Bridge vibration logarithmic decrement estimation at the presence of amplitude beat

Nakutis, Žilvinas; Kaškonas, Paulius

doi:10.1016/j.measurement.2010.11.012

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…Although the band-pass filter is used, the signal, which registers the free vibration, is affected by two very similar frequencies because the phenomenon of beat frequencies occurs in bridge structures while being tested. Such a situation is found on bridge structures, especially for cable bridges [10,25,26]. e proposed solution of this occurrence is superior to the classical method based upon the definition of the logarithmic decrement of damping that, in the submitted example, the estimation of the damping coefficient is not hampered by the errors occurring from the number of frequency components ( Figure 4).…”

Section: Proposition Of the Damage Detection Algorithmmentioning

confidence: 99%

Effective Processing of Radar Data for Bridge Damage Detection

Owerko

Kuraś

2019

Shock and Vibration

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This paper presents the practical results of the evaluation of the data obtained by using ground-based radar interferometer during measurements carried out on bridge structures. Due to the nature of the objects studied, the authors proposed a comprehensive method of data analysis, which identifies whether the passage of the vehicle did not damage the bridge. The effective use of vehicles as a source of bridge excitation allowed us to first develop a method for determining the damping parameters resistant to potentially occurring beating frequencies. As a result, it is possible to determine these subsets of data registered with radar, for which it is possible to assume compliance with linear systems. This type of data, often omitted in other works, forms the basis for the second important element of the research—an algorithm based on the ARMA model supporting defect detection. The optimization of the performed calculations, in particular the proposed optimal ARMA model order, the method of fault identification based on the DSF parameter, or fault identification based on a nonmetrical Cook’s distance leads to a robust and scalable method. The method’s low computational complexity allows for implementation in real-time solutions. In addition, the distribution of errors and the sensitivity of classifiers based on the DSF parameter and Cook’s distances leaving them will enable the automation of the classification process using machine learning. The proposed method is universal; in particular, it can be used for radar interferometry methods because it is resistant to potentially variable environmental conditions.

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Section: Proposition Of the Damage Detection Algorithmmentioning

confidence: 99%

Effective Processing of Radar Data for Bridge Damage Detection

Owerko

Kuraś

2019

Shock and Vibration

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“…In 2004, Chen et al adopted a newly emerged empirical mode decomposition (EMD) technique along with HT (EMD-HT) to calculate the damping of the Tsing Ma suspension bridge located in Hong Kong [82]. On the other hand, a logarithmic decrement was also adopted, as Nakutis and Kaskonas calculated the damping ratio of a two-girder bridge in 2010 using the logarithmic decrement approach [83]. In 2020, Chen et al estimated the damping of long cables with the viscous-shear dampers of the Sutong cable-stayed bridge located in China [84].…”

Section: Benchmarking Information Between Labview and Artemismentioning

confidence: 99%

Development and Validation of a LabVIEW Automated Software System for Displacement and Dynamic Modal Parameters Analysis Purposes

et al. 2023

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The structural health monitoring (SHM) technique is a highly competent operative process dedicated to improving the resilience of an infrastructure by evaluating its system state. SHM is performed to identify any modification in the dynamic properties of an infrastructure by evaluating the acceleration, natural frequencies, and damping ratios. Apart from the vibrational measurements, SHM is employed to assess the displacement. Consequently, sensors are mounted on the investigated framework aiming to collect frequent readings at regularly spaced time intervals during and after being induced. In this study, a LabVIEW program was developed for vibrational monitoring and system evaluation. In a case study reported herein, it calculates the natural frequencies as well as the damping and displacement parameters of a cantilever steel beam after being subjected to excitation at its free end. For that purpose, a Bridge Diagnostic Inc. (BDI) accelerometer and a displacement transducer were parallelly mounted on the free end of the beam. The developed program was capable of detecting the eigenfrequencies, the damping properties, and the displacements from the acceleration data. The evaluated parameters were estimated with the ARTeMIS modal analysis software for comparison purposes. The reported response confirmed that the proposed system strongly conducted the desired performance as it successfully identified the system state and modal parameters.

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“…The beam material was steel St3 Substrate thickness was 2.0 mm, the mass of the polymer coating was about 30% of the substrate weight, the homogeneity coefficient of the material was in the range 0 K =0.84…0.87. The logarithmic decrement of vibrations λ was taken as an investigated parameter [18][19][20][21][22], the amplitude of the relative strain ε was taken as an independent parameter with bending vibrations of the beam at a near-resonance frequency of 32 Hz.…”

Section: Experimental Study Of the Damping Properties Of Compositesmentioning

confidence: 99%

Calculation and Experimental Technique for Determining the Damping Properties of Composite Materials

Koryagin

Sharkov

Великанов

2018

MSF

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Polymer coatings are widely used for effective vibration damping of sheet or hull structures of different engineering systems. The article presents a calculation and experimental technique that enables improved accuracy and validity of damping properties determination of polymer coatings. Mathematical models to determine the parameters of the experimental specimen having a homogenous strain state of the polymer coating are obtained. Experimentally confirmed that the use of coatings based on adhesive compositions such as "Sprut" increases by 18...28 times the damping capability in metal structures. An addition of fillers in adhesive compositions "Sprut" type in a proportion of 30...50% of its weight reduces by 2.4 times the damping properties of metal structures.

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Bridge vibration logarithmic decrement estimation at the presence of amplitude beat

Cited by 12 publications

References 3 publications

Effective Processing of Radar Data for Bridge Damage Detection

Effective Processing of Radar Data for Bridge Damage Detection

Development and Validation of a LabVIEW Automated Software System for Displacement and Dynamic Modal Parameters Analysis Purposes

Calculation and Experimental Technique for Determining the Damping Properties of Composite Materials

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