Download or read book Free and Forced Vibrations of an Infinitely Long Cylindrical Shell in an Infinite Acoustic Medium written by H. H. Bleich and published by . This book was released on 1952 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is presented which permits the determination of the frequencies of vibrations of infinitely long thin cylindrical shells in an acoustic medium. Expressions are obtained for the displacements of the shell and for the pressures in the medium in the case of forced vibrations due to sinusoidally distributed radial forces. The results indicate that there is a low-frequency range, where no radiation takes place, and a high-frequency range where the external force provides energy which is radiated. Resonance occurs in the low-frequency range only; in the high-frequency range it is prevented by the damping due to radiation. Free and forced vibrations of steel shells submerged in water are discussed; with limitations, the theory may be applied approximately to stiffened shells. The method requires only a minor modification to account for the effect of static pressure in the surrounding medium. The treatment of transient problems is also considered. If high-frequency terms occur in the force, or shock effects are wanted within a short time after the application of the force, a treatment using solely modes of vibration of the submerged structure would be incomplete, as additional terms occur in the solution. As an alternative approach, the modes of free vibration of the structure may be used as generalized coordinates which fully describe the response of the structure but leave the medium to be treated, by means of the differential equations for the potential or in any other way desired.
Download or read book Rotating Shell Dynamics written by Hua Li and published by Elsevier. This book was released on 2005-01-19 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are numerous engineering applications for high-speed rotating structures which rotate about their symmetric axes. For example, free-flight sub-munition projectiles rotate at high speeds in order to achieve an aerodynamically-stable flight. This is the first book of its kind to provide a comprehensive and systematic description of rotating shell dynamics. It not only provides the basic derivation of the dynamic governing equations for rotating shells, but documents benchmark results for free vibration, critical speed and parametric resonance. It is written in a simple and clear manner making it accessible both the expert and graduate student. The first monograph to provide a detailed description of rotating shell dynamics Dynamic problems such as free vibration and dynamic stability are examined in detail, for basic shells of revolutions
Download or read book The Shock and Vibration Bulletin written by and published by . This book was released on with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vibration of Shells written by Arthur W. Leissa and published by . This book was released on 1973 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vibrational characteristics and mechanical properties of shell structures are discussed. The subjects presented are: (1) fundamental equations of thin shell theory, (2) characteristics of thin circular cylindrical shells, (3) complicating effects in circular cylindrical shells, (4) noncircular cylindrical shell properties, (5) characteristics of spherical shells, and (6) solution of three-dimensional equations of motion for cylinders.
Download or read book Mechanics of Underwater Noise written by Donald Ross and published by Elsevier. This book was released on 2013-10-22 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mechanics of Underwater Noise elucidates the basic mechanisms by which noise is generated, transmitted by structures and radiated into the sea. Organized into 10 chapters, this book begins with a description of noise, decibels and levels, significance of spectra, and passive sonar equation. Subsequent chapters discuss sound waves in liquids; acoustic radiation fundamentals; wind-generated ocean ambient noise; vibration isolation and structural damping; and radiation by plate flexural vibrations. Other chapters address cavitation, propeller cavitation noise, radiation by fluctuating-force (dipole) sources, and mechanical noise sources. This book will be helpful as a self-education text and as a reference for workers in the field.
Download or read book Acoustic Radiation of a Cylindrical Bar and an Infinite Plate Excited by the Field of a Ship Propeller written by Stavros Tsakonas and published by . This book was released on 1963 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: In one instance, an infinitely long elastic beam with circular cross section and in another an in finite elastic plate are immersed in an acoustic fluid parallel to an operating marine propeller. The pressure field generated by the propeller and transmitted and radiated by cylindrical beam or plate is studied by means of Fourier transform techniques. Analytic expressions for the pres sure signals due to the scattering and radiating mechanisms are obtained at large distances from the disturbance and a study is made of their dependence on such important parameters as pro peller clearance, reduced frequencies, number of blades, propeller loading and geometry as well as the elastic properties of the boundary. Further more, closed form expressions of extreme sim plicity are developed for the propeller-induced vibratory force on the cylinder and on the plate. Numerical results are obtained on the assumption of constant loading for a 2- 3- and 4-bladed propeller at various distances and different pro peller clearances. The calculated sound pressures for realistic values of the parameters indicate that an appreciable sound level is obtained through the mechanism of the elastic boundary reaction to the propeller motion. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1960 with total page 1006 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Acoustics written by Joshua E. Greenspon and published by CRC Press. This book was released on 2016-04-19 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: From jet engine noise that generates vibrations in the structure of an aircraft, to the sound radiation from the hull of a ship or submarine that makes it identifiable, an understanding of structural acoustics is key in the design process in maritime, automotive, aerospace, and architectural engineering. Building on classic works in the field, Stru
Download or read book Dynamic Response of a Cylindrical Shell Immersed in a Potential Fluid written by Garth Ellis Cummings and published by . This book was released on 1978 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report Naval Ship Research and Development Center written by David W. Taylor Naval Ship Research and Development Center and published by . This book was released on 1954 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Army Symposium on Solid Mechanics 1968 Held at the Johns Hopkins University Baltimore Maryland September 10 11 1968 written by and published by . This book was released on 1968 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliographical Review of Panel Flutter and Effects of Aerodynamic Noise written by J. V. Rattayya and published by . This book was released on 1959 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1977 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magazine of Concrete Research written by and published by . This book was released on 1954 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subject Index to Unclassified ASTIA Documents written by Defense Documentation Center (U.S.) and published by . This book was released on 1960 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the 5th International Conference on Structural Mechanics in Reactor Technology ICC Berlin Germany 13 17 August 1979 written by Thomas A. Jaeger and published by Elsevier Science & Technology. This book was released on 1979 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions of the International Conference on Structural Mechanics in Reactor Technology written by and published by . This book was released on 1983 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
