic analysis
- Engineering
- 2020
A nonintrusive reduced order model for nonlinear transient thermal problems with nonparametrized variability
- Computer ScienceAdv. Model. Simul. Eng. Sci.
- 2020
The regularizing property of reduced order models, together with a nonintrusive approach, enables the use of commercial software to generate the data, even under some degree of uncertainty in the proprietary model or solver of the commercial software.
References
SHOWING 1-10 OF 141 REFERENCES
Evaluation of Geometrically Nonlinear Reduced-Order Models with Nonlinear Normal Modes
- Engineering
- 2015
Several reduced-order modeling strategies have been developed to create low-order models of geometrically nonlinear structures from detailed finite element models, allowing one to compute the dynamic…
Modal Substructuring of Geometrically Nonlinear Finite-Element Models
- Engineering
- 2016
The efficiency of a modal substructuring method depends on the component modes used to reduce each subcomponent model. Methods such as Craig–Bampton have been used extensively to reduce linear…
Nonlinear Modal Substructuring of Systems with Geometric Nonlinearities
- Engineering
- 2013
This work presents two modal substructuring techniques that can be used to predict the nonlinear dynamic behavior of an assembly, compatible with the finite element method, allowing for analysis of realistic engineering structures with global nonlinearities.
Validation of Nonlinear Reduced Order Models with Time Integration Targeted at Nonlinear Normal Modes
- Engineering
- 2016
The nonlinear reduced order models of large scale finite element models are used to approximate the nonlinear normal modes (NNMs) of detailed structures with geometric nonlinearity distributed throughout all of its elements to give a load-independent metric that may provide confidence in the accuracy of the ROM while avoiding the excessive cost of computing the complete NNM of the full order model.
Structural Modification of Nonlinear FEA Subcomponents Using Nonlinear Normal Modes
- Engineering
- 2014
Structural modification procedures are widely used to predict changes in the dynamics of a structure based on the addition of stiffeners, reinforcements, modifications of bolted joints, and payloads.…
A review of indirect/non-intrusive reduced order modeling of nonlinear geometric structures
- Engineering
- 2013
Reduced-order models for nonlinear response prediction: Implicit condensation and expansion
- Engineering, Biology
- 2008
Multiscale Reduced Order Models for the Geometrically Nonlinear Response of Complex Structures
- Engineering
- 2012
modeling techniques for the prediction of the response of complex structures exhibiting "large" deformations, i.e. a geometrically nonlinear behavior, and modeled within a commercial finite element…
Nonlinear reduced order modeling of complex wing models
- Engineering
- 2013
The focus of this paper is on the identification of nonlinear reduced order models for the prediction of the geometrically nonlinear structural response of cantilevered structures, including the wing…
Substructuring with Nonlinear Reduced Order Models and Interface Reduction with Characteristic Constraint Modes
- Engineering
- 2014
The proposed substructuring approach reduces a 12,861 DOF nonlinear finite element model down to only 22 DOF, while maintaining the accuracy to compute the first three NNMs of the full order model.