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Showing 1 to 16 of 16 for “"vortex-induced vibration (VIV)"”.
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Investigations on Vortex-induced Vibration (VIV) Phenomena of Single-and-double-cylinder Flexible Beam Arrangements of Energy Harvesters
… energy-harvesting, which converts mechanical (vibration) into electric energy, is the fastest development one in recent years.</p> <p>In our current work, a piezoelectric harvester with a finite length cylinder fixed to one end of a flexible thin beam, is the research object in an incoming flow …
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Passive wake detection using seal whisker-inspired sensing
… to accomplish this detection. Key are the unique vortex-induced vibration (VIV) properties resulting from the geometry of the harbor seal whisker. First, force measurements and flow visualizations on a rigid whisker model undergoing 1-D imposed oscillations show that the geometry passively reduces …
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Visualization of vibration experienced in offshore platforms
… methods to optimize the visualization of vortex-induced vibration (VIV) in marine risers. VIV is vibration experienced by marine risers in offshore drilling platforms due to ocean current flows, and appears to be perpendicular to the direction of such flows. VIV causes oil companies large …
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Study of reduced order models for vortex-induced vibration and comparison with CFD results
Vortex-induced vibration (VIV) is a dynamic phenomenon that can occur when there is fluid flow past a bluff body with flexibility. Over time, VIV can cause fatigue damage, so it may be desirable to suppress these vibrations. It is important to understand how the system behaves when trying to …
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Effect of traveling waves on Vortex-Induced Vibration of long flexible cylinders
… exposed to ocean currents, are susceptible to Vortex-Induced Vibration (VIV). Accurate prediction of VIV is necessary for estimating the fatigue life as well as for taking corrective measures to prevent the vibrations. State of the art response prediction methods work reasonably well for short …
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Vortex-induced vibration of slender structures in unsteady flow
Vortex-induced vibration (VIV) results in fatigue damage of offshore oil exploration and production structures. In recent years, the offshore industry has begun to employ curved slender structures such as steel catenary risers in deep-water offshore oil systems. The top-end vessel motion causes the …
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Vortex-induced vibration of marine risers : motion and force reconstruction from field and experimental data
Vortex-induced vibration (VIV) of long flexible cylindrical structures enduring ocean currents is ubiquitous in the offshore industry. Though significant effort has gone into understanding this complicated fluid-structure interaction problem, major challenges remain in modeling and predicting the …
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FSI Methodology for Analyzing VIV on Subsea Pipeline Free Spans with Practical Boundary Conditions
… analysis. A general assumption in performing vortex-induced vibration (VIV) analysis of pipeline free spans is that both ends of the free span are fixed and/or pinned in order to simplify computational simulations; however, Det Norske Veritas (DNV – translation to The Norwegian Truth) …
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Simulation of vortex induced vibration of a bluff body structure
Understanding Vortex induced vibration (VIV) phenomenon is essential as it plays important role in designing marine risers which used in oil extraction from the seabed to the offshore platforms were exposed to external flows that may trigger dangerous VIV oscillations. The present two-dimensional …
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Passive wake detection using seal whisker-inspired sensing
… accomplish this detection. Key are the unique ow-induced vibration properties resulting from the geometry of the harbor seal whisker, which is undulatory and elliptical in cross-section. First, the vortex-induced vibration (VIV) characteristics of the whisker geometry are tested. Direct force …
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Energy Harvesting from the Vortex-Induced Vibrations of Bluff Body Oscillators
<p>Vortex-induced vibration (VIV) of bluff bodies provides an effective mechanism for harvesting energy from fluid flows. Yet, the complex fluid-structure interactions governing vibration amplitude, synchronization, and energy transfer in single and coupled oscillators remain only partially …
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Understanding flow-induced vibration via a physics-constrained, data-driven approach
Vortex-induced vibration (VIV) of long flexible cylinders involves a large number of physical variables, such as Strouhal number, Reynolds number, and damping. Due to the nonlinearity and high-dimensionality of the problem, current VIV prediction models have large error bounds, and require …
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Instabilities in membrane structures under extreme conditions
… space. The flutter dynamics of tensile panels induced by wind loading conditions is investigated in the second part of the thesis by means of Fluid-Structure Interaction (FSI) analyses, enhanced by vortex-induced vibration (VIV) simulations. The study elucidates the relationship between tension …
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Vortex-induced vibration of a linearly-sprung cylinder with nonlinear energy sinks
… circular cylinder undergoing rectilinear vortex-induced vibration (VIV) normal to the mean flow. The attachment is a nonlinear energy sink (NES). The essentially nonlinear coupling between the rectilinear motion of the cylinder and the motion of the NES allows for efficient, one-way …
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Experimental and numerical investigations on wind characteristics and wind induced vibrations of bridge structures
… of the proposed prediction method. Wind induced vibration is another aspect which will affect the safety of the structures. As a typical and commonly seen type of wind induced vibration, vortex induced vibration (VIV) of bridges and the aerodynamic influences of the bridge attachments on …
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Modal interactions and targeted energy transfers in laminar vortex-induced vibrations of a rigid cylinder with strongly nonlinear internal attachments
Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Seth Robbins (robbins.sd@gmail.com) on 2014-01-16T18:19:53Z Item is restricted until 2016-01-16T18:19:34Z