An analysis of footbridge vibration parameters

Skeivalas, Jonas; Jurevičius, Mindaugas; Kilikevičius, Artūras; Turla, Vytautas

doi:10.1016/j.measurement.2015.02.034

Cited by 11 publications

(12 citation statements)

References 3 publications

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“…1, 000 À 2, 500. 2,8,9 More significant graphical expressions of normative auto-covariance and inter-normative covariance functions are presented in Figures 6-11. Figure 12 presents a graphical image of the five vectors' array's generalized (spatial) correlation matrix for centering device.…”

Section: Experiment Analysis Results and Discussionmentioning

confidence: 99%

“…For the analysis of vibration signal parameters, the model of covariance functions is used, created by authors and described in literature. 2,8,9 A block diagram of research stand for the identification of the dynamic mechanical characteristics of the system is presented in Figure 3.…”

Section: Test Objectmentioning

confidence: 99%

“…5 Other topics are related to data reconciliation, such as sampling error and reconciliation criterion weighting factor evaluation, 6 reconciled value accuracy evaluation, 7 and use of reconciled values to calculate and display plant performance indices, such as concentrate grade and recovery. 2,8,9 Poulin et al 10 studied steady-state data reconciliation applied on a real-time basis. Vasebi et al 11 proposed a modified stationary observer that takes advantage of the correlation of node imbalances to improve estimation performances.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental analysis of dynamic parameters of the leveling and centering device

Kilikevičius

Skeivalas

Jurevičius

et al. 2019

Measurement and Control

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The article analyzes vibrational oscillation's strength dissemination and the parameters in the centering and leveling table using the covariance function theory. The implementation of measurement techniques requires to use most advanced ideas, and to seek and develop new tools, based on which the direction of angle calibration system's development could be substantiated and calibration methodologies could be enabled. Vibrational oscillation strength measurements across fixed five ring points' observations were recorded on a time scale in five vectors arrays (matrices). The covariance functions have enabled the evaluation of the influence of the vibrations of the corresponding rings on the accuracy of the measurement results. Expressions of auto-covariance and cross-covariance functions show the changes in the time scale of the interdependence between the parameters of the corresponding vibrations of the rings on the smoothing device. These changes significantly affect the measurement data errors. The digital vibrational strength measurement arrays' reciprocal covariance functions were calculated, and estimates of individual arrays' auto-covariance functions, by changing the quantization interval on the time scale. The covariance model proposed by the authors for the analysis of the dynamical parameters of the centering-leveling devices can be used to investigate the dynamic characteristics of the angular comparators containing the said devices and at the same time to determine the ways of improving the precision of these angular comparators. The calculations were carried out using the special computer program developed by the authors of the Matlab7 Operator Package (The MathWorks, Inc. R2012a 7.14.0.739 License Number 699298).

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Section: Experiment Analysis Results and Discussionmentioning

confidence: 99%

Section: Test Objectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Theoretical and experimental analysis of dynamic parameters of the leveling and centering device

Kilikevičius

Skeivalas

Jurevičius

et al. 2019

Measurement and Control

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“…Bridge testing is a reliable way to assess the technical condition of the bridge (Bačinskas, Turla, Kilikevičius, Ragauskas, & Jurevičius, 2014;Skeivalas, Jurevičius, Kilikevičius, & Turla, 2015) because the test results show the actual behaviour of the building under static or dynamic loading. The tests evaluate the factors that neither the design nor the construction process of the bridge can take in to account.…”

Section: Modern Discourse Of the Problemmentioning

confidence: 99%

Field Testing and Dynamic Analysis of Old Continuous Truss Steel Bridge

Kilikevičius

Bačinskas

Jurevičius

et al. 2018

The Baltic Journal of Road and Bridge Engineering

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Abstract. Paper presents dynamic field test and analysis results of a three span railway steel continuous truss bridge over river Neris in Jonava. Bridge was originally constructed in 1914. In the period of the World War II and afterwards the bridge was many time destroyed by German and Soviet armies. In 1948 the new railway bridge was constructed. Object of the present paper is to evaluate dynamic behaviour of the railway bridge after 67 years in service. Experimental dynamic analysis was divided into resonance-vibration, forced-vibration and free vibration studies. Resonance-vibrations of the bridge were excited by separate actions of shock loading and standard locomotive 2M62. Forced-vibrations were measured under the action of locomotive 2M62. Additionally, free vibration tests under passage of freight and passenger trains have been carried out. Structural dynamic response of the bridge was analysed using Brüel & Kjaer LAN XI dynamic test system and software. As a result, main dynamic parameters of the bridge were obtained. The main results include: mode shapes, frequencies of natural and forced vibrations, damping ratios, maximum amplitudes of accelerations, dynamic displacements. The obtained values were compared to the requirements of different design codes. Based on the achieved results concluding remarks and recommendations regarding the condition of the bridge after long-term period in service were presented.

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“…The theory of covariance functions was used in the analysis of vibration parameters. Graphical expressions of covariance functions illustrate the change of inter-dependence of vibration parameters over a given time scale [2]. The degree of the change of spatial dependences depends on technological and dynamic properties of the object being examined and the stability of the structure of the bridge trusses [3].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Dynamic Parameters of a Railway Bridge

et al. 2019

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This article analyses the dispersion of vibration accelerations of a railway bridge during the passage of a train, and presents an analysis of their parameters after the application of the theory of covariance functions. The measurements of vibration accelerations at the fixed points of the beams of the overlay of the bridge were recorded in the time scale as digital arrays (matrices). The values of inter-covariance functions of the arrays of data of measurements of digital vibration accelerations and the values of auto-covariance functions of the individual arrays, changing the quantization interval in the time scale, were calculated. The compiled software Matlab 7 in the operator package environment was used in calculations. This article aims at determining the interdependencies of results of vibrations of bridge points rather than at the impact which a train makes on a bridge without emphasizing the modal parameters of the bridge. The aforementioned interdependencies make it possible to predict the results of hard-to-reach points.

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An analysis of footbridge vibration parameters

Cited by 11 publications

References 3 publications

Theoretical and experimental analysis of dynamic parameters of the leveling and centering device

Theoretical and experimental analysis of dynamic parameters of the leveling and centering device

Field Testing and Dynamic Analysis of Old Continuous Truss Steel Bridge

Analysis of Dynamic Parameters of a Railway Bridge

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