1,721,020 research outputs found
Porites fontanesii, a new species of hard coral (Scleractinia, Poritidae) from the southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden, and its phylogenetic relationships within the genus
No full textBenzoni, Francesca, Stefani, Fabrizio (2012): Porites fontanesii, a new species of hard coral (Scleractinia, Poritidae) from the southern Red Sea, the Gulf of Tadjoura, and the Gulf of Aden, and its phylogenetic relationships within the genus. Zootaxa 3447: 56-68, DOI: 10.5281/zenodo.28216
Computer-Aided Design of Pocket Elliptical Journal Bearings, Part 2: Application
No full textThe application of a computer-aided design method for pocket elliptical
bearings (Part 1) is discussed. The optimization of the bearing shape is performed for constant pocket clearance
Computer-Aided Design of Pocket Elliptical Journal Bearings, Part 1: Theory
No full textA computer-aided design procedure suitable for pocket elliptical journal bearings for turbomachineries is proposed. The concept of journal
mobility plot for post-processing of results is adapted to pocket elliptical bearings and to non-circular bearings
Design and fast verification of pocket elliptical journal bearings
No full textAlthough elliptical pocket bearings are widely used in turbomachineries, the influence of their design on performance has not been specifically investigated. A lot of works about tribological models are available, but few of them focus on their application to bearing design at industrial level.
The purpose of the work is to conceive a fast method to verify design and performance of elliptical pocket journal bearings.
The computer-aided verification of pocket journal bearings is performed by means of a suitable finite element analysis method.
The results of sample analyses indicate that the machining tolerances are very influential on elliptical pocket bearing performances and they must be included among the input data
Scorrimento corpo-cappello nel cuscinetto di testa di biella di un MCI: un modello semplificato per analisi EHD
No full textApplication of a Finite Element Quasi-3D Solution of the Energy Equation to the TEHD Analysis of Dynamically Loaded Journal Bearings
No full textTaking advantage of the quasi-three-dimensional (quasi-3D) solution of the energy equation in the lubricant film presented in a previous work, a new method for analyzing the lubrication of dynamically loaded bearings is proposed. Cavitation is taken into account with a mass-conserving formulation of the hydrodynamic problem, where viscosity variations through the oil thickness are considered. The heat exchanged by the lubricant film with the bearing and the shaft is computed. Hence the thermo-elastic expansion of both the journal and the sleeve can be considered, together with the mechanical deformations of the bearing
Finite Element Method Applied to Elasthohydrodynamic Lubrication of Dynamically Loaded Journal Bearings
No full textTEHD Analysis of Dynamically Loaded Journal Bearings Employing Mass and Energy Conserving Finite Element Algortihms
No full textA realistic analysis of dynamically loaded journal bearings requires the prediction of active
film region moving boundaries, thermal and elastic bearing deformations and viscosity
variations due to the temperature changes in lubricant film. The following paper is aimed to
develop, taking advantage of enhanced structural modeling, a thermo-elastohydrodynamic
(TEHD) analysis method, fully based on the finite element technique. To this purpose updated
mass and energy-conserving models, independent on the finite element type, are proposed. As
an example, the detailed (three-dimensional) TEHD analysis of a connecting rod big end
bearing is performed, using different formulations of the lubrication problem
Finite Element Analysis of Dynamically Loaded Journal Bearings: Influence of the Bolt Preload
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