Comparison of experimental and operational modal analysis on a laboratory test plate

Orlowitz, Esben; Brandt, Anders

doi:10.1016/j.measurement.2017.02.001

Cited by 52 publications

(39 citation statements)

References 9 publications

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“…300 seconds responses were used, which corresponds to approximately 42500 periods of the lowest natural frequency. For more details on the data, the reader is referred to [13]. The correlation functions were produced using an unbiased estimator and a block-size of 512 samples.…”

Section: Methodsmentioning

confidence: 99%

“…most civil-engineering structures, the presence of external forces is inevitable, hence OMA is employed. A thorough comparison of EMA and OMA for measurements on a Plexiglass plate show that they perform equally, see [13].…”

Section: Introductionmentioning

confidence: 99%

“…The pencil used for excitation is shown in the lower right corner (b) Measurement grid of the Plexiglas plate, having 35 measurement points, each with a separation of 78x85mm, and a full dimension of 533x321x20mm (length x width x depth) Experimental setup and measurement grid of the Plexiglas plate. Figures are taken from[13]…”

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confidence: 99%

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Parameter Study of Statistics of Modal Parameter Estimates Using Automated Operational Modal Analysis

Christensen

Brandt

2019

Conference Proceedings of the Society for Experimental Mechanics Series

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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. In this paper, a comprehensive study on the influence of these parameters is conducted using the multi-reference Ibrahim Time Domain algorithm (similar to the cov-SSI method). Data from a laboratory Plexiglas plate are investigated, and an automated Operational Modal Analysis (OMA) algorithm is used to systematically select physical poles. The effect of each of the various control parameters are discussed in the paper.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Parameter Study of Statistics of Modal Parameter Estimates Using Automated Operational Modal Analysis

Christensen

Brandt

2019

Conference Proceedings of the Society for Experimental Mechanics Series

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“…Provided that identical boundary conditions are considered for a given structure, mostly coincident frequency and damping estimations are expected from EMA and OMA tests [31]. In this regard, experimental comparisons are proposed in [32] for plexiglass panels, aiming at reproducing the dynamic performance of a glass façade prototype.…”

Section: Experimental (Ema) and Operational (Oma) Modal Analysis Techmentioning

confidence: 99%

“…Later, Pelayo and Lopez-Aenlle [25] proposed a dynamic effective thickness formulation, for the reliable estimation of natural frequencies and damping ratios of multi-layered LG beams. To assess the viscous effect of PVB interlayers, OMA investigations were discussed for beam-like specimens with ideally rigid restraints, under different operational temperatures (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35) • C the explored range). In [26], Zemanova et al carried out a wide set of parametric analytical calculations, aimed at assessing the frequency and loss factor estimations that can be derived from the modal analysis of beam-like LG elements with ideal supports, by considering several interlayer types (PVB, SentryGlas®(SG), or Ethyl Vinyl Acetate (EVA)).…”

Section: Introduction and State-of-the-artmentioning

confidence: 99%

Vibration Analysis and Dynamic Characterization of Structural Glass Elements with Different Restraints Based on Operational Modal Analysis

2019

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Given a series of intrinsic features of structural glass systems (i.e., material properties, type of restraints, operational conditions, etc.), special care should be spent at the design stage, to ensure appropriate fail-safe requirements, but also in the service life of these innovative building components and assemblies. In this paper, the dynamic characterization of simple monolithic glass elements is presented, based on non-destructive laboratory experiments and Operational Modal Analysis (OMA) techniques, including Finite Element (FE) numerical simulations, classical analytical models, and video-tracking approaches. It is shown, in particular, how the actual restraint condition (i.e., flexibility of supports, with respect to ideal boundaries) can affect the vibration parameters of a given glass member (frequency and damping capacity). This turns out in possible variations of its overall structural performance, including stress-strain-related effects, hence suggesting the need for even further dedicated studies and methods for the reliable analysis and design of structural glass assemblies and complex systems under dynamic loads.

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2023

Noise and Vibration Analysis

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Comparison of experimental and operational modal analysis on a laboratory test plate

Cited by 52 publications

References 9 publications

Parameter Study of Statistics of Modal Parameter Estimates Using Automated Operational Modal Analysis

Parameter Study of Statistics of Modal Parameter Estimates Using Automated Operational Modal Analysis

Vibration Analysis and Dynamic Characterization of Structural Glass Elements with Different Restraints Based on Operational Modal Analysis

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