Vibrations

fenômenos tais como desalinhamentos e desbalanceamentos em máquinas. PALAVRAS-CHAVE: Máquinas rotativas, análise de vibrações, diagnóstico de defeitos. USE OF TABLES OF TEST FOR STUDY OF THE DYNAMIC BEHAVIOR OF ROTATING MACHINES MECHANICAL VIBRATIONS – ABSTRACT Rotating machines are devices used in different environments of daily life, becoming indispensable elements in human activities. Due to the high level of demand in such specialties, a deep knowledge of the dynamic…

pequenos enquanto o engenheiro estrutural tenta projetar a base da máquina de forma a assegurar que o efeito da vibração não se transmita. FIGURA 1.4 – Ponte de Tacoma Narrows durante vibração induzida pelo vento (Reproduzido de Rao, S., Mechanical Vibrations, Addison Wesley, 1990). 3 CONCEITOS BÁSICOS DE VIBRAÇÕES Vibração É qualquer movimento que se repete, regular ou irregularmente, depois de um intervalo de tempo. O movimento de um pêndulo e da corda de um violão são…

ABSTRACT DYNAMIC CHARACTERIZATION PROTOTYPE PSEUDOELASTIC OF A STOCKBRIDGE DAMPER Author: Antonio José da Silva Junior Supervisor: Edson Paulo da Silva Programa de Pós-graduação em Sistemas Mecatrônicos Brasília, August 2011 Dynamic vibrations absorbers such as the stockbridge dampers are largely used to minimize the aeolian vibration in overhead electrical power transmission lines. One of the main limitations of this type of absorber is the relatively narrow…

muitos músicos como Keith Emerson do Emerson Lake and Palmer começaram a usar os equipamentos, inclusive em turné. O teremim, que é extremamente difícil de ser executado, foi também usado na música popular. O teremim elétrico foi usado em "Good Vibrations" do The Beach Boys, o mellotron foi usado em "Strawberry Fields Forever" do The Beatles e o pedal de volume foi usado em "Yes It Is". Assim que a tecnologia evoluiu e os sintetizadores tornaram-se mais baratos, foram sendo adoptados…

AN – Anexo Nacional ao Eurocódigo 8 (EN 1998-1), Junho, 2009. Pereira, J., Métodos Probabilísticos em Engenharia Sísmica, Memória nº 442 - Laboratório Nacional de Engenharia Civil, Lisboa, 1974. Sólnes, J. - “Stochastic Processes and Random Vibrations” - John Wiley & Sons, Chichester, 1997. 22

errors back to the control circuit and to switch off the device immediately in such events. Repeated turn-on of the IGBT into a short circuit with a high frequency may destroy the device. Mechanical fixing on PCB: In applications with mechanical vibrations (vehicles)2 do not use a ty-rap for fixing the driver, but - after soldering and testing - apply special glue. Recommended types: CIBA GEIGY XP 5090 + 5091; PACTAN 5011; WACKER A33 (ivory) or N199 (transparent), applied around the case…

the left edge of the Tocantins River. ı ı The dismounting of the rocks caused discomfort to the population which complained about damages in the residences. In this way, the Seismological Observatory of the University of Bras´lia monitored the vibrations generated by blasting, with the aim to make a diagnosis and see if there is a relation between the detonations ı and the residences cracks. The velocity records of the particle vibration were obtained by engineering seismometer…

edição. Massachusetts, USA: MIT Press, 1997. REEVES, B. & NASS, C., The media equation: how people treat computers, television, and new media like real people and places. CSLI lecture notes. CSLI Publications, 1998. TAO, H. & HUANG, T., Connected vibrations: a modal analysis approach to non-rigid motion tracking. Proceedings in IEEE Conference on CVPR, 1:735–740, 1998. TAO, J. & TAN, T., Affective computing: A review. In: Tao, J.; Tan, T. & Picard, R., (Eds.). Affective Computing…

chemicals, waste products, and body fluids. A.2.14 Is the medical device susceptible to environmental influences? Factors that should be considered include the operational, transport, and storage environments. These include light, temperature, vibrations, spillage, susceptibility to variations in power and cooling supplies, and electromagnetic interference. A.2.15 Does the medical device influence the environment? Factors that should be considered include the effects on power and…

defined by the following standards for extreme atmospheric conditions: b IEC 68-2-42: atmospheres containing sulphur dioxide (SO 2) b IEC 68-2-43: atmospheres containing hydrogen sulphide (H2S). E51262B Vibrations Masterpact NW devices resist electromagnetic or mechanical vibrations. Tests are carried out in compliance with standard IEC 68-2-6 for the levels required by merchant-marine inspection organisations (Veritas, Lloyd's, etc.): b 2 to 13.2 Hz: amplitude ±1 mm b 13.2 to 100…