Unbalance Response Analysis of a Spinning Rotor Mounted on a Precessing Platform

  • Ankuran Saha
  • Rajesh Ghosh
  • Arghya NandiEmail author
  • Sumanta Neogy
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 1011)


The present work deals with analysis of a uniformly spinning shaft with a non-central disc mounted on a rotating (precessing) base, where the spin axis and the precession axis intersect at right angle. The motion of the rotor is such that it undergoes small elastic deformation superposed on rigid body rotation about a point. It is assumed that the shaft is axially and torsionally stiff and the disc has four degrees of freedom. Due to unbalance excitation, somewhat like a rotor on an orthotropic support, this rotor has also been found to undergo backwardwhirl.


Spin Precession Rotor Unbalance response Backward whirl 


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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  • Ankuran Saha
    • 1
  • Rajesh Ghosh
    • 1
  • Arghya Nandi
    • 1
    Email author
  • Sumanta Neogy
    • 1
  1. 1.Department of Mechanical EngineeringJadavpur UniversityKolkataIndia

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