A systematic approach to research parameters of gas turbine engine supports: a multiphysical model of a damping support

The relevance of the study is due to the need to increase the efficiency of analyzing the dynamic characteristics of damping bearings of gas turbine engines, since existing finite element models are computationally complex and are not applicable for operational analysis, and simplified analytical models are focused on a generalized assessment of characteristics and have limited capabilities in the study of nonlinear contact and hydrodynamic effects. In this regard, this article is aimed at developing a multiphysical simulation model of a damping support of a gas turbine engine, providing a reliable study of its dynamic and damping characteristics as part of a virtual test complex. The leading research method is a systematic approach based on the integration of the Simscape libraries and the MATLAB Simulink Multibody environment, which allows for consistent modeling of mechanical, contact, and hydrodynamic processes in the bearing assembly and damping package, as well as parametric analysis of the effect of design characteristics on the dynamic response of the system. The article develops a multiphysical model of a damping support that implements the interaction of rolling elements, elastic-dissipative elements and a hydrodynamic medium, and studies the effect of the number of bands and corrugations of the damping package on the power and frequency characteristics of the support. The simulation results obtained on the basis of the developed model make it possible to quantify the effect of the design parameters of the damping bearings on the vibration stability of the rotor and can be used in the design, optimization and virtual prototyping of the support units of gas turbine engines.

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