Mechanical Vibrations.
| Author/creator | Lalanne, Christian Author |
| Format | Electronic |
| Edition | 3rd ed. |
| Publication Info | Wiley-ISTE [Imprint] Hoboken : John Wiley & Sons, Incorporated |
| Description | 448 p. 23.400 x 016.400 cm. |
| Supplemental Content | Full text available from Ebook Central - Academic Complete |
| Summary | Annotation The object of this series of five volumes is thus to describe all the mathematical tools that are currently used in the analysis of vibrations and shocks, while starting with the sinusoidal vibrations. Sinusoidal vibrations were first used in laboratory tests to verify the ability of equipment to withstand their future vibratory environment in service without damage. Following the evolution of standards and testing facilities, these vibrations, generally speaking, are currently studied only to simulate vibratory conditions of the same nature as encountered, for example, in equipment situated close to revolving machinery (motors, transmission shafts, etc.). Nevertheless, their value lies in their simplicity, enabling the behavior of a mechanical system subjected to dynamic stress to be demonstrated, and the introduction of basic definitions. Given that, generally speaking, the real environment is more or less random in nature, with a continuous frequency spectrum in a relatively wide range, in order to overcome the inadequacies of the initial testing facilities, testing rapidly moved to the "swept sine" type. Here the vibration applied is a sinusoid, the frequency of which varies over time according to a sinusoidal or exponential law. Despite the relatively rapid evolution of electrodynamic exciters and electrohydraulic vibration exciters, capable of generating wide-band random vibrations, these swept sine standards have lasted, and are in fact still used, for example in aerospace applications. They are also widely used for measuring the dynamic characteristics of structures.After an introductory chapter (Chapter 1) to this series, pointing out the characteristics of some important vibratory environments and the various steps necessary to arrive at the qualification of a material, we follow-up with a few brief reminders of basic mechanics (Chapter 2), Chapter 3 examines the relative and absolute response of a mechanical system with one degree of freedom subjected to a given excitation, and defines the transfer function in different forms. Chapter 4 is devoted more particularly to the response of such a system to a unit impulse or to a unit step. The properties of sinusoidal vibrations are then presented in the context of the environment and in laboratory tests (Chapter 5). The transitory and steady state response of a system with one degree of freedom to viscous damping (Chapter 6) and to non-linear damping (Chapter 7) is then examined.Chapter 8 defines the various sinusoidal sweeping modes, with their properties and eventual justification. Chapter 9 is devoted to the response of a system with one degree of freedom subjected to linear and exponential sweeping vibrations, to illustrate the consequences of an unsuitable choice of sweep rate, resulting in the presentation of a rule for the choice of a rate.The major properties of the Laplace transform are reviewed in the Appendix. This provides a powerful tool for the analytical calculation of the response of a system with one degree of freedom to a given excitation. Inverse transforms particularly suitable for this application are given in a table. |
| Access restriction | Available only to authorized users. |
| Technical details | Mode of access: World Wide Web |
| Genre/form | Electronic books. |
| ISBN | 9781848216440 |
| ISBN | 1848216440 (Trade Cloth) Forthcoming |
| Standard identifier# | 9781848216440 |
| Stock number | 00028608 |
Availability
| Library | Location | Call Number | Status | Item Actions |
|---|---|---|---|---|
| Electronic Resources | Access Content Online | ✔ Available |