mechanical vibration and shock analysis random vibration

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Mechanical Vibration And Shock Analysis Random Vibration

Author : Christian Lalanne
ISBN : 9781118931172
Genre : Science
File Size : 35. 51 MB
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The vast majority of vibrations encountered in the real environment are random in nature. Such vibrations are intrinsically complicated and this volume describes the process that enables us to simplify the required analysis, along with the analysis of the signal in the frequency domain. The power spectrum density is also defined, together with the requisite precautions to be taken in its calculations as well as the processes (windowing, overlapping) necessary to obtain improved results. An additional complementary method – the analysis of statistical properties of the time signal – is also described. This enables the distribution law of the maxima of a random Gaussian signal to be determined and simplifies the calculation of fatigue damage by avoiding direct peak counting.

Random Vibration

Author : Christi Lalanne
ISBN : 1560329882
Genre : Science
File Size : 22. 65 MB
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About the Series: This important new series of five volumes has been written with both the professional engineers and the academic in mind. Christian Lalanne explores every aspect of vibration and shock, two fundamental and crucially important areas of mechanical engineering, from both the theoretical and practical standpoints. As all products need to be designed to withstand the environmental conditions to which they are likely to be subjected, prototypes must be verified by calculation and laboratory tests, the latter according to specifications from national or international standards. The concept of tailoring the product to its environment has gradually developed whereby, from the very start of a design project, through the to the standards specifications and testing procedures on the prototype, the real environment in which the product being tested will be functioning is taken into account. The five volumes of Mechanical Shock and Vibration cover all the issues that need to be addressed in this area of mechanical engineering. The theoretical analyses are placed in the context of the real world and of laboratory tests - essential for the development of specifications. Volume III: Random Vibration The vast majority of vibrations encountered in the real environment are random in nature. Such vibrations are intrinistically complicated, and this volume describes the enabling process for simplification of the analysis required, and the analysis of the signal in the frequency domain. Power spectrum density is also defined, with the requisite precautions to be taken in its calculation described togther with the processes (windowing, overlapping) necessary for improved results. A further complementary method, the analysis of statistical properties of the time signal is described. This enables the distribution law of the maxima of a random Gaussian signal to be determined and simplifies calculation of fatigue damage to be made by the avoidance of the direct counting of peaks.

Mechanical Vibration Shock Random Vibration

Author : Christian Lalanne
ISBN : 1903996058
Genre : Mechanical engineering
File Size : 59. 92 MB
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The vast majority of vibrations encountered in the real environment are random. By their very nature, such vibrations are complicated. This volume describes the enabling process for simplification of the analysis required and the analysis of the signal in the frequency domain. Power spectrum density is defined, with precautions needed to be taken in its calculation described together with the processes (windowing, overlapping) needed to improve results. A further, complementary method, the analysis of statistical properties of the time signal, is described. This enables determination of the distribution law of the maxima of a random gaussian signal to be determined and simplification of calculation of fatigue damage to be made by the avoidance of the direct counting of peaks.

Mechanical Vibration And Shock Analysis Specification Development

Author : Christian Lalanne
ISBN : 9780470610367
Genre : Technology & Engineering
File Size : 87. 49 MB
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Mechanical Vibration and Shock Analysis, Second Edition Volume 5: Specification Development This volume focuses on specification development in accordance with the principle of tailoring. Extreme response and the fatigue damage spectra are defined for each type of stress (sinusoidal vibration, swept sine, shock, random vibration, etc.). The process for establishing a specification from the life cycle profile of the equipment which will be subject to these types of stresses is then detailed. The analysis takes account of the uncertainty factor, designed to cover uncertainties related to the real-world environment and mechanical strength, and the test factor, which takes account of the number of tests performed to demonstrate the resistance of the equipment. The Mechanical Vibration and Shock Analysis five-volume series has been written with both the professional engineer and the academic in mind. Christian Lalanne explores every aspect of vibration and shock, two fundamental and extremely significant areas of mechanical engineering, from both a theoretical and practical point of view. The five volumes cover all the necessary issues in this area of mechanical engineering. The theoretical analyses are placed in the context of both the real world and the laboratory, which is essential for the development of specifications.

Mechanical Vibration And Shock Analysis Mechanical Shock

Author : Christian Lalanne
ISBN : 9781118931141
Genre : Science
File Size : 50. 59 MB
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This volume considers the shock response spectrum, its various definitions, properties and the assumptions involved in its calculation. In developing the practical application of these concepts, the forms of shock most often used with test facilities are presented together with their characteristics and indications of how to establish test configurations comparable with those in the real, measured environment. This is followed by a demonstration of how to meet these specifications using standard laboratory equipment – shock machines, electrodynamic exciters driven by a time signal or a response spectrum – with a discussion on the limitations, advantages and disadvantages of each method.

