Modal Analysis of Rotor System Using Modulated Co-ordinates for Asymmetric Rotor System with Anisotropic Stator

A new modal analysis method for general rotor systems with time-varying parameters is proposed. The essence of method is to introduce the modulated coordinates to derive the equivalent infinite order time-invariant matrix equation from the finite order time-varying matrix equation. Timevarying parameter equation is inevitable for general rotors, of which rotating and stationary parts both possess asymmetric properties. An extensive modal analysis method is rigorously developed for the infinite order time-invariant system and an approximate, yet effective modal analysis technique is introduced with the reduced order system, in order to derive four types of directional frequency response functions. It is shown theoretically that they can be effectively used for detection of the presence of system anisotropy and asymmetry. A numerical example with a simple rotor model and a flexible asymmetric rotor are also provided to demonstrate the theoretical findings and practicality of the proposed method.
Publisher
Professional Engineering Publishing (Institution of Mechanical Engineers)
Issue Date
2004
Citation

8th International Conference on Vibrations in Rotating Machinery, University of Swansea, UK, p575~584, 2004

URI
http://hdl.handle.net/10203/5181
Link
http://cwllab.kaist.ac.kr/papersdb/PDFfiles/588.pdf
Appears in Collection
ME-Conference Papers(학술회의논문)
Files in This Item
118.pdf(300.11 kB)Download
  • Hit : 423
  • Download : 332
  • Cited 0 times in thomson ci

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0