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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: 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: Shamil U. Galiev
Publisher: CRC Press
ISBN: 1351059386
Category : Science
Languages : en
Pages : 862
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Book Description
Modeling of Extreme Waves in Technology and Nature is a two-volume set, comprising Evolution of Extreme Waves and Resonances (Volume I) and Extreme Waves and Shock-Excited Processes in Structures and Space Objects (Volume II). The theory of waves is generalized on cases of extreme waves. The formation and propagation of extreme waves of various physical and mechanical nature (surface, elastoplastic, fracture, thermal, evaporation) in liquid and solid media, and in structural elements contacting with bubbly and cryogenic liquids are considered analytically and numerically. The occurrence of tsunamis, giant ocean waves, turbulence, and different particle-waves is described as resonant natural phenomena. Nonstationary and periodic waves are considered using models of continuum. The change in the state of matter is taken into account using wide-range determining equations. The desire for the simplest and at the same time general description of extreme wave phenomena that takes the reader to the latest achievements of science is the main thing that characterizes this book and is revolutionary for wave theory. A description of a huge number of observations, experimental data, and calculations is also given.
Author: Shamil U. Galiev
Publisher: CRC Press
ISBN: 100006400X
Category : Science
Languages : en
Pages : 373
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Book Description
The theory of waves is generalized on cases when waves change medium in which they appear and propagate. A reaction of structural elements and space objects to the dynamic actions of the different nature, durations, and intensities is studied. It considers the effects of transitions in the state and phase equations of media on the formation and propagation of extreme waves as a result of power, thermal, or laser pulsed action. The influence of cavitation and cool boiling of liquids, geometric and physical nonlinearity of walls on containers’ strength, and the formation of extreme waves is studied. The theory can be also used to optimize impulse technology, in particular, in the optimization of explosive processing of sheet metal by explosion in a liquid. This book was written for researchers and engineers, as well as graduate students in the fields of thermal fluids, aerospace, nuclear engineering, and nonlinear waves.
Author: Sh. U. Galiev
Publisher: Springer
ISBN: 3319169947
Category : Science
Languages : en
Pages : 362
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Book Description
This book examines the reasons behind the resonant amplification of seismic and ocean waves that have the capacity to destroy cities and ocean-going vessels. Using Charles Darwin’s important geophysical research as a starting point, it provides insights into the interaction between earthquakes with volcanoes, seaquake, and tsunami formation. In particular, the author details the observations that Darwin made on a powerful earthquake that occurred in Chile in 1835, noting how the famous naturalist and geologist used the concept of earthquake-induced vertical shock to explain the event's devastating impact. The book then goes on to show how Darwin's concept relates to the catastrophic results of the shallow quakes that recently destroyed Port-au-Prince (Haiti, 2010) and severely damaged Christchurch (New Zealand, 2011). In addition, the author asks whether Darwin's ideas are endorsed by the discoveries of modern science and whether the results of destructive earthquakes can be modeled using strongly nonlinear wave equations. Coverage also proposes that similar equations can be used to simulate the dynamics of many objects on the surface of the Earth, and to model the origin of the Universe, dark matter, and dark energy as strongly nonlinear wave phenomena. The book will appeal to students as well as researchers and engineers in geophysics, seismology, nonlinear wave studies, cosmology, physical oceanography, and ocean and coastal engineering. It will also be of use to those who are interested in the phenomena of natural catastrophes as well as those who want to learn more about the life and work of Charles Darwin.
Author: Adnan Ibrahimbegovic
Publisher: CRC Press
ISBN: 1351052489
Category : Technology & Engineering
Languages : en
Pages : 252
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Book Description
The effect of combined extreme transient loadings on a structure is not well understood—whether the source is man-made, such as an explosion and fire, or natural, such as an earthquake or extreme wind loading. A critical assessment of current knowledge is timely (with Fukushima-like disasters or terrorist threats). The central issue in all these problems is structural integrity, along with their transient nature, their unexpectedness, and often the uncertainty behind their cause. No single traditional scientific discipline provides complete answers, rather, a number of tools need to be brought together: nonlinear dynamics, probability theory, some understanding of the physical nature of the problem, as well as modeling and computational techniques for representing inelastic behavior mechanisms. Nonlinear Dynamics of Structures Under Extreme Transient Loads covers model building for different engineering structures and provides detailed presentations of extreme loading conditions. A number of illustrations are given quantifying; a plane crash or explosion induced impact loading, the effects of strong earthquake motion, and the impact and long-duration effects of strong stormy winds—along with a relevant framework for using modern computational tools. The book considers the levels of reserve in existing structures, and ways of reducing the negative impact of high-risk situations by employing sounder design procedures.
Author: Tetsuo Okada
Publisher: Springer Nature
ISBN: 981154624X
Category : Technology & Engineering
Languages : en
Pages : 1072
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Book Description
This book gathers the peer-reviewed proceedings of the 14th International Symposium, PRADS 2019, held in Yokohama, Japan, in September 2019. It brings together naval architects, engineers, academic researchers and professionals who are involved in ships and other floating structures to share the latest research advances in the field. The contents cover a broad range of topics, including design synthesis for ships and floating systems, production, hydrodynamics, and structures and materials. Reflecting the latest advances, the book will be of interest to researchers and practitioners alike.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 276
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Book Description
Author: Bernard LeMéhauté
Publisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 246
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1572
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Book Description
Author: Carlos Guedes Soares
Publisher: CRC Press
ISBN: 1315647192
Category : Technology & Engineering
Languages : en
Pages : 976
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Book Description
This three-volume work presents the proceedings from the 19th International Ship and Offshore Structures Congress held in Cascais, Portugal on 7th to 10th September 2015. The International Ship and Offshore Structures Congress (ISSC) is a forum for the exchange of information by experts undertaking and applying marine structural research.The aim of
