Experimental characterization of multiple cracks in a cantilever beam utilizing transient vibration data following a probabilistic approach
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TLDR
In this article, a method for detecting multiple cracks on beams by utilizing transient vibration data is proposed, which consists of two stages, in the first stage the number of cracks is identified by a computationally efficient algorithm that utilizes the Bayesian model class selection method, and in the second stage, the posterior probability density function (PDF) of crack characteristics (i.e., the crack locations and crack depths) are determined by the bayesian model updating method.About:
This article is published in Journal of Sound and Vibration.The article was published on 2007-08-07 and is currently open access. It has received 45 citations till now. The article focuses on the topics: Laser Doppler vibrometer & Beam (structure).read more
Citations
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Bayesian uncertainty analysis with applications to turbulence modeling
TL;DR: Bayesian uncertainty quantification techniques are applied to the analysis of the Spalart–Allmaras turbulence model in the context of incompressible, boundary layer flows and it is shown that by using both the model plausibility and predicted QoI, one has the opportunity to reject some model classes after calibration, before subjecting the remaining classes to additional validation challenges.
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A Lamb-wave-based technique for damage detection in composite laminates
TL;DR: In this article, a network of transducers that are used to sequentially scan the structure before and after the presence of damage by transmitting and receiving Lamb wave pulses is proposed, and a damage localization image is reconstructed by analyzing the cross-correlation of the scatter signal envelope with the excitation pulse envelope for each transducer pair.
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Experimental damage detection of cracked beams by using nonlinear characteristics of forced response
Ugo Andreaus,Paolo Baragatti +1 more
TL;DR: In this article, the authors evaluated the nonlinear aspects of the flexural forced vibrations of a steel cantilever beam having a transverse surface crack extending uniformly along the width of the beam, where an actual fatigue crack was introduced instead of a narrow slot.
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Scattering of the fundamental anti-symmetric Lamb wave at delaminations in composite laminates.
Ching-Tai Ng,Martin Veidt +1 more
TL;DR: The results suggest that care is required to use bonded masses to simulate delamination damage for verifying and optimizing damage characterization techniques, and help to further advance the use of the A(0) Lamb wave for damage detection and characterization.
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Bridge health monitoring system based on vibration measurements
Evangelos Ntotsios,Costas Papadimitriou,Panagiotis Panetsos,Grigorios Karaiskos,Kyriakos Perros,Philippos P P Perdikaris +5 more
TL;DR: In this article, a bridge health monitoring system is presented based on vibration measurements collected from a network of acceleration sensors, combining information from the sensor network with the theoretical information built into a finite element model for simulating bridge behavior, are incorporated into the system in order to monitor structural condition, track structural changes and identify the location, type and extent of damage.
References
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Dynamics of structures
Ray W. Clough,Joseph Penzien +1 more
TL;DR: In this article, a single-degree-of-freedom (SDF) dynamic system is considered, and the effect of different degrees of freedom on the dynamics of the system is investigated.
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Updating Models and Their Uncertainties. I: Bayesian Statistical Framework
TL;DR: The problem of updating a structural model and its associated uncertainties by utilizing dynamic response data is addressed using a Bayesian statistical framework that can handle the inherent ill-conditioning and possible nonuniqueness in model updating applications.
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Identification of crack location and magnitude in a cantilever beam from the vibration modes
TL;DR: In this article, the authors proposed a non-destructive testing method for crack identification, which requires amplitude measurements at two positions of the structure only and is applicable to all one-dimensional structures.
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Model Selection using Response Measurements: Bayesian Probabilistic Approach
James L. Beck,Ka-Veng Yuen +1 more
TL;DR: In this paper, a Bayesian probabilistic approach is presented for selecting the most plausible class of models for a structural or mechanical system within some specified set of model classes, based on system response data.
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Analysis of the effect of cracks on the natural frequencies of a cantilever beam
TL;DR: In this article, a method of analysis of the effect of two open cracks on the frequencies of the natural flexural vibrations in a cantilever beam is presented, and two types of cracks are considered: double-sided and single-sided.