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

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