Maintenance is considered a critical factor in the most diverse fields and is associated with several techniques. Among the existing preventive techniques, the lubrication plan guarantees a good operability of the components. The present study was carried out in a soy processing agribusiness located in the Southwest of the State of Goiás, Brazil, in which a device lubrication plan was identified and proposed. In addition, a survey was prepared between the number of grease applications, the amount of applied grease (g) and temperature (°C) of the components (bearings), and a multivariate regression model was suggested. The study was carried out from the monitoring of the work routines of the maintenance sector in a soy storage line, with the aid of a FLIR thermographic camera model E8. The proposal implemented in the study was able to reduce the costs of man-hours and consumables, and improve the reliability of equipment by the temperature indicator (°C).
Slender structural systems, susceptible to unstable bifurcation, generally lose stability at lower load levels than the linear buckling load of the perfect structure. In the present work, the different dynamic balance configurations in nonlinear oscillations are studied through a simple structural system given by a rigid-spring bar model with a degree of freedom. The purpose of this work is to study the different bifurcations and nonlinear oscillations through a parametric analysis of a simple structural system subject to buckling when subjected to compressive loads. To solve the calculations, computer programs such as Maple, Matlab, Visual Studio (C ++) were used, as well as Grapher to obtain the graphics. To obtain the stochastic responses of the studied model, the Legendre-Chaos polynomial will be used. Two particularities will be studied, which are the systems that present symmetrical bifurcation of the Butterfly type and the systems that present asymmetric bifurcation of the Swallowtail type, in both cases the bifurcations present an unstable initial post-critical path. Like the Butterfly-type bifurcation, Swallowtail is also significantly affected by the presence of uncertainties in the system's stiffness. Depending on the value that the uncertainty is inserted, an increase in the number of stable solutions can happen, but depending on the value it can also generate chaotic solutions. Regardless of the bifurcation analyzed, the results obtained behaved as the average of the limit results only for small values of Γ1 or for the solutions present in the pre-buckling potential valley.
A feira de profissões da universidade de Rio Verde na visão de seus visitantesThe professional fair of the university of Rio Verde in the view of its visitors
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