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Effective Simulation of Ballscrew Drives Modeled Using Finite Element Methods

[+] Author Affiliations
Chinedum E. Okwudire, Yusuf Altintas

University of British Columbia, Vancouver, BC

Paper No. IMECE2008-66253, pp. 11-20; 10 pages
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 14: New Developments in Simulation Methods and Software for Engineering Applications
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4875-3 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME


This paper presents a realistic and fast method of simulating ballscrew drives, taking into account the position-dependent changes in dynamics as the nut moves along the ballscrew. It achieves this by first using a strategy whereby the motion of the nut along the ballscrew is accurately and smoothly captured in simulations using the shape function of the finite element model as an interpolating function. Secondly, it applies a method based on Component Mode Synthesis with Modal Acceleration Recovery to achieve a full reduction of the ballscrew while still allowing the nut to move from node to node on the ballscrew. As a result the computational efficiency of the model is improved significantly without any considerable sacrifice of its accuracy.

Copyright © 2008 by ASME



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