Impact oscillations with multiple modes between a pantograph and an overhead rigid conductor line in a railway current collection system

Kiyotaka Yamashita, Kotaro Kitajo, Shou Wada, Toshihiko Sugiura, Hiroshi Yabuno

Research output: Contribution to journalArticle

4 Citations (Scopus)


A theoretical and experimental investigation was conducted into impact oscillations between a pantograph and an overhead rigid conductor line in a railway current system. The contact problem was modeled as impact oscillations of an intermediate spring-supported beam excited by an oscillating plate. First, the impact oscillations of a beam with a sinusoidal vibrating plate were theoretically examined. The impact relations are derived considering the effects of multiple vibration modes. Using some of the concepts behind periodic oscillations, qualitatively distinct impact oscillations of the beam with multiple modes are clarified. The interactions between the lowest two modes during the impacts are also discussed. Moreover, we conducted an experiment using a similar model based on the analytical model. Qualitative agreement was demonstrated between the experimental and theoretical results. Some experimental results reveal specific impact oscillations which correspond to the theoretical results considering the interactions between the lowest two vibration modes.

Original languageEnglish
Pages (from-to)499-508
Number of pages10
JournalJVC/Journal of Vibration and Control
Issue number4
Publication statusPublished - 2012 Apr 1



  • Impact problem
  • bifurcation
  • mapping
  • nonlinear dynamics

ASJC Scopus subject areas

  • Automotive Engineering
  • Materials Science(all)
  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

Cite this