An Experimental Investigation of Pressure of a Simple Dam Break Generated Wave Impacting a Plate PDF Download
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Author: Anne M. LaBine
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Book Description
It is desirable to measure pressure of a wave striking a vertical surface because this information can be used to determine the strength needed in the building materials of marine structures that may be struck by tall waves. These waves may be caused by storms, tsunamis, or dam breaks and can cause serious damage. This thesis presents two experiments aimed at measuring the pressure exerted by a wave. In both experiments, a series of water waves are released from a reservoir. One wave is released at a time and the waves vary in the initial height of water in the reservoir. In the first experiment, pressure is calculated using a force sensor to determine the force on a paddle and a high-speed camera to determine the contact area. It was found that wave pressure increases as the initial height increases. The pressures ranged from 5+/-2kPa at 25+/-1cm initial water height and 12+/-2kPa at 45+/-1cm initial water height. In the second experiment, pressure is measured at multiple vertical and horizontal locations on a vertical cantilevered plate. A sensor located in the middle of the plate horizontally and 1.25in from the bottom recorded the highest maximum pressure for all trials. The pressures from this sensor for this experiment ranged from 1.6+/-0.1kPa at 20+/-1cm initial water height and 7.4+/-.4kPa at 45+/-1cm initial water height.
Author: Anne M. LaBine
Publisher:
ISBN:
Category :
Languages : en
Pages : 51
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Book Description
It is desirable to measure pressure of a wave striking a vertical surface because this information can be used to determine the strength needed in the building materials of marine structures that may be struck by tall waves. These waves may be caused by storms, tsunamis, or dam breaks and can cause serious damage. This thesis presents two experiments aimed at measuring the pressure exerted by a wave. In both experiments, a series of water waves are released from a reservoir. One wave is released at a time and the waves vary in the initial height of water in the reservoir. In the first experiment, pressure is calculated using a force sensor to determine the force on a paddle and a high-speed camera to determine the contact area. It was found that wave pressure increases as the initial height increases. The pressures ranged from 5+/-2kPa at 25+/-1cm initial water height and 12+/-2kPa at 45+/-1cm initial water height. In the second experiment, pressure is measured at multiple vertical and horizontal locations on a vertical cantilevered plate. A sensor located in the middle of the plate horizontally and 1.25in from the bottom recorded the highest maximum pressure for all trials. The pressures from this sensor for this experiment ranged from 1.6+/-0.1kPa at 20+/-1cm initial water height and 7.4+/-.4kPa at 45+/-1cm initial water height.
Author: Aliza Opila Abraham
Publisher:
ISBN:
Category :
Languages : en
Pages : 102
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Book Description
This thesis describes the use of a combination of various visual techniques to characterize the flow-structure interaction of a breaking wave impacting a flexible vertically mounted plate. Several experiments were conducted on a simulated dam break in which water was rapidly released from a reservoir to generate a wave, which impinged on a cantilevered stainless steel plate downstream. Two high speed cameras collected data on the water and the plate simultaneously. Manual tracking of the wave front and Particle Image Velocimetry (PIV) were used to gather water height, wave speed, crest speed, vorticity, and particle speed, which were used to determine the pressure exerted by the water on the plate. An algorithm was written to track the edge of the plate to find plate deflection over time. The dynamic beam bending equation was used to find the forces experienced by the plate, which were compared to the pressure results. A series of waves of different heights and breaking locations were tested, controlled by the ratio of the height of water initially in the tank and the height of water in the dam break reservoir, for two different plate locations. The properties of the wave varied depending on these parameters, as did the deflection of the plate. The plate deformed more and the recorded velocities in the wave were higher when the depth ratio decreased and when the plate was moved farther from the reservoir. These results shed light on the effect of breaking wave impacts on offshore structures and ship hulls, taking into account the elasticity of these structures. They also provide a test case for future numerical fluid-structure interaction simulation techniques.
Author: Andrew Willard Urquhart
Publisher:
ISBN:
Category : Electric spark
Languages : en
Pages : 112
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Book Description
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 400
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Book Description
Author: Thomas R. Rentz
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages :
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Book Description
Author: Odd M. Faltinsen
Publisher: Cambridge University Press
ISBN: 1139447939
Category : Technology & Engineering
Languages : en
Pages : 490
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Book Description
Hydrodynamics of High-Speed Marine Vehicles, first published in 2006, discusses the three main categories of high-speed marine vehicles - vessels supported by submerged hulls, air cushions or foils. The wave environment, resistance, propulsion, seakeeping, sea loads and manoeuvring are extensively covered based on rational and simplified methods. Links to automatic control and structural mechanics are emphasized. A detailed description of waterjet propulsion is given and the effect of water depth on wash, resistance, sinkage and trim is discussed. Chapter topics include resistance and wash; slamming; air cushion-supported vessels, including a detailed discussion of wave-excited resonant oscillations in air cushion; and hydrofoil vessels. The book contains numerous illustrations, examples and exercises.
Author: Robert B. Jansen
Publisher:
ISBN:
Category : Dam failures
Languages : en
Pages : 348
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Book Description
Author: Odd M. Faltinsen
Publisher: Cambridge University Press
ISBN: 9781107646735
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
This book presents sloshing with marine and land-based applications, with a focus on ship tanks. It also includes the nonlinear multimodal method developed by the authors and an introduction to computational fluid dynamics. Emphasis is also placed on rational and simplified methods, including several experimental results. Topics of special interest include antirolling tanks, linear sloshing, viscous wave loads, damping, and slamming. The book contains numerous illustrations, examples, and exercises.
Author: James Johnston Stoker
Publisher: Courier Dover Publications
ISBN: 0486839923
Category : Science
Languages : en
Pages : 593
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Book Description
First published in 1957, this is a classic monograph in the area of applied mathematics. It offers a connected account of the mathematical theory of wave motion in a liquid with a free surface and subjected to gravitational and other forces, together with applications to a wide variety of concrete physical problems. A never-surpassed text, it remains of permanent value to a wide range of scientists and engineers concerned with problems in fluid mechanics. The four-part treatment begins with a presentation of the derivation of the basic hydrodynamic theory for non-viscous incompressible fluids and a description of the two principal approximate theories that form the basis for the rest of the book. The second section centers on the approximate theory that results from small-amplitude wave motions. A consideration of problems involving waves in shallow water follows, and the text concludes with a selection of problems solved in terms of the exact theory. Despite the diversity of its topics, this text offers a unified, readable, and largely self-contained treatment.
Author: Hasan Tosun
Publisher: BoD – Books on Demand
ISBN: 1789854792
Category : Technology & Engineering
Languages : en
Pages : 108
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Book Description
Dams and their auxiliary structures are built to provide water for human consumption, irrigating lands, generating hydroelectric power, and use in industrial processes. They are critical structures for continuing life and providing public safety. Construction of a dam is a complicated task that requires sophisticated modern technology and technical expertise. Scientists need to review and adjust their perspectives on designing embankments and their related structures, and compaction and consolidation of fill material, behavior of concrete materials, geotechnical and seismological studies of the dam site, total risk analysis, safety monitoring and instrumentation, heightening, hydrological studies, soil conservation, and watershed management. This book intends to provide the reader with a comprehensive overview of the latest information in dam engineering.
