1/1/2023 0 Comments How to add friction in comsolThe second is a radial bases Neural Network and the third is a generalized regression Neural Network. The first is a feed-forward Neural Network which consists of three layers with neurons. The characteristic data obtained from COMSOL program is used to train three suggested neural networks. Decreasing the clearance between pads leads to an increase in the load carrying capacity of the bearing while it has minor effect on the other performance parameters. It was found that as the number of pads increases the load carrying capacity and the friction coefficient increase, while the attitude angle decreases. The effect of changing pad numbers (from 3 to 6 pads) and the pads clearance angles (from 2° to 6°) on the performance parameters such as the load carrying capacity, frictional torque and attitude angle was analyzed. COMSOL Multiphysics software is used to simulate the tilting pad journal bearing at different eccentricity ratios and pad clearances. The calculations predict that the formation of oxygen interstitials becomes increasingly difficult as higher temperatures and reducing conditions are approached.The objective of this paper is to study the effect of geometrical parameters on the performance of tilting pad journal bearing. In contrast, the predicted values for charged complexes are lower than the measured values. The predicted equilibrium properties and defect formation energies for neutral defect complexes match trends in the experimental literature quite well. The thermodynamic calculations enable the effects of system temperature and partial pressure of oxygen on defect formation energy to be determined. In particular, the density functional theory calculations are performed at the level of the spin polarized, generalized gradient approximation and includes the Hubbard U term as a result they predict the correct anti-ferromagnetic insulating ground state of uranium oxide. The computational approach integrates high accuracy ab initio electronic-structure calculations and thermodynamic analysis supported by experimental data. The stability range of intrinsic point defects in uranium dioxide is determined as a function of temperature, oxygen partial pressure, and non-stoichiometry.
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