Global ETD Search
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Showing 1 to 10 of 10 for “"Modal Assurance Criterion."”.
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Comparative Evaluation of Vorticity Transport Modeled Distortions and High-Fidelity ANSYS Solutions Using Modal Assurance Criterion
… Bulk Swirl, Twin Swirl, and Quad Swirl. Modal decomposition through singular value decomposition (SVD) is performed on the resulting in-plane velocity profiles for both the ROM and high-fidelity RANS simulations. The accuracy of the ROM is assessed through both conventional error analyses …
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Experimental Damage Diagnosis of a Model Three-Story Spatial Frame
… metal frame building was constructed. Using Star Modal software, dynamic structural properties were obtained from modal decomposition on experimental tap test responses. The natural frequencies and mode shapes of the structure established an as-built baseline for comparison to ten other scenarios …
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An attempt to quantify errors in the experimental modal analysis process
Experimental modal analysis (EMA) techniques have become a popular method of studying the dynamic characteristics of structures. A survey of literature available reveals that experimental modal models resulting from EMA may suffer from inaccuracy due to a host of reasons. Every stage of EMA could …
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Laser-based broad-band spatially dense automated data acquisition system
… extracted. The mode shapes were compared by the Modal Assurance Criterion to show the orthogonality of the modes and a comparison with theory. In each of the cases above, the comparisons yielded results that indicated the modes were both orthogonal and close to theory. The overall conclusion …
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Modal testing using high speed digital speckle pattern interferometry
… (SPI) to perform quantified impact modal testing. The interferometer acts as a non-contact multipoint vibrometer that removes the mass-loading effects of contact transducers to improve measurement accuracy and decreases measurement time by the use of multiple measurement points. A …
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Dynamic Testing and Modeling of a Superelevated Skewed Highway Bridge
… refinement, and changing boundary conditions on modal parameters were thoroughly investigated. FE models were compared to the experimental results by directly comparing frequencies and using the modal assurance criterion to compare mode shapes. Support conditions of the actual structure were …
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Damage detection in reinforced concrete square slabs using modal analysis and artifical neural network
… based damage detection methods, particularly modal based methods, are found to be promising in evaluating the health condition of a structure in terms of detection, localisation, classification and quantification of the potential damage in the structure. Damage in composites and the …
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Effects of structural repair and strengthening on stiffness and ultimate capacity of corrosion-damaged RC beams
… and dynamic properties (natural frequencies and modal shapes). The effect of patch repair and strengthening on corrosion damaged beams was deduced from the changes in their ultimate capacities. From the deflection measurements measured during the corrosion process, stiffness decreased with the …
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Vibration Serviceability Assessment of a Steel Modular Floor System
A new modular steel floor system, named FastFloor, is proposed for commercial buildings. The system is conceptualized to be prefabricated at the shop and ready to be installed on a previously erected skeleton frame structure consisting of girders and columns or connected to core shear walls. The …
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Algorithmic Optimization of Sensor Placement on Civil Structures for Fault Detection and Isolation
<p>Damage detection and isolation (DDI) is a task that can be divided into two major portions. Damage detection constitutes the first part of the problem, where the goal is to determine when a structural anomaly has occurred. Once an anomaly has been detected, algorithms must be employed to …