Vibrations

ceramics and the FBG itself which presents a Young modulus of 70 GPa, close to that of steel as measured in section II. In an OVT the vibrations are mainly of 60 Hz, due to magnetic movement of the transformer core. However, in the case of an optical CT, there is no iron core to vibrate and then this equipment is noiseless and does not present this kind of 105 vibrations. Fig. 9 shows the results for several acquisitions accomplished employing with the sensor, a low dispersion of…

history; relate the operation of the resonant propagation and the characteristics of the mechanical waves; the movements vibratory and the definitions of waves, as well as, to relate the speeds of the sound in several means, through vibrations. These vibrations are transferred to the molecules of air which are around, and these last ones transfer the vibration to the neighbor molecules, allowing this way the propagation of energy. We usually think the perception that we have of our…

Veterinária e Processamento Tecnológico de Produtos de Origem Animal) Faculdade Medicina Veterinária, Universidade Federal Fluminense, Niterói, 2000. 95 BERARDINELLI, A.; DONATI, V.; GIUNCHI, A.; GUARNIERI, A.; RAGNI, L. Effects of transport vibrations on quality indices of shell eggs. Biosystems Engineering, v. 86, n. 4, p. 495-502, 2003. BERTECHINI, A. G. Mitos e verdades sobre o ovo e consumo. Disponível em: . Acesso em: agosto de 2004. BELITZ, H.D.; GROSCH, W. Química de…

eCatalogue. Disponível em: http://www.hoffmann- group.com/int/service-competence/downloads/machining-handbook.html. Acesso em 15/01/2011. HAYASHI, S. R.; THOMAS, C. E.; WILDES , D. G. (1988). Tool break detection by monitoring ultrasonic vibrations. CIRP Annals, v.37, n.1, p.61-64 ISO 3685 (1993). Tool-life testing with single-point turning tools. International Organization for Standardization, 2.ed, 48p. ISO 513 (2004). Classification and application of hard cutting…

eCatalogue. Disponível em: http://www.hoffmann- group.com/int/service-competence/downloads/machining-handbook.html. Acesso em 15/01/2011. HAYASHI, S. R.; THOMAS, C. E.; WILDES , D. G. (1988). Tool break detection by monitoring ultrasonic vibrations. CIRP Annals, v.37, n.1, p.61-64 ISO 3685 (1993). Tool-life testing with single-point turning tools. International Organization for Standardization, 2.ed, 48p. ISO 513 (2004). Classification and application of hard cutting…

Estimadores da FRF. Métodos de estimação de parâmetros nos domínios do tempo e da freqüência. Comparação de resultados da análise modal teórica e experimental. MAC. Introdução ao ajuste de modelos. REFERÊNCIAS: Bibliografia Básica: 1. ALLEMANG, R. J. Vibrations: Experimental modal Analysis. Cincinnati, OH, USA: University of Studies Press Ltd., 1999, 338p. 2. EWINS, D. J. Modal Testing-Theory and Practice. England: Research studies press Ltd, 1994, 313p. 3. MAIA, M. M.; SILVA, M. M.…

Vibrações EMENTA SUMÁRIO Fundamentos de vibrações. Sistemas de graus de liberdade. Controle e prevenção de vibrações. Diagnóstico de problemas em máquinas por vibrações. REFERÊNCIAS BÁSICAS GÉRADIN, Michel; RIXEN, Daniel. Mechanical vibrations: theory and application to structural dynamics. 2nd ed. New York: John Wiley & Sons, 1998-2010. GROEHS, Ademar Gilberto. Mecânica vibratória. 2. ed. São Leopoldo: Ed. UNISINOS, 2005. GERGES, Samir Nagi Yousri. Ruído: fundamentos e controle.

invisibilidade quando operando em espaço aéreo inimigo e até mesmo evitar que a pá entre em ressonância com o solo. Palavras chave: Aerodinâmica, Pá, Estático, Vibração. III Abstract This project aims to emphasize the importance of the study of vibrations in the airlines construction area, with a focus on the propulsion system of a helicopter, exceptionally, how it behaves one of the components, the rotor blades. First, a study of all the aerodynamic performance and the best…

between axes. If, in the working frequency range, there are any torsional natural frequencies the shaft may fail due to fatigue. This work presents a methodology for the optimum design of a viscoelastic dynamic neutralizer to reduce torsional vibrations in rotating systems. For such an objective some stages were developed as the project of a system for torsional measurements (torque and angular acceleration) and the development of a finite element code (evaluated and validated by…

N/A.(e.g. new machinery, new buildings, new plant protection products, modified cultivation practices, etc.) occur. Examples of hazards include but are not limited to: moving machine parts, power take-off (PTO), electricity, excessive noise, dust, vibrations, extreme temperatures, ladders, fuel storage, slurry tanks, etc. No N/A. The health, and safety and hygiene policyprocedures must at least includeaddress the points identified in the risk assessment (AF.3.1.1). This) and must be…