Identification of the unbalance distribution in flexible rotors

Yuan Pin Shih*, An-Chen Lee

*Corresponding author for this work

Research output: Contribution to journalArticle

30 Scopus citations


This paper presents a new method for estimating unbalance distributions of flexible shafts and constant eccentricities of rigid disks based on the transfer matrix method for analyzing the steady-state responses of rotor-bearing systems, in which the transfer matrix of a flexible shaft is derived in a continuous sense with any spatial unbalance distribution. Rotary inertia, gyroscopic and transverse-shear effects are also included. When deflections and deflection angles of one free end are measurable, the unbalance distribution of shafts and disks can be estimated under operating conditions by the proposed method. The main advantage of this identification technique is that only the state vector of the one free end of the rotating shaft need to be measured. Justification of the method is presented by numerical simulations.

Original languageEnglish
Pages (from-to)841-857
Number of pages17
JournalInternational Journal of Mechanical Sciences
Issue number7
StatePublished - 1 Jul 1997


  • Flexible rotor
  • Unbalance identification

Fingerprint Dive into the research topics of 'Identification of the unbalance distribution in flexible rotors'. Together they form a unique fingerprint.

  • Cite this