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Mechanical Vibrations |  |
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Mechanical Vibrations | |
This classic textbook by J. P. Den Hartog, retired professor of mechanical engineering at MIT, reflects the author's unique ability to combine the scholarly insight of a distinguished scientist with the practical, problem-solving orientation of an experienced industrial engineer. Although mathematics plays a role in the subject, Den Hartog employs the simplest possible mathematical approaches. His lucid explanations of complex problems are presented in a direct style and supported by illustrative models. Numerous figures in the text enhance its value as a basic foundation in a field which Den Hartog calls "a necessary tool for almost every mechanical engineer." The author examines such topics as the kinematics of vibration (including harmonic motions and non-harmonic periodic motions), degrees of freedom, gyroscopic effects, relaxation oscillations, Rayleigh's method, natural frequencies of torsional vibration, Karman vortices, and systems with variable elasticity. Drawing on his experience as an engineer in private industry and in the U.S. Navy's Bureau of Ships, Den Hartog applies theory to practice, discussing the effects of vibrations on turbines, electrical machines, helicopter rotors and airplane wings, diesel engines and electrical transmission lines.
As a special aid to classroom work or self-study, this practical text includes an extensive selection of 233 problems and answers that test the student's mastery of every section of the book. In addition, a highly useful Appendix contains "A Collection of Formulas" for determining the load per inch deflection of linear springs, the load per radian rotation of rotational springs, the natural frequencies of simple systems, the longitudinal and torsional vibration of uniform beams, the transverse or bending vibrations of uniform beams, and the vibrations of rings, membranes, and plates.
When Mechanical Vibrations was first published in 1934, it was a pioneering work in a field which had just been introduced in America's technical schools. In fact, the author wrote it to assist him in teaching the subject at Harvard. "During the life of the book," he says, "from 1934 on, the art and science of engineering has grown at an astonishing rate and the subject of vibration has expanded with it." Professor Den Hartog's constant revisions have kept his book at the forefront of this vital subject, as useful today as its earlier versions were to students of the past.
J. P. Den Hartog: The Reprint Engineer
J. P. Den Hartog (1901–1989), who taught for most of his career at MIT, was one of the founders of the Dover reprint program in engineering. As the author of several books that Dover reprinted and still has in print, and as an advisor from the 1950s until just a few years before his death in 1989, Professor Den Hartog gave invaluable advice concerning books of lasting interest and importance in his field.
Not many books in engineering have a productive shelf life spanning several decades. Among the exceptions are these four books of Professor Den Hartog, which Dover reprinted and occasionally revised in later printings from 1961 through 1987: Mechanics, 1961, Strength of Materials, 1961, Mechanical Vibrations, 1985, and Advanced Strength of Materials, 1987. Still widely read and cited by authors in these areas, Den Hartog's books are a tribute to his gift for exposition and clarity.
The J. P. Den Hartog Award, established in 1987, is presented in recognition of lifetime contributions to the teaching and practice of vibration engineering.
网友对Mechanical Vibrations的评论
Professor Den Hartog was dead for many years, but his authorities (including Mechanics, Strength of Materials, advanced Strength of Materials, etc.) are still very useful in your engineering career.
邓哈托的经典，书的印刷质量一般，就是有点太贵了。
I purchased Hartog's book together with Meirovitch's Fundamentals of Vibrations and Kelly's Schaum's Mechanical vibrations. I must say that Hartog and Meirovitch complement each other beautifully whereas Kelly's book feels a little superfluous.
It is clear from the book that Hartog himself had extensive experience with real world vibration analysis. The theory is developed while analyzing a range of mechanical mechanisms and electrical circuits that frequently are important in real vibrating systems. Hartogs book is therefore useful as a reference, for instance for how the piston excite vibrations in the engine frame. Although quite old, the book does not feel dated. The type setting is old school with numerous small but clear figures.
Meirovitch's book is more modern in its presentation. Meirovitch prepares the reader for modern methods of vibration analysis such as frequency response analysis of continuous systems with the aid of the finite element method. Meirovitch also make extensive use of matrix algebra and analytical mechanics. However, Meirovitch lacks in practical examples.
Overall I recomend the book, especially in combination with Meirovitch.
This book was first published in 1934 by McGraw-Hill and remained through 4 editions for 40 years one of McGraw-Hil's all-time best sellers in engineering and physics. It is filled with practical examples and continues to be a major source for down-to-earth explanations of vibrational phenomena. Partly because of the intellectual and practical impact of this book, the American Society of Mechanical Engineers established the ASME J. P. Den Hartog Award that recognizes life-ltime contributions to the teaching and practice of vibration engineering. All active workers who I know in vibration engineering own and frequently consult this book.
Mechanical Vibrations is a great reference book for the mechanical engineer. The print readability is not as good as modern textbooks but it contains all of the same information with real application and much more (which isn't always found in modern textbooks). It contains a great number of specialized applications such as airplane wing flutter, galloping of power lines and instability criterion (analogous to control systems stability criterion). This book helped me (entry level engineer) take a different perspective of real world engineering. It is also very similar to S. Timoshenko's Vibration Problems in Engineering. This book fills in the holes the Timoshenko left out such as an appendix of equivalent spring constants, natural frequencies and frequency modes corresponding to beams, springs and multiple DOF systems.
I found Hartog's descriptions of vibrating bodies on moving bases very helpful in the class, and as a supplement to both the lectures and the assigned reading for the class out of "Theory of Vibrations" (Horrible book by the way), the class ended up being not that bad. Hartog though doesn't include many examples which made really understanding the concepts straight from his book a bit difficult.
Well written; very clear; many practical examples of rotating machinery which are useful in design of structures to resist vibrations. This book gives true return on the dollar spent for same. den Hartog's explanations appreciated by students. Highly recommend as supplemental text or stand alone text for this topic in dynamics or vibrations courses.
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