Download or read book Mechanical Resonance Free and forced SHM of a torsional pendulum written by Laura Imperatori and published by GRIN Verlag. This book was released on 2014-02-03 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Essay from the year 2012 in the subject Physics - Mechanics, , language: English, abstract: In order to test SHM, the behaviour changes of a torsion pendulum due to different damping factors as well as its changes due to applying an external exciter were observed and compared with the theoretical expectations. The quality factor of the same damping state (with a brake current of 6A in the eddy brakes) was calculated using two different approaches and the resulting values were found to be within ơ of each one, as Q1 = 6.0±1.3 and Q2 = 7.5±0.7. The first approach was based on measuring the maximum displacement for each successive oscillation and deducing the slope from the plot of the natural logarithm of the amplitude against the number of oscillations. Differently, the second estimate of Q was obtained under forced oscillation conditions by taking the ratio of the experimentally determined resonance amplitude and the amplitude of natural oscillation.
Download or read book Investigation of the Effects of Damping and Forcing on the Motion of a Torsion Pendulum written by David Brückner and published by . This book was released on 2013 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific Study from the year 2013 in the subject Physics - Mechanics, printed single-sided, grade: -, University of Cambridge, language: English, abstract: The harmonic motion of a torsion pendulum under the action of damping and driving forces and the effect of these forces on the quality factor of the oscillation was examined in order to test the theory of harmonic oscillators. The pendulum was equipped with a driving motor as well as an eddy brake. The procedure consisted of two parts, first looking at the unforced and then the forced response, both at two different degrees of damping. Qualitatively, it was found that the behaviour agrees with the theory as the damped response decays exponentially and the amplitude against frequency plot of the forced case shows a well-defined resonance peak at a frequency close to the natural frequency, which was measured to be 0 = 3.306 0.006 s 1. It was found that the quality factor of the undamped and damped free response are 62 2 and 2.0 0.3 respectively. This confirms the fact that a better oscillator has a greater quality factor. The corresponding quality factor of the forced response with the same degree of damping as the latter was determined as 9.7 1.8.
Download or read book Introductory Course on Theory and Practice of Mechanical Vibrations written by J. S. Rao and published by New Age International. This book was released on 1999 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Book Presents The Theory Of Free, Forced And Transient Vibrations Of Single Degree, Two Degree And Multi-Degree Of Freedom, Undamped And Damped, Lumped Parameter Systems And Its Applications. Free And Forced Vibrations Of Undamped Continuous Systems Are Also Covered. Numerical Methods Like Holzers And Myklestads Are Also Presented In Matrix Form. Finite Element Method For Vibration Problem Is Also Included. Nonlinear Vibration And Random Vibration Analysis Of Mechanical Systems Are Also Presented. The Emphasis Is On Modelling Of Engineering Systems. Examples Chosen, Even Though Quite Simple, Always Refer To Practical Systems. Experimental Techniques In Vibration Analysis Are Discussed At Length In A Separate Chapter And Several Classical Case Studies Are Presented.Though The Book Is Primarily Intended For An Undergraduate Course In Mechanical Vibrations, It Covers Some Advanced Topics Which Are Generally Taught At Postgraduate Level. The Needs Of The Practising Engineers Have Been Kept In Mind Too. A Manual Giving Solutions Of All The Unsolved Problems Is Also Prepared, Which Would Be Extremely Useful To Teachers.
Download or read book Elements of the Theory of Resonance Illustrated by the Motion of a Pendulum written by Ernest William Brown and published by . This book was released on 1932 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rheology Handbook written by Thomas Mezger and published by European Coatings. This book was released on 2020-08-25 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Already in its 5th edition, this standard work describes the principles of rheology clearly, vividly and in practical terms. The book includes the rheology of additives in waterborne dispersions and surfactant systems. Not only it is a great reference book, it can also serve as a textbook for studying the theory behind the methods. The practical use of rheology is presented in the areas quality control, production and application, chemical and mechanical engineering, materials science and industrial research and development. After reading this book, the reader should be able to perform tests with rotational and oscillatory rheometers and interpret the results correctly.
