Vector form intrinsic finite element method for analysis of train-bridge interaction problems considering the coach-coupler effect

Y. F. Duan, S. M. Wang, J. D. Yau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

32 Citations (Scopus)

Abstract

In this paper, the vector form intrinsic finite element (VFIFE) method is presented for analysis the train-bridge systems considering the coach-coupler effect. The bridge is discretized into a group of mass particles linked by massless beam elements and the multi-body coach with suspension systems is simulated as a set of mass particles connected by parallel spring-dashpot units. Then the equation of motion of each mass particle is solved individually and the internal forces induced by pure deformations in the massless beam elements are calculated by a fictitious reverse motion method, in which the structural stiffness matrices need not be updated or factorized. Though the vector-form equations resulting from the VFIFE method cannot be used to compute the structural frequencies by the eigenvalue approach, this study proposes a numerical free vibration test to identify the bridge frequencies for evaluating the bridge damping. Numerical verifications demonstrate that the present VFIFE method performs as accurately as previous numerical ones. The results show that the couplers play an energy-dissipating role in reducing the car bodies' response due to the bridge-induced resonance, but not in their response due to the train-induced resonance because of the bridge's intense vibration. Meanwhile, a dual-resonance phenomenon in the train-bridge system occurs when the coach-coupler effect is considered in the vehicle model.

Original languageEnglish
Article number1950014
JournalInternational Journal of Structural Stability and Dynamics
Volