A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities

Large flexible aircraft are often accompanied by large deformations during flight leading to obvious geometric nonlinearities in response. Geometric nonlinear dynamic response simulations based on full-order models often carry unbearable computing burden. Meanwhile, geometric nonlinearities are caus...

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Autores principales:	Chao An, Yang Meng, Changchuan Xie, Chao Yang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	geometric nonlinearities reduced-order model substructure synthesis method dynamic transient response aircraft Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/a3df949e8b4b467f920ecbaff539e6bd
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id	oai:doaj.org-article:a3df949e8b4b467f920ecbaff539e6bd
record_format	dspace
spelling	oai:doaj.org-article:a3df949e8b4b467f920ecbaff539e6bd2021-11-25T15:57:44ZA Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities10.3390/aerospace81103442226-4310https://doaj.org/article/a3df949e8b4b467f920ecbaff539e6bd2021-11-01T00:00:00Zhttps://www.mdpi.com/2226-4310/8/11/344https://doaj.org/toc/2226-4310Large flexible aircraft are often accompanied by large deformations during flight leading to obvious geometric nonlinearities in response. Geometric nonlinear dynamic response simulations based on full-order models often carry unbearable computing burden. Meanwhile, geometric nonlinearities are caused by large flexible wings in most cases and the deformation of fuselages is small. Analyzing the whole aircraft as a nonlinear structure will greatly increase the analysis complexity and cost. The analysis of complicated aircraft structures can be more efficient and simplified if subcomponents can be divided and treated. This paper aims to develop a hybrid interface substructure synthesis method by expanding the nonlinear reduced-order model (ROM) with the implicit condensation and expansion (ICE) approach, to estimate the dynamic transient response for aircraft structures including geometric nonlinearities. A small number of linear modes are used to construct a nonlinear ROM for substructures with large deformation, and linear substructures with small deformation can also be assembled comprehensively. The method proposed is compatible with finite element method (FEM), allowing for realistic engineering model analysis. Numerical examples with large flexible aircraft models are calculated to validate the accuracy and efficiency of this method contrasted with nonlinear FEM.Chao AnYang MengChangchuan XieChao YangMDPI AGarticlegeometric nonlinearitiesreduced-order modelsubstructure synthesis methoddynamic transient responseaircraftMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAerospace, Vol 8, Iss 344, p 344 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	geometric nonlinearities reduced-order model substructure synthesis method dynamic transient response aircraft Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	geometric nonlinearities reduced-order model substructure synthesis method dynamic transient response aircraft Motor vehicles. Aeronautics. Astronautics TL1-4050 Chao An Yang Meng Changchuan Xie Chao Yang A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
description	Large flexible aircraft are often accompanied by large deformations during flight leading to obvious geometric nonlinearities in response. Geometric nonlinear dynamic response simulations based on full-order models often carry unbearable computing burden. Meanwhile, geometric nonlinearities are caused by large flexible wings in most cases and the deformation of fuselages is small. Analyzing the whole aircraft as a nonlinear structure will greatly increase the analysis complexity and cost. The analysis of complicated aircraft structures can be more efficient and simplified if subcomponents can be divided and treated. This paper aims to develop a hybrid interface substructure synthesis method by expanding the nonlinear reduced-order model (ROM) with the implicit condensation and expansion (ICE) approach, to estimate the dynamic transient response for aircraft structures including geometric nonlinearities. A small number of linear modes are used to construct a nonlinear ROM for substructures with large deformation, and linear substructures with small deformation can also be assembled comprehensively. The method proposed is compatible with finite element method (FEM), allowing for realistic engineering model analysis. Numerical examples with large flexible aircraft models are calculated to validate the accuracy and efficiency of this method contrasted with nonlinear FEM.
format	article
author	Chao An Yang Meng Changchuan Xie Chao Yang
author_facet	Chao An Yang Meng Changchuan Xie Chao Yang
author_sort	Chao An
title	A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
title_short	A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
title_full	A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
title_fullStr	A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
title_full_unstemmed	A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities
title_sort	substructure synthesis method with nonlinear rom including geometric nonlinearities
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a3df949e8b4b467f920ecbaff539e6bd
work_keys_str_mv	AT chaoan asubstructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT yangmeng asubstructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT changchuanxie asubstructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT chaoyang asubstructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT chaoan substructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT yangmeng substructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT changchuanxie substructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities AT chaoyang substructuresynthesismethodwithnonlinearromincludinggeometricnonlinearities
_version_	1718413397182119936

A Substructure Synthesis Method with Nonlinear ROM Including Geometric Nonlinearities

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