Dynamic Analysis of a Beam with Additional Auxiliary Mass Spatial Via Spectral Element Method

Palechor, Erwin Ulises Lopez; Machado, Marcela; Morais, Marcus Vinícius Girão de; Bezerra, Luciano Mendes

doi:10.1007/978-3-319-96601-4_25

Cited by 3 publications

(4 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Frequency-shift curve is the modal frequency of damage beam (with mass discontinuity for this analysis) as function of a roving mass along essayed beam and Zhong Oyadiji and Ding (2008) shows the possibility to determine damage location in beam-like structures by discontinuity in curvature of frequency-shift for first frequencies. Palechor et al (2014;2018; use Discrete Wavelet Transform (DWT) to evidence discontinuity in frequency-shift curves with good results.…”

Section: Roving Masses Techniquementioning

confidence: 99%

Application of Roving Mass Technique Associated with Wavelet Transform to Structural Damage Detection and Localization

Palechor¹,

Santos²,

Silva³

et al. 2022

Fundamental Concepts and Models for the Direct Problem

View full text Add to dashboard Cite

show abstract

Section: Roving Masses Techniquementioning

confidence: 99%

Application of Roving Mass Technique Associated with Wavelet Transform to Structural Damage Detection and Localization

Palechor¹,

Santos²,

Silva³

et al. 2022

Fundamental Concepts and Models for the Direct Problem

View full text Add to dashboard Cite

show abstract

“…This work presents the application of an identification methodology based on the analysis of the dynamic properties of simply supported steel beams. Beams here are submitted to the action of additional masses that can generate progressive changes of the natural frequencies [14,15]. The change in the structural stiffness due to the existence of damage in the beam may not be so evident.…”

Section: Use Of Additional Massesmentioning

confidence: 99%

“…Due to space reasons, it is impossible to present all the results attained. However, the best results were obtained with the following parameters: (a) Fs=1653 Hz, (b) t=9.9 s, (c) ∆t =0.000605 s, and (d) N=16384 (2 14 ). S Figure 14: LabView control panel.…”

Section: Characteristics and Calibration Of Parametersmentioning

confidence: 99%

Damage identification in beams using additional rove mass and wavelet transform

Palechor

Bezerra

Morais

et al. 2019

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

There is a need for efficient techniques that could identify damages in structures such as in bridges, pipelines, buildings, dams, among others. In order to carry out continuous monitoring of structures, this paper proposes a new experimental methodology for the identification of damages in steel beams. The methodology is based on the variation of the fundamental frequencies caused by the application of an extra additional mass along the length of the structure. This paper proposes the association of additional masses with wavelet transform in the processing of non-stationary signals and the realization of experimental tests on commercial profiles of steel beams under support conditions close to real situations. The experimental tests of simply supported steel beams are presented and discussed in this paper. The results show that the proposed methodology can identify damages or at least give a good indication of the region where damages might be.

show abstract

“…Palechor et al [44] applied this technique using impact force excitation in supported beams and identified frequency perturbation by wavelet transform. Palechor et al [45] developed a new spectral-element with additional mass and compared the spectral method, and Galerkin assumed-mode with experimental results of an I-shape simply supported beam, presented good experimental agreement with low computational cost. Mahmoud and Abou Zaid [46] have investigated mode shapes of structures, supported and cantilever beams, subjected to a moving mass of a fixed or different velocity.…”

Section: Introductionmentioning

confidence: 99%

Beam-like damage detection methodology using wavelet damage ratio and additional roving mass

Santos

Morais

Machado

et al. 2022

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

Early damage detection plays an essential role in the safe and satisfactory maintenance of structures. This work investigates techniques use only damaged structure responses. A Timoshenko beam was modeled in finite element method, and an additional mass was applied along their length. Thus, a frequency-shift curve is observed, and different damage identification techniques were used, such as the discrete wavelet transform and the derivatives of the frequency-shift curve. A new index called wavelet damage ratio(WDR) is defined as a metric to measure the damage levels. Damages were simulated like a mass discontinuity and a rotational spring (stiffness damage). Both models were compared to experimental tests since the mass added to the structure is a non-destructive tool. It was evaluated different damage levels and positions. Numerical results showed that all proposed techniques are efficient techniques for damage identification in Timoshenko's beams concerning low computational cost and practical application.

show abstract

Dynamic Analysis of a Beam with Additional Auxiliary Mass Spatial Via Spectral Element Method

Cited by 3 publications

References 10 publications

Application of Roving Mass Technique Associated with Wavelet Transform to Structural Damage Detection and Localization

Application of Roving Mass Technique Associated with Wavelet Transform to Structural Damage Detection and Localization

Damage identification in beams using additional rove mass and wavelet transform

Beam-like damage detection methodology using wavelet damage ratio and additional roving mass

Contact Info

Product

Resources

About