Download or read book Handbook of Physical Testing of Paper written by Richard E. Mark and published by CRC Press. This book was released on 2002 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists from academic and the paper industry compile as many aspects of testing properties of paper as possible into a broad reference to help people who plan, specify, and evaluate the physical and mechanical testing of paper material take advantage of the many developments in recent years. An initial essay in each volume discusses the independent invention and widespread use of paper in Mesoamerica beginning sometime before AD 660. The two volumes are paged and indexed separately, but do not seem to be topically distinct. The first edition, Handbook of Physical and Mechanical Testing of Paper and Paperboard appeared in 1983; the second contains 30 chapters, a third of which are new and the others substantially revised, updated, and expanded. c. Book News Inc.
Download or read book Physical Properties of Macromolecules written by Laurence A. Belfiore and published by John Wiley & Sons. This book was released on 2010-10-19 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Explains and analyzes polymer physical chemistry research methods and experimental data Taking a fresh approach to polymer physical chemistry, Physical Properties of Macromolecules integrates the two foundations of physical polymer science, theory and practice. It provides the tools to understand polymer science concepts and research methods, while also instructing how to analyze experimental data. Drawing on the author's own extensive research in physical properties of polymers as well as more traditional topics, this text offers detailed analysis of numerous problems in polymer science, including laboratory data and research results. Topics include: Solid-state dynamics of polymeric materials Glass transitions in amorphous polymers Semicrystalline polymers and melting transitions Viscoelastic behavior Relaxation processes Macromolecule-metal complexes Mechanical properties of linear and crosslinked polymers Filled with detailed graphs to help explain important quantitative trends, Physical Properties of Macromolecules teaches by example, ensuring comprehension of the subject as well as the methodology to implement theory, problem-solving techniques, and research results in practical situations. This resource serves as the ideal companion for government laboratories, industrial research scientists, engineers, and professionals in polymer science fields who are interested in fully grasping all aspects of physical polymer science.
Download or read book Elements of the Theory of Resonance Illustrated by the Motion of a Pendulum written by E. W. Brown and published by Bushnell Press. This book was released on 2007-03 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: PREFACE. THE Author of this very practical treatise on Scotch Loch - Fishing desires clearly that it may be of use to all who had it. He does not pretend to have written anything new, but to have attempted to put what he has to say in as readable a form as possible. Everything in the way of the history and habits of fish has been studiously avoided, and technicalities have been used as sparingly as possible. The writing of this book has afforded him pleasure in his leisure moments, and that pleasure would be much increased if he knew that the perusal of it would create any bond of sympathy between himself and the angling community in general. This section is interleaved with blank shects for the readers notes. The Author need hardly say that any suggestions addressed to the case of the publishers, will meet with consideration in a future edition. We do not pretend to write or enlarge upon a new subject. Much has been said and written-and well said and written too on the art of fishing but loch-fishing has been rather looked upon as a second-rate performance, and to dispel this idea is one of the objects for which this present treatise has been written. Far be it from us to say anything against fishing, lawfully practised in any form but many pent up in our large towns will bear us out when me say that, on the whole, a days loch-fishing is the most convenient. One great matter is, that the loch-fisher is depend- ent on nothing but enough wind to curl the water, -and on a large loch it is very seldom that a dead calm prevails all day, -and can make his arrangements for a day, weeks beforehand whereas the stream- fisher is dependent for a good take on the state of the water and however pleasant and easy it may be for one living near the banks of a good trout stream or river, it is quite another matter to arrange for a days river-fishing, if one is looking forward to a holiday at a date some weeks ahead. Providence may favour the expectant angler with a good day, and the water in order but experience has taught most of us that the good days are in the minority, and that, as is the case with our rapid running streams, -such as many of our northern streams are, -the water is either too large or too small, unless, as previously remarked, you live near at hand, and can catch it at its best. A common belief in regard to loch-fishing is, that the tyro and the experienced angler have nearly the same chance in fishing, -the one from the stern and the other from the bow of the same boat. Of all the absurd beliefs as to loch-fishing, this is one of the most absurd. Try it. Give the tyro either end of the boat he likes give him a cast of ally flies he may fancy, or even a cast similar to those which a crack may be using and if he catches one for every three the other has, he may consider himself very lucky. Of course there are lochs where the fish are not abundant, and a beginner may come across as many as an older fisher but we speak of lochs where there are fish to be caught, and where each has a fair chance. Again, it is said that the boatman has as much to do with catching trout in a loch as the angler. Well, we dont deny that. In an untried loch it is necessary to have the guidance of a good boatman but the same argument holds good as to stream-fishing...
