Model updating of finite element model using optimisation routine

Prananta, B.B.; Kanakis, Toni; Vankan, J. M. J.; Houten, Rien van

doi:10.1108/aeat-02-2015-0064

Cited by 6 publications

(3 citation statements)

References 6 publications

(9 reference statements)

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“…Concerning the formulation of the optimization problem we choose to use the MAC value to represent the closeness between two vibration modes. The methodology that we present is close to the one described by Prananta et al [18] and Gupta et al [19], which they used to update finite element models to match experimental data. As described by Allemang [20], if {φ ri } is one of the reference eigenvectors, and {φ mj } is one of the eigenvectors from the current model, we define a matrix whose elements are…”

Section: Definition Of the Optimization Problem For Modal Similaritymentioning

confidence: 65%

Aeroelastic scaling of flying demonstrators: mode tracking technique

Colomer

Bartoli

Lefèbvre

et al. 2022

Mechanics & Industry

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Aeroelastic scaling theory shows that the design problem of aeroelastically equivalent scaled aircraft can be treated as a structural-only design problem if the aerodynamic shape and airflow properties of the full scale aircraft are preserved. In that case, the theory shows that it is sufficient to match the scaled natural mode shapes, frequencies and mass of the reference aircraft. In this paper, we present a new method for the dynamic scaling of flexible structures where the objective function is based on the modal assurance criterion (MAC). This criterion is used for a mode tracking strategy during the optimization process. Finally, we apply this method to a scaled version (1:5) of the uCRM wing, achieving an agreement greater than 99% on the average MAC value of the first 5 modes.

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Section: Definition Of the Optimization Problem For Modal Similaritymentioning

confidence: 65%

Aeroelastic scaling of flying demonstrators: mode tracking technique

Colomer

Bartoli

Lefèbvre

et al. 2022

Mechanics & Industry

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“…Algumas alternativas podem ser para seleção de parâmetros. O agrupamento dos parâmetros disponíveis, utilizado por Prananta et al (2016), conseguiu diminuir de 800 parâmetros a serem atualizados para 40 variáveis, mantendo a melhoria do método. A diminuição do tempo de processamento se torna ainda mais válida quando se pretende testar estratégias de otimização em mais de uma análise.…”

Section: Métodos De Atualizaçãounclassified

Atualização De Modelos Numéricos a Partir De Dados Experimentais Para Monitoramento Estrutural: Mapeamento Sistemático

Sena

Silva²,

Santos³

et al. 2022

REEC

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RESUMO: A necessidade de monitoramento em estruturas aumenta a demanda por novos métodos de monitoramento, uma vez que ensaios de vibração forçada se tornam inviáveis em estruturas de grande porte. O aumento do acesso a novas tecnologias possibilita o estudo de identificação modal de estruturas utilizando somente carregamento ambiente, seguido de atualização de modelos numéricos e possíveis detecções de danos. Seguindo essa temática, realizou-se um mapeamento sistêmico em base de dados com intuito de caracterizar os estudos relacionados a esse objeto de estudo. Termos lógicos foram inseridos na busca, seguidos de filtragem de aderência de título e resumo. Após a leitura dos resumos dos 1006 artigos resultantes da pesquisa inicial, 76 foram selecionados e analisados conforme a quantidade, ano de publicação e periódico publicado. Entende-se que o crescimento dessa pesquisa se deu após o início da década de 2000, indicando o acesso a processamento como principal fator determinante para aumento do interesse por parte dos pesquisadores. ABSTRACT: The need for monitoring in structures increases the demand for new monitoring methods, since forced vibration testing becomes unviable in large structures. Increased access to new technologies makes it possible to study the modal identification of structures using only environmental loading, followed by updating numerical models and possible damage detections. Following this theme, a systemic mapping was carried out in a database with the purpose of characterizing the studies related to this object of study. Logical terms were entered in the search, followed by title tacking and summary. After reading the abstracts of the resulting 1006 articles from the initial research, 76 were selected and analyzed according to quantity, year of publication and periodical published. It is understood that the growth of this research occurred in the beginning of the year 2000, indicating the access to processing as the main determining factor to increase the interest on the part of the researchers.

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“…This is at the core of the updating method herein employed. The modeling errors causing low correlation can be filled by the implementation of an optimization problem aiming at finding the model parameters values to minimize the numerical vs. experimental errors [28][29][30].…”

Section: Model Updating Strategymentioning

confidence: 99%

Model Updating and Aeroelastic Correlation of a Scaled Wind Tunnel Model for Active Flutter Suppression Test

Leone¹,

Balbo²,

Gaspari³

et al. 2021

Aerospace

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This article presents a modal correlation and update carried out on an aeroelastic wind tunnel demonstrator representing a conventional passenger transport aircraft. The aim of this work is the setup of a corresponding numerical model that is able to capture the flutter characteristics of a scaled aeroelastic model designed to investigate and experimentally validate active flutter suppression technologies. The work described in this paper includes different finite element modeling strategies, the results of the ground vibration test, and finally the strategies adopted for modal updating. The result of the activities is a three-dimensional hybrid finite element model that is well representative of the actual aeroelastic behavior identified during the wind tunnel test campaign and that is capable of predicting the flutter boundary with an error of 1.2%. This model will be used to develop active flutter suppression controllers, as well as to perform the sensitivity analyses necessary to investigate their robustness.

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Model updating of finite element model using optimisation routine

Cited by 6 publications

References 6 publications

Aeroelastic scaling of flying demonstrators: mode tracking technique

Aeroelastic scaling of flying demonstrators: mode tracking technique

Atualização De Modelos Numéricos a Partir De Dados Experimentais Para Monitoramento Estrutural: Mapeamento Sistemático

Model Updating and Aeroelastic Correlation of a Scaled Wind Tunnel Model for Active Flutter Suppression Test

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