Study on the Dynamics Behaviour and MBS Modeling Method of a Subway Track Detecting Vehicle

A subway track detecting vehicle, whose trail bogie is equipped with a detector frame is studied in this paper. The hinged detector frame brings a super constraint problem which leads the integration difficulty of the Multibody System (MBS) model. The solution is to substitute a flexible body for the rigid detector frame. An equivalent model, in which the bushing force is used as the substitution of the hinge joint, is also obtained. A stiffness value of 3 MN/m is recommended to model the bushing force. With the dynamics analysis and the results comparison, the influence of the detector frame, which is totally unsprung mass, on the vehicle’s dynamics behaviour is studied. Besides, the hinge joint of an iron structure can be generally simplified as a bushing force with 3 MN/m stiffness and the accuracy of the equivalent model with the bushing force is quite good.


  • English

Media Info

  • Media Type: Web
  • Pagination: pp 705-715
  • Monograph Title: ICRT 2017: Railway Development, Operations, and Maintenance

Subject/Index Terms

Filing Info

  • Accession Number: 01866262
  • Record Type: Publication
  • ISBN: 9780784481257
  • Files: TRIS, ASCE
  • Created Date: Nov 30 2022 4:37PM