Download or read book An Introduction to the Mechanical Properties of Solid Polymers written by I. M. Ward and published by John Wiley & Sons. This book was released on 2005-08-19 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides a comprehensive introduction to the mechanical behaviour of solid polymers. Extensively revised and updated throughout, the second edition now includes new material on mechanical relaxations and anisotropy, composites modelling, non-linear viscoelasticity, yield behaviour and fracture of tough polymers. The accessible approach of the book has been retained with each chapter designed to be self contained and the theory and applications of the subject carefully introduced where appropriate. The latest developments in the field are included alongside worked examples, mathematical appendices and an extensive reference. Fully revised and updated throughout to include all the latest developments in the field Worked examples at the end of the chapter An invaluable resource for students of materials science, chemistry, physics or engineering studying polymer science
Download or read book Polymer Analysis written by Ting Kai Wu and published by John Wiley & Sons. This book was released on 1978 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Boundary Layer Flow over Elastic Surfaces written by Viktor V. Babenko and published by Butterworth-Heinemann. This book was released on 2012-09-29 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: While other methods of drag reduction are well-known in marine R&D and ship design environments worldwide, compliant coating drag reduction remains less well-known and poorly understood. This important book presents cutting-edge techniques and findings from research sources not generally accessible by Western researchers and engineers, aiding the application and further development of this potentially important technology. Beginning with an introduction to drag reduction that places the authors’ work on elastic surfaces and combined techniques in context, the book moves on to provide a comprehensive study of drag reduction through elastic coating with both flow and material properties considered. Coverage includes: Experimental findings around coherent vortical structures (CVS) in turbulent boundary layers and methods of controlling them Static and dynamic mechanical characteristics of elastic composite coatings, as well as new techniques and devices developed for their measurement Combined methods of flow control and drag reduction, including the effect of injection of polymer solutions, elastic coatings and generated longitudinal vortical structures on hydrodynamic resistance Intended as a reference for senior engineers and researchers concerned with the drag reduction and the dynamics of turbulent boundary layer flows, Boundary Layer Flow over Elastic Surfaces provides a unique source of information on compliant surface drag reduction and the experimental techniques around it that have shown measurable and repeatable improvements over recent years. This compilation of research findings and new techniques developed for measurement will aid R&D engineers, naval architects and senior designers in their quest to achieve drag reductions that will deliver significant efficiency savings. Unique source of information on compliant surface drag reduction—an important area of technology with practical application to ships—from otherwise inaccessible research studies Updates the knowledge-base on boundary layer flow and surface friction reduction, critical topics in the global quest for increased ship efficiency and fuel economy Reveals new techniques and devices developed for measurement and provides a comprehensive study of drag reduction through elastic coating with both flow and material properties covered
Download or read book The Free Oscillation of the Centrifugal Pendulum with Wide Angles The Forced Oscillation of the Centrifugal Pendulum with Wide Angles written by Francis Rendel Erskine Crossley and published by . This book was released on 1952 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Rheology Handbook written by Thomas G. Mezger and published by Vincentz Network GmbH & Co KG. This book was released on 2006 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1973 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Applied Polymer Processing Technology written by Nicholas P. Cheremisinoff and published by CRC Press. This book was released on 2020-10-07 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Offers detailed coverage of applied polymer processing--presenting a wide range of technologies and furnishing state-of-the-art data on polymer components, properties, and processibility. Reviews fundamental rheological concepts. Contains over 1600 bibliographic citations, some 450 equations, and over 400 tables, drawings, and photographs."
Download or read book An Introduction to Mechanical Vibrations written by Robert F. Steidel and published by John Wiley & Sons. This book was released on 1980 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Third Edition of the well-received engineering text retains the clarity of exposition that made the previous editions so popular, and contains the most widely-used problem sets in the business. Approach to vibration analysis is clear, concise, and simple, backed up by a wealth of problems and examples. Multi-degree-of-freedom problems are well-prefaced with two-degree-of-freedom cases. There is a special treatment of damping, including non-viscous problems (standard texts make much use of viscous damping, but most practical examples are not viscous). Now includes an excellent development of Rayleigh's principle and an introduction to finite element vibration analysis. Contains 100 new problems.
Download or read book Torsional Pendulum for Forced and Coupled Vibration written by Maynard Campbell Sandford and published by . This book was released on 1959 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
