Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"Modal analysis techniques"”.
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Modal Analysis Techniques in Wide-Area Frequency Monitoring Systems
… disturbances based on power system post-event modal properties. In this work, power system dynamics are examined from an internal system energy viewpoint. Since an electric power system is composed of coupled rotating machines (large generators) which have air gap magnetic fields that are …
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Fluid-structural interaction effects on vibrations of pipework.
… of structural pipework and investigates the modal responses. The emphasis of this study has been focused on assessing the effects that a fluid has upon the vibratory characteristics of the system concerned. The work elicits both theoretical and experimental investigations into the previously …
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Avaliação da estabilidade a pequenos sinais em sistemas CA/CC em paralelo
… System. In this dissertation, we present an analysis of DC transmission systems in parallel with AC systems from the perspective of small-signal stability of electric power systems. We present aspects related to linear and nonlinear representation of the DC link controls. The studies are …
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Experimental and Analytical Study of Vibrations in Long Span Deck Floor Systems
… fixed-end beam. Dynamic tests using experimental modal analysis techniques were conducted to determine the natural frequencies and mode shapes of the structure. The measured fundamental natural frequency of the footbridge was compared to the frequencies calculated for a simply supported beam and a …
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Investigations on Void Formation in Composite Molding Processes and Structural Damping in Fiber-Reinforced Composites with Nanoscale Reinforcements
… are often fabricated using liquid molding techniques, such as injection molding or resin transfer molding. One significant issue during these processing methods is void formation due to incomplete wet-out of the resin within the fiber preform, resulting in discontinuous material properties …
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Dynamic behaviour of curved cable-stayed bridges
… We discuss the different structure shapes and analysis the dynamic ability. These require in-depth analysis concerning unlikely predictable behavior often necessary FE model's simplification. Thus arose the necessity for structural engineers to develop solid experimental tools able to identify …
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Finite Element Modeling for Prediction of Low Frequency Floor Vibrations Due to Walking
… apply to atypical floor framing. Finite element analysis is a logical choice for predicting vibration response to walking, but simplified designer-friendly procedures are not available. Three relatively simple, experimentally verified methods of predicting low frequency floor vibration due to …