Parametric Sensitivity Analysis of Tilting Pad Bearings to Investigate the Dynamic Behavior of Rotating Machines

Author(s)

Ito, L. R. ; Ramos, D. J. ; Silveira, Z. de C. ; Daniel, G. B. ; Cavalca, KL ; Weber, HI

• Document type: Journal article
• Source: PROCEEDINGS OF THE 10TH INTERNATIONAL CONFERENCE ON ROTOR DYNAMICS - IFTOMM, VOL. 1; v. 60, p. 15-pg., 2019-01-01.

Abstract

This paper presents a parametric sensitivity analysis based on Design of Experiments (DoE) applied to tilting pad bearings. The main objective is to explore a set of design parameters and its influence on the dynamic response of a rotor system. In this way, the computational analysis was based on the integration of the commercial design software HEEDS (R) and a numerical code that was implemented in MATLAB (R) to simulate the rotordynamics phenomena. The rotor system was modelled as Timoshenko beam and the computational model was implemented using Finite Element Method (FEM). The Finite Volume Method (FVM) was applied to the tilting pad bearings in order to determine the synchronously reduced equivalent stiffness and damping coefficients. The results indicate that the fluid film bearing has a strong effect on dynamic behavior of the rotating system and that a correct choice for its main geometric parameters can result in a safer operation condition by increasing the values of the second critical speed components. Since small variations in the design parameters can significantly change the rotating machine behavior is necessary to rigidly control their values during both processes of manufacturing and assembly. (AU)

• FAPESP's process: 15/20363-6 - Fault tolerant identification and control of rotating systems
• Grantee: Katia Lucchesi Cavalca Dedini
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 16/20975-4 - Effects of the cavitation in hydrodynamic bearings on the dynamic behavior of rotors
• Grantee: Douglas Jhon Ramos
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 15/20036-5 - Study of the lubrication conditions and power losses in lubricated joint of mechanisms
• Grantee: Gregory Bregion Daniel
• Support Opportunities: Regular Research Grants