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|Type:||Artigo de evento|
|Title:||Development Of A Robust Reliability Methodology To Mechanical Systems Parameter Fitting|
|Author:||De Castro Silveira Z.|
|Abstract:||The technological systems are designed for carrying out very specific functions and for that its components demand measures that assure its operation inside of a range of precision. Due to the current complexity of those systems, inherent to the designs involving multi-disciplines aspects, their development and analysis exposes the designer to a series of unknown parameters coming from several sources, for example, properties of the material, environmental and operational conditions. Therefore, the qualification and quantification of those inherent sources of design uncertainties become so much important under several aspects under the context of the design development, as during its operation. A system is reliable and robust if can allow a range of uncertainties, before the first failure occurs. For the prediction of the robust reliability, there are three fundamentals stages: (1) formulation of the physical-mathematical model of the system in study; (2) definition of the failures criteria and (3) application of the uncertainties model for the confidence limits determination of the significant design parameters. Therefore, this work proposes the development of a methodology for identification of uncertainties sources and of the parameters that largely influence the whole design. The first stage is the formulation of the mathematical model of the system, and then following with the sensitivity analysis of those parameters, confronting them and its effects on the system. This study will be initially accomplished through a numerical model, and soon after in a experimental set-up. The first experimental assembly consists of a mass-spring system and the methodology must be extended to case-study of arotorthat is composed by a shaft with a centered mass, supported on two hydrodynamic bearings. That mechanical system is assembled on a rigid foundation.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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