Results 11 to 20 of about 86,065 (315)

Modal Parameter Tracking in a Carbon Fiber-Reinforced Structure over Different Carbon Fiber Angles

open access: yesJournal of Marine Science and Engineering, 2021
The dynamics of carbon fiber-reinforced plastic (CFRP) change according to the carbon fiber angle, and a mode order shift may occur in CFRP specimens. The variation trends in modal parameters differ in each mode; thus, an efficient mode-tracking method ...
Chan-Jung Kim
doaj   +1 more source

Operational Modal Analysis of an Axial Compressor Rotor and Casing System for the Online Identification of a Digital Twin

open access: yesApplied Mechanics, 2022
Modal parameter identification can be a valuable tool in mechanical engineering to predict vibrational behaviour and avoid machine damage during operation.
Mona Amer   +2 more
doaj   +1 more source

Modal control based on direct modal parameters estimation [PDF]

open access: yesJournal of Vibration and Control, 2017
Modal active control is based on a state model that requires the identification of modal parameters. This identification can typically be done through a rational fraction polynomial algorithm applied in the frequency domain. This method generates numerical problems when estimating high-order models, particularly when moving from the basis of orthogonal
Chomette, Baptiste, Mamou-Mani, Adrien
openaire   +2 more sources

Optimization Strategy for Modal Test Measurement Points of Large-Span Steel Beams Based on Improved Particle Swarm Optimization Algorithm with Random Weights

open access: yesApplied Sciences, 2022
In order to obtain better vibration response data and improve the accuracy of results in large-span steel beam modal tests, this paper proposes an optimization strategy for the arrangement of measurement points on large-span steel beams.
Jian Zhao   +4 more
doaj   +1 more source

Parameter Study of Statistics of Modal Parameter Estimates Using Automated Operational Modal Analysis [PDF]

open access: yes, 2019
For any modal parameter estimation (MPE) method, there are a few control inputs that can have an impact on the modal parameter estimates. These control inputs are typically involving parameters like the maximum model order and how many time values or frequency lines that should be included in the MPE.
Christensen, Silas S., Brandt, Anders
openaire   +2 more sources

A New Maximum Likelihood Estimator Formulated in Pole-Residue Modal Model

open access: yesApplied Sciences, 2019
Recently, a lot of efforts have been devoted to developing more precise Modal Parameter Estimation (MPE) techniques. This is explained by the necessity in civil, mechanical and aerospace engineering of obtaining accurate estimates for the modal ...
Sandro Amador   +3 more
doaj   +1 more source

Damage localization using experimental modal parameters and topology optimization [PDF]

open access: yes, 2010
This work focuses on the developement of a damage detection and localization tool using the Topology Optimization feature of MSC.Nastran. This approach is based on the correlation of a local stiness loss and the change in modal parameters due to damages ...
Niemann, Hanno   +3 more
core   +1 more source

Significance of low energy impact damage on modal parameters of composite beams by design of experiments [PDF]

open access: yes, 2009
This paper presents an experimental study on the effects of multi-site damage on the vibration response of composite beams damaged by low energy impacts around the barely visible impact damage limit (BVID).
A Shahdin   +6 more
core   +1 more source

Numerical Assessment of Building Vibration Techniques Using Laboratory Models [PDF]

open access: yesPort Said Engineering Research Journal, 2022
Experimental Modal Analysis (EMA) is one of the most attractive engineering fields nowadays, which specifies in the studies of modal parameters of existing small buildings under forced vibrations.
moataz Elrayes   +2 more
doaj   +1 more source

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