Open AccessIdentification of Unbalanced Forces and Foundation Parameters of Rotating Machines from Vibration Measurements
Author(s) -
N.G. Nalitoela
Publication year - 2008
Publication title -
tanzania journal of engineering and technology/tanzania journal of engeering and technology
Language(s) - English
Resource type - Journals
eISSN - 1821-536X
pISSN - 2619-8789
DOI - 10.52339/tjet.v31i2.433
Subject(s) - foundation (evidence) , vibration , rotor (electric) , stiffness , damper , structural engineering , engineering , identification (biology) , rotordynamics , control theory (sociology) , computer science , mechanical engineering , physics , acoustics , artificial intelligence , botany , control (management) , archaeology , biology , history
A technique is described to use measured vibration data of a rotating machine and its foundation to identify unbalanced forces, stiffness and damping parameters of the mountings, and the parameters of the foundation. It is based on an idealisation treating the rotor, the machine structure and the foundation as rigid masses supported by springs and dampers. Operational vibration data of the machine and its foundation before andafter the rotating unbalanced forces are perturbed by adding unbalanced mass to the rotor are used in the identification procedure. Once the parameters are identified, dynamic forces transmitted to the foundation can be estimated. The technique is demonstrated using simulated example for a machine with a two bearings rotor.