Master thesis and internship[BR]- Master's thesis : Updating and standardization of design tools for the test facilities operated by BEBLUE Cryotech[BR]- Internship

Abstract

The accurate prediction and analysis of critical speeds are paramount for ensuring the safe and efficient operation of rotating machinery. This study focuses on the rotordynamic analysis of the Prometheus test rig, a system designed for cryogenic testing in aerospace applications. Using the Finite Element Method (FEM) in conjunction with the Rotordynamic Open Source Software(ROSS), this research aims to identify critical speeds and optimize the rotor-bearing configuration to mitigate resonance risks. Key aspects of the analysis include the development of a Campbell Diagram, which visually represents the relationship between rotor speed and system frequencies, highlighting potential resonance zones. The study further investigates the influence of various bearing configurations on critical speeds, providing insights into how changes in stiffness, damping, and positioning affect the dynamic behavior of the rotor system. Experimental data were used to validate the FEM model, ensuring the accuracy and reliability of the predictions. The findings from this study offer practical guidelines for optimizing rotor design in high-speed applications, particularly where cryogenic conditions are present. By enhancing the understanding of critical speeds and rotordynamic behavior, this work contributes to the development of more robust and reliable rotating machinery.