Cybern Syst Anal

2019

DOI: 10.1007/s10559-019-00138-3

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Numerical Methods for Determining Stiffness Properties of a Bar Cross-Section

O. S. Gorodetsky¹,

²

,

Y. B. Filonenko³

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Cited by 3 publications

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“…Finally, numerical methods for calculating the stiffness of elements of arbitrary shape are described in [11,12].…”

Section: Literature Reviewmentioning

confidence: 99%

Parameter Identification of Nonlinear Bearing Stiffness for Turbopump Units of Liquid Rocket Engines Considering Initial Gaps and Axial Preloading

et al. 2021

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This article is devoted to developing a mathematical model of nonlinear bearing supports for turbopump units of liquid rocket engines considering initial gaps and axial preloading. In addition to the radial stiffness of the bearing support, this model also considers the stiffness of the bearing cage, the rotational speed of the rotor, axial preloading of the rotor (due to which the inner cage shifts relative to the outer, changing the radial stiffness of the support), as well as radial gaps between contact elements of the bearings. This model makes it possible to calculate the stiffness of the bearing supports more accurately. The proposed model is realized using both the linear regression procedure and artificial neural networks. The model’s reliability is substantiated by the relatively small discrepancy of the obtained evaluation results with the experimental data. As a result, this model will allow determining the critical frequencies of the rotor with greater accuracy. The results have been implemented within the experience of designing turbopump units for State Company “Yuzhnoye Design Office”.

“…Finally, numerical methods for calculating the stiffness of elements of arbitrary shape are described in [11,12].…”

Section: Literature Reviewmentioning

confidence: 99%

Parameter Identification of Nonlinear Bearing Stiffness for Turbopump Units of Liquid Rocket Engines Considering Initial Gaps and Axial Preloading

et al. 2021

View full text Add to dashboard Cite

This article is devoted to developing a mathematical model of nonlinear bearing supports for turbopump units of liquid rocket engines considering initial gaps and axial preloading. In addition to the radial stiffness of the bearing support, this model also considers the stiffness of the bearing cage, the rotational speed of the rotor, axial preloading of the rotor (due to which the inner cage shifts relative to the outer, changing the radial stiffness of the support), as well as radial gaps between contact elements of the bearings. This model makes it possible to calculate the stiffness of the bearing supports more accurately. The proposed model is realized using both the linear regression procedure and artificial neural networks. The model’s reliability is substantiated by the relatively small discrepancy of the obtained evaluation results with the experimental data. As a result, this model will allow determining the critical frequencies of the rotor with greater accuracy. The results have been implemented within the experience of designing turbopump units for State Company “Yuzhnoye Design Office”.

Numerical Analysis of the Stress-Strain State of Combined Steel and Concrete Structures

¹

,

²

,

³

et al. 2023

Lecture Notes on Data Engineering and Communications Technologies

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No abstract

Collisions of Strength Determination Modeling for Eccentrically Compressed Reinforced Concrete Constructions with Small Eccentricities by Normal Sections in Lira-FEM Software

Dmytrenko,

Usenko,

Yakovenko

2024

Lecture Notes in Civil Engineering

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No abstract

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