Operational Modal Analysis
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Modal Parameter Extraction of a Huge Four Stage Centrifugal Compressor Using Operational Modal Analysis Method
Abstract In recent years, modal analysis has become one of the essential methods for modification and optimization of dynamic characteristics of engineering structures. This is the first published study to identify modal parameters of a complex four-stage centrifugal compressor using Operational Modal Analysis (OMA). Vibrational response was measured contin
Lat. Am. j. solids struct.. Publicado em: 03/05/2018
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2. Updating Finite Element Model Using Stochastic Subspace Identification Method and Bees Optimization Algorithm
Abstract This study investigates the application of operational modal analysis along with bees optimization algorithm for updating the finite element model of structures. Bees algorithm applies instinctive behavior of honeybees as they look for nectar of flowers. The parameters that needed to be updated are uncertain parameters such as geometry and material
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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3. Comparison of In-Flight Measured and Computed Aeroelastic Damping: Modal Identification Procedures and Modeling Approaches
ABSTRACT The Operational Modal Analysis technique is a methodology very often applied for the identification of dynamic systems when the input signal is unknown. The applied methodology is based on a technique to estimate the Frequency Response Functions and extract the modal parameters using only the structural dynamic response data, without assuming the kn
J. Aerosp. Technol. Manag.. Publicado em: 2016-06
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4. The Geographical Information System (GIS) as a strategy in logistics decisions of physical distribution / O Sistema de Informação Geográfica (GIS) como estratégia nas decisões logísticas de distribuição física
The concept of logistics, which until the mid-50 was limited to physical distribution - transport docks and warehouses due to its beginnings in the great empires and armies, has become much more complex and comprehensive. Nowadays it integrates processes involving the entire geographic scope, encompassing material flows, information and products from the poi
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/04/2011
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5. Proposta de uma metodologia baseada em análise modal operacional para monitoramento de fim de vida de ferramentas de corte / A Methodology Based on Operational Modal Analysis for Tool Life Monitoring
Apesar de ter eficiência comprovada, o monitoramento indireto de processos de usinagem pela medição dos níveis de vibrações é muito dependente das condições de operação da máquina e dos níveis de vibração não correlacionados diretamente com o processo de usinagem, tais como vibrações de mancais por exemplo. Uma metodologia alternativa é a
Publicado em: 2009
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6. Output-only structural identification of random vibrating systems
A new form to carry out stochastic identification of structures in operational conditions using a non recursive method, the statistic analysis and the wavelet transform, is presented. The statistic analysis contributed to select the best system order and to automation of computational procedures. In general the identification of low frequencies is a difficul
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2006-03
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7. Study of techniques of operational modal analysis in the presence of random excitations and harmonic component / Estudo de técnicas de análise modal operacional em sistemas sujeitos a excitações aleatórias com a presença de componente harmônico
A metodologia tradicional de identificação de parâmetros na análise modal de estruturas é realizada a partir de sinais medidos de força de entrada e de movimento de resposta da estrutura em condições laboratoriais controladas. Entretanto, quando é necessária a obtenção dos parâmetros modais de estruturas de máquinas em operação, as condiçõe
Publicado em: 2006