Rotating Machines
Mostrando 13-20 de 20 artigos, teses e dissertações.
-
13. ANÁLISE DE VIBRAÇÕES DE SISTEMAS LINEARES E NÃO-LINEARES NO CONTEXTO DA FORMULAÇÃO FRACA, ANÁLISE MODAL E DECOMPOSIÇÃO DE KARHUNEN-LOÈVE / VIBRATION ANALYSIS OF LINEAR AND NON-LINEAR SYSTEMS IN THE CONTEXT OF WEAK-FORMULATION, MODAL ANALYSIS AND KARHUNEN-LOÈVEN BASIS
Vibration Analysis is treated in the context of weak formulation. A continuous system is formulated in the Hilbert space and one base is selected to project the dynamics. An approximation scheme is guaranteed by increasing the number of functions in the base used to represent the response. This is the idea behind methods like the Finite Element Method and As
Publicado em: 2005
-
14. Feasibility of influencing the dynamic fluid film coefficients of a multirecess journal bearing by means of active hybrid lubrication
The main objective of this research project is the investigation of multirecess hydrostatic journal bearings with active hybrid (hydrostatic and hydrodynamic) lubrication. This paper gives a theoretical contribution to the modeling of this kind of bearing, combining computational fluid dynamics and control techniques. The feasibility of influencing the dynam
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2003-04
-
15. Ajuste de modelos lineares aplicado a maquinas rotativas
Generally, when talking about the design procedure and simulation of rotors, the approaches and inherent hypotheses to the applicable mathematical models to such types of machines bring numerical responses different from that obtained in experimental mensurements. The models updating theory has for objective to minimize such kind of errors through techniques
Publicado em: 2000
-
16. Identificação das propriedades dinamicas de mancais segmentados hibridos : teoria e experimento
The stability of rotating machines is strongly related to the type of coupling between the rotating and stationary parts. The bearings are one of the most important stationary part for defining the operational stability range of such a kind of machines. The goal of this research work is to study a new type of hydrid lubrication, where the oil is electro nica
Publicado em: 1999
-
17. Analise numerica e experimental do comportamento dinamico de palhetas flexiveis
The development of the equations of motion for flexible blades coupled to rotating machines is presented in this work. These equations are discretized using the Finite Element Method, with a three-dimensional approach. It was firstly developed a computer program using the MATLAB language in order to study the natural frequencies variation in blades with simp
Publicado em: 1998
-
18. ESTUDO SOBRE O ESTADO DO ISOLAMENTO DE MÁQUINAS ELÉTRICAS ROTATIVAS DE ALTA TENSÃO / A STUDY RELATED WITH THE ISOLATION CONDITION OF HIGH TENSION ROTATING ELECTRIAL MACHINES
O Monitoramento do Sistema de Isolamento em Máquinas Elétricas de Alta Tensão representa um avanço no que diz respeito ao planejamento operacional de uma indústria. Com posse de dados on-line referentes às condições apresentadas pelos isolamentos, as devidas precauções podem ser tomadas, evitando danos maiores. O trabalho apresentado tem como objet
Publicado em: 1997
-
19. Determinação de amortecimento otimo em sistemas mecanicos rotativos
Rotating machines are subjected to many dynamical effects. In certain situations it is desirable to decrease the leveI of vibration, so that the structure that supports it will not be damaged, to improve the performance, or to reduce the noise. This work deals with the study of the introduction of passive damping in rotating machines with the purpose of redu
Publicado em: 1992
-
20. Feasibility studies in spheronization and scale-up of ibuprofen microparticulates using the rotor disk fluid-bed technology
The aim of this study was to develop spheronized microparticulates as a drug delivery system using the 1-step closed rotor disk fluid-bed technology, and to scale up the batch spheronization process. Ibuprofen was used as the model drug and microcrystalline cellulose/sodium carboxymethyl cellulose hydrocolloid (Avicel® RC-581 or CL-611) was present as the d
Springer-Verlag.