Mechanical Vibration And Shock Analysis Fatigue Damage

Author : Christian Lalanne
ISBN : 9781118931202
Genre : Science
File Size : 72. 74 MB
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Fatigue damage in a system with one degree of freedom is one of the two criteria applied when comparing the severity of vibratory environments. The same criterion is also used for a specification representing the effects produced by the set of vibrations imposed in a real environment. In this volume, which is devoted to the calculation of fatigue damage, Christian Lalanne explores the hypotheses adopted to describe the behavior of material affected by fatigue and the laws of fatigue accumulation. The author also considers the methods for counting response peaks, which are used to establish the histogram when it is not possible to use the probability density of the peaks obtained with a Gaussian signal. The expressions for mean damage and its standard deviation are established and other hypotheses are tested.

Mechanical Vibration And Shock Analysis Sinusoidal Vibration

Author : Christian Lalanne
ISBN : 9781118931097
Genre : Science
File Size : 40. 33 MB
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Everything engineers need to know about mechanical vibration and shock...in one authoritative reference work! This fully updated and revised 3rd edition addresses the entire field of mechanical vibration and shock as one of the most important types of load and stress applied to structures, machines and components in the real world. Examples include everything from the regular and predictable loads applied to turbines, motors or helicopters by the spinning of their constituent parts to the ability of buildings to withstand damage from wind loads or explosions, and the need for cars to maintain structural integrity in the event of a crash. There are detailed examinations of underlying theory, models developed for specific applications, performance of materials under test conditions and in real-world settings, and case studies and discussions of how the relationships between these affect design for actual products. Invaluable to engineers specializing in mechanical, aeronautical, civil, electrical and transportation engineering, this reference work, in five volumes is a crucial resource for the solution of shock and vibration problems. The relative and absolute response of a mechanical system with a single degree of freedom is considered for an arbitrary excitation, and its transfer function is defined in various forms. The characteristics of sinusoidal vibration are examined in the context both of the real world and of laboratory tests, and for both transient and steady state response of the one-degree-of-freedom system. Viscous damping and then non-linear damping are considered. The various types of swept sine perturbations and their properties are described and, for the one-degree-of-freedom system, the consequence of an inappropriate choice of sweep rate are considered. From the latter, rules governing the choice of suitable sweep rates are then developed.

Mechanical Vibration Shock Mechanical Shock

Author : Christian Lalanne
ISBN : UOM:39015051552969
Genre : Mechanical engineering
File Size : 43. 30 MB
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In this second volume of a series of five, the shock response spectrum, its various definitions, its properties and the precautions involved in its calculation are considered. In developing the practical application of these concepts, the shock shapes most often used with test facilities are presented, together with their characteristics and indications of how to establish test facilities comparable with those of the real measured environment. It is then shown how these specifications may be met with standard laboratory equipment - shock machines, electrodynamic exciters driven by a time signal or by a response spectrum - with the limitations, advantages and disadvantages of each method discussed.

Vibration And Shock Handbook

Author : Clarence W. de Silva
ISBN : 142003989X
Genre : Technology & Engineering
File Size : 58. 32 MB
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Every so often, a reference book appears that stands apart from all others, destined to become the definitive work in its field. The Vibration and Shock Handbook is just such a reference. From its ambitious scope to its impressive list of contributors, this handbook delivers all of the techniques, tools, instrumentation, and data needed to model, analyze, monitor, modify, and control vibration, shock, noise, and acoustics. Providing convenient, thorough, up-to-date, and authoritative coverage, the editor summarizes important and complex concepts and results into “snapshot” windows to make quick access to this critical information even easier. The Handbook’s nine sections encompass: fundamentals and analytical techniques; computer techniques, tools, and signal analysis; shock and vibration methodologies; instrumentation and testing; vibration suppression, damping, and control; monitoring and diagnosis; seismic vibration and related regulatory issues; system design, application, and control implementation; and acoustics and noise suppression. The book also features an extensive glossary and convenient cross-referencing, plus references at the end of each chapter. Brimming with illustrations, equations, examples, and case studies, the Vibration and Shock Handbook is the most extensive, practical, and comprehensive reference in the field. It is a must-have for anyone, beginner or expert, who is serious about investigating and controlling vibration and acoustics.

Mechanical Vibration And Shock Measurements

Author : Jens Trampe Broch
ISBN : STANFORD:36105030023241
Genre : Vibration
File Size : 75. 49 MB
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