Download or read book Nonlinear Acoustics Long Range Underwater Propagation Noncollinear Interaction Reflection and Refraction and Subharmonic Generation written by David T. Blackstock and published by . This book was released on 1986 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: (1) Nonlinear effects in underwater propagation. Two analytical-computational projects in this area are: (a) long range propagation of finite-amplitude pulses in a stratified, dissipative ocean, and (b) the pressure, temperature, and salinity dependence of the nonlinearity coefficient beta and related quantities. (2) Nonlinear, noncollinear interaction of sound waves. Two analytical and experimental studies of interaction in a rectangular waveguide are described. First, a monochromatic wave is generated in the 1,0 model of the waveguide, and distortion produces a second harmonic component in the 2,0 mode, a third harmonic component in the 3,0 mode, etc. Second, two primary waves are generated, a low frequency wave in the 0,0 mode and a high frequency wave in the 1,0 mode. Of main interest are the sum and difference frequency waves produced by the nonlinear interaction of the two primaries. In a third study, which is not limited to waveguides, the angular dependence of the nonlinearity coefficient beta was investigated. (3) Reflection and refraction of finite-amplitude sound at a plane interface between two fluids. The purpose of this work is to determine two fluids. The purpose of this work is to determine the applicability of Snell's law, the law of specular reflection, and other familiar small-signal results when the incident wave is of finite amplitude. (4) Investigation of subharmonic generation and chaos in an acoustical resonance tube.
Download or read book Nonlinear Acoustics Long Range Underwater Propagation Air Filled Porous Materials and Noncollinear Interaction in a Waveguide written by David T. Blackstock and published by . This book was released on 1985 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research on three topics in nonlinear acoustics is described. (1) Nonlinear effects in long range underwater propagation. The equations of nonlinear geometrical acoustics have been derived from the general equations of fluid mechanics for and inhomogeneous fluid. And analytical solution for the waveform of an arbitrary pressure signal traveling along a ray path has been implemented by a computer program. Not included in the program are effects of reflection and focusing. (2) Nonlinear effects in air-filled bulk porous materials. Theory and experiments on the propagation of intense airborne sound in bulk porous materials are described. The primary source of nonlinearity is the velocity dependent resistivity of the materials. (3) Nonlinear interaction in rectangular waveguide. Two problems are considered, (a) distortion of a wave launched as a single tone in the 1,0 mode of the waveguide, and (b) noncollinear interaction of two noncollinear tones, one a low frequency wave in the 0,0 mode, the other a high frequency wave in the 1,0 mode. Keywords include: Nonlinear acoustics; Long range propagation; Inhomogeneous fluid; Porous materials (air-filled); Waveform distortion; Rectangular waveguide; Noncollinear interaction; and Coefficient of nonlinearity.
Download or read book Technical Reports Awareness Circular TRAC written by and published by . This book was released on 1987-02 with total page 746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Underwater Acoustics written by Boris Konstantinovich Novikov and published by Acoustical Society of America. This book was released on 1987 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Parametric sound sources and receivers; Methods of calculation of nonlinear interactions in sound beams; Nonlinear interaction of plane waves; Method of the parabolic equation and basic results of linear diffraction theory; Parametric sound radiators with nondiffracting beams of pump waves; Calculation of different regimes of operation of the parametric radiator; Parametric receiving arrays; Operation of parametric radiators at high intensities of the pump waves; Thermal opto acoustic arrays; Construction features of parametric underwater devices; Experimental investigations and testing of parametric arrays; Parametric apparatus and the regions of their use, and Use of nomograms for calculation of the characteristics of a parametric radiator.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1987 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1987 with total page 954 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1987 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear effects in long range underwater acoustic propagation written by Frederick David Cotaras and published by . This book was released on 1985 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Acoustics written by Robert Thomas Beyer and published by . This book was released on 1975 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: CONTENTS: Introduction -- The Nature of Nonlinear Acoustics, Historical Aspects; Principles of Linear Acoustics; Some Sources of Nonlinear Oscillations; Nonlinear Propagation in Fluids; Shock Waves; Aeroacoustics; Radiation Pressure; Streaming; Cavitation; Nonlinear Interaction of Sound Waves; Applications of Nonlinear Interactions. The Parametric Array; Nonlinear Propagation in Solids.
Download or read book Sound Propagation written by Yang-Hann Kim and published by John Wiley & Sons. This book was released on 2010-08-13 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Sound Propagation: An Impedance Based Approach, Professor Yang-Hann Kim introduces acoustics and sound fields by using the concept of impedance. Kim starts with vibrations and waves, demonstrating how vibration can be envisaged as a kind of wave, mathematically and physically. One-dimensional waves are used to convey the fundamental concepts. Readers can then understand wave propagation in terms of characteristic and driving point impedance. The essential measures for acoustic waves, such as dB scale, octave scale, acoustic pressure, energy, and intensity, are explained. These measures are all realized by one-dimensional examples, which provide mathematically simplest but clear enough physical insights. Kim then moves on to explaining waves on a flat surface of discontinuity, demonstrating how propagation characteristics of waves change in space when there is a distributed impedance mismatch. Next is a chapter on radiation, scattering, and diffraction, where Kim shows how these topics can be explained in a unified way, by seeing the changes of waves due to spatially distributed impedance. Lastly, Kim covers sound in closed space, which is considered to be a space that is surrounded by spatially distributed impedance, and introduces two spaces: acoustically large and small space. The bulk of the book is concerned with introducing core fundamental concepts, but the appendices are included as the essentials as well to cover other important topics to extend learning. Offers a less mathematically-intensive means to understand the subject matter Provides an excellent launching point for more advanced study or for review of the basics Based on classroom tested materials developed over the course of two decades Companion site for readers, containing animations and MATLAB code downloads Videos and impedance data available from the author's website Presentation slides available for instructor use Sound Propagation is geared towards graduate students and advanced undergraduates in acoustics, audio engineering, and noise control engineering. Practicing engineers and researchers in audio engineering and noise control, or students in engineering and physics disciplines, who want to gain an understanding of sound and vibration concepts, will also find the book to be a helpful resource.
Download or read book The Abyssal Pacific written by Walter Heinrich Munk and published by . This book was released on 1967 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Damage Detection in Composite Materials written by John E. Masters and published by ASTM International. This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: A collection of 16 papers from an international symposium in San Antonio, November 1990, focusing on the necessary coordination between materials scientists, stress analysts, and non-destructive evaluation specialists, for successfully designing, building, certifying, and maintaining composite struc
Download or read book Supersonic Flow and Shock Waves written by Richard Courant and published by Springer Science & Business Media. This book was released on 1999-02-11 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Courant and Friedrich's classical treatise was first published in 1948 and tThe basic research for it took place during World War II. However, many aspects make the book just as interesting as a text and a reference today. It treats the dynamics of compressible fluids in mathematical form, and attempts to present a systematic theory of nonlinear wave propagation, particularly in relation to gas dynamics. Written in the form of an advanced textbook, it should appeal to engineers, physicists and mathematicians alike.
Download or read book A Comprehensive Guide to Lamb Waves written by Nitesh Prakash Yelve and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book presents the fundamental concept of Lamb wave propagation and its application for damage detection in metals and composites. The editor has taken utmost care to include a range of applications of Lamb waves, in the linear and nonlinear domains, in this book. Various damage location algorithms making use of linear characteristics of Lamb waves and a few case studies making use of nonlinear characteristics Lamb waves for damage detection are presented in a simple-to-understand way. Readers will find detailed descriptions for experiments, simulation, and signal processing. The last chapter that focuses on the evaluation of fatigue-induced material nonlinearity would help readers to understand the complex applications of Lamb waves. The forthcoming books in this series would include state-of-the-art applications of guided waves for damage detection, material characterization, and estimation of the remnant useful life of engineering structures"--
Download or read book A Textbook of Sound Being an Account of the Physics of Vibrations with Special Reference to Recent Theoretical and Technical Developments written by A. B. Wood and published by . This book was released on 1946 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Frequency Domain Analysis and Design of Nonlinear Systems based on Volterra Series Expansion written by Xingjian Jing and published by Springer. This book was released on 2015-02-17 with total page 339 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a systematic summary of some new advances in the area of nonlinear analysis and design in the frequency domain, focusing on the application oriented theory and methods based on the GFRF concept, which is mainly done by the author in the past 8 years. The main results are formulated uniformly with a parametric characteristic approach, which provides a convenient and novel insight into nonlinear influence on system output response in terms of characteristic parameters and thus facilitate nonlinear analysis and design in the frequency domain. The book starts with a brief introduction to the background of nonlinear analysis in the frequency domain, followed by recursive algorithms for computation of GFRFs for different parametric models, and nonlinear output frequency properties. Thereafter the parametric characteristic analysis method is introduced, which leads to the new understanding and formulation of the GFRFs, and nonlinear characteristic output spectrum (nCOS) and the nCOS based analysis and design method. Based on the parametric characteristic approach, nonlinear influence in the frequency domain can be investigated with a novel insight, i.e., alternating series, which is followed by some application results in vibration control. Magnitude bounds of frequency response functions of nonlinear systems can also be studied with a parametric characteristic approach, which result in novel parametric convergence criteria for any given parametric nonlinear model whose input-output relationship allows a convergent Volterra series expansion. This book targets those readers who are working in the areas related to nonlinear analysis and design, nonlinear signal processing, nonlinear system identification, nonlinear vibration control, and so on. It particularly serves as a good reference for those who are studying frequency domain methods for nonlinear systems.
Download or read book Optical CDMA Networks written by Hooshang Ghafouri-Shiraz and published by John Wiley & Sons. This book was released on 2012-04-04 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses heavily on the principles, analysis and applications of code-division multiple-access (CDMA) techniques in optical communication systems and networks. In this book, the authors intimately discuss modern optical networks and their applications in current and emerging communication technologies, evaluating the quality, speed and number of supported services. In particular, principles and fundamentals of optical CDMA techniques from beginner to advanced levels are heavily covered. Furthermore, the authors concentrate on methods and techniques of various encoding and decoding schemes and their structures, as well as analysis of optical CDMA systems with various transceiver models including advanced multi-level incoherent and coherent modulations with the architecture of access/aggregation networks in mind. Moreover, authors examine intriguing topics of optical CDMA networking, compatibility with IP networks, and implementation of optical multi-rate multi-service CDMA networks. Key features: Expanded coverage of optical CDMA networks, starts from principles and fundamentals Comprehensive mathematical modelling and analysis from signal to system levels Addresses the applications of modern optical networking in the current and emerging communication technologies Greater focus on advanced optical multi-level incoherent and coherent modulations, spreading codes, and transceiver designs Detailed hardware specifications, system-level block diagrams, and network nodes’ functionalities This book appeals to researchers, practicing engineers, and advanced students. It is a practical resource for readers with an interest in optical communications and networks.
