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Vibration Analysis of Machine Tool Spindle Systems: A Calibrated Finite Element Model

[+] Author Affiliations
Seyed M. Hashemi, Hemachandran Sambandamurthy, Hamid Ghaemi

Ryerson University, Toronto, ON, Canada

Paper No. IMECE2014-39547, pp. V04BT04A077; 6 pages
  • ASME 2014 International Mechanical Engineering Congress and Exposition
  • Volume 4B: Dynamics, Vibration, and Control
  • Montreal, Quebec, Canada, November 14–20, 2014
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4648-3
  • Copyright © 2014 by ASME


The effects of spindles vibrational behavior on the stability lobes and the chatter behavior of machine tools have been established, and the service life has been observed to reduce the system natural frequencies. In this paper, a ‘calibrated’ FEM model of the spindle system, where the bearings are modeled as linear spring elements, is introduced. The numerical models of a sample spindle system are developed in ANSYS® software using BEAM188 and SOLID187 elements. COMBIN14 elements are used to model the bearings; by varying the spring constant value of these elements the spindle’s fundamental frequency is tuned to match the nominal value, also verified experimentally. The beam element-based model is observed to converge faster than the one based on solid elements. The uncalibrated frequencies resulting from latter model are also found to be lower than those obtained from the former one, which could be associated with the shear/rotary inertia effects present in the SOLID187 element.

Copyright © 2014 by ASME



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