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Intelligent automatic operational modal analysis
Mechanical Systems and Signal Processing, 2023 Operational modal analysis methods have been proven especially useful to identify existing structures and infrastructures under serviceability conditions. However, the installation of sensing systems for monitoring continuously an ever larger number of existing constructions has motivated significant efforts towards the automation of the available ...
Giuseppe Quaranta +2 more
exaly +4 more sources
Uncertainty quantification of the Modal Assurance Criterion in operational modal analysis [PDF]
Mechanical Systems and Signal Processing, 2021 The Modal Assurance Criterion (MAC) is a modal indicator designed to decide whether the mode shapes used in its computation are corresponding to the same mode. During structural monitoring, it can be applied to evaluate changes in the mode shapes. When the mode shapes are estimated from measurement data, the MAC inherits their statistical properties ...
Gres, Szymon +2 more
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DIC‐Based Operational Modal Analysis of Bridges [PDF]
Advances in Civil Engineering, 2021 A new method has been proposed to identify the natural frequencies and mode shapes of a bridge model, in which the digital image correlation (DIC) technique is used to track the dynamic displacement. A key issue in vibration‐based damage detection for a bridge is to determine its modal parameters. It is difficult to use traditional acceleration sensors
Gongfa Chen +4 more
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In-flight modal identification by operational modal analysis
Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2023 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Elsa M. Cárdenas +3 more
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Modal Appropriation for Use with In-Operation Modal Analysis [PDF]
Shock and Vibration, 2015 We propose in this paper a numerical modal appropriation method for use with in-operation modal analysis (INOPMA). The key idea is to realize that the correlation sequence of the system output is the sum of decaying sinusoids with a certain phase shift and therefore it may be considered as an impulse response.
M. Abdelghani, D. J. Inman
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Uncertainties on modal parameters by operational modal analysis [PDF]
Mechanics & Industry, 2014 Lorsqu’on fait une analyse modale opérationnelle sur des structures en fonctionnement, sans connaître les forces de perturbation, ni le nombre de fréquences importantes qui excitent le système mécanique, on doit se poser la question sur la validité de l’estimation des paramètres modaux (notamment le taux d’amortissement) et sur la précision des ...
Vu, Viet-Hung, Thomas, Marc
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An application of operational modal analysis in modal filtering
Journal of Physics: Conference Series, 2011 Modal filtration in the field of damage detection has many advantages, including: its autonomous operation (without the interaction of qualified staff), low computational cost and low sensitivity to changes in external conditions. However, the main drawback of this group of damage detection methods is its limited applicability to operational data.
Piotr Kurowski +2 more
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Mass and Temperature Changes in Operational Modal Analysis
, 2021 A challenge in identifying the dynamic properties of large structures through operational modal analysis (OMA), whereby the response of a structure is measured under ambient excitation, is the changes in added mass and temperature which may occur during data collection.
Zachariah Wynne +5 more
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Modal Analysis Using Operating Modal Identification Method
Chinese Journal of Aeronautics, 2004 AbstractSometimes it is very difficult for some large scale operating structures to measure the input forces. Modal parameters must be estimated on response only. A poly-reference time domain operating modal identification complex exponential method is presented since cross-correlation functions have the same form as impulse response functions.
ZHENG, Min +3 more
openaire +4 more sources
Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source