Full Content is available to subscribers

Subscribe/Learn More  >

Vibration Analysis for Improving Powertrain Design and Contact Measurements of a Roller Rig

[+] Author Affiliations
Milad Hosseinipour, Sajjad Z. Meymand, Mehdi Ahmadian

Virginia Tech, Blacksburg, VA

Paper No. JRC2015-5622, pp. V001T10A002; 9 pages
  • 2015 Joint Rail Conference
  • 2015 Joint Rail Conference
  • San Jose, California, USA, March 23–26, 2015
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 978-0-7918-5645-1
  • Copyright © 2015 by ASME


This paper provides two vibration analyses on a scaled roller rig that is under construction at the Railway Technologies Laboratory of Virginia Tech (VT) for evaluating wheel/rail contact mechanics. The scaled vertical rig includes a wheel that is placed on a roller with similar profile of a U.S. 136 weight rail. Two independent AC servomotors enable controlling the relative speed of the disks to a high degree of precision. Linear actuators allow for adjusting the simulated load, wheel angle of attack, rail cant, and lateral position of the wheel with respect to the rail, including flanging. Rotation of each disk is dominated by internal dynamics of the motors, gearheads, couplers, and flexible shafts. As a result, dynamics of each component has direct effect on the relative speed of the wheel and the roller at the contact patch. On the other hand, it is essential to make sure that the measurements are only caused by the particular subject of study, and not any intermittent source of disturbance such as unbalanced rotation. Electromechanical models of the rig components have been developed in previous works of the authors for studying the overall behavior of the coupled drivelines. This study aims to fulfill the previous studies by analyzing the effect of incorporating compliant joints in the drivelines, as well as unbalanced dynamics in the disks. Appropriate consideration is given to providing an accurate mathematical model of each phenomenon. The mathematical models are solved numerically to carry out parametric studies that represent actual working conditions of the rig. The results of these studies indicate that incorporation of constant velocity joints in sensitive instruments like the roller rig, leads to inevitable axial vibrations that affect both driver and driven sides. This paper also provides a tool for filtering the undesired vibrations from the contact measurements due to unbalanced rotation or other sources of the same nature.

Copyright © 2015 by ASME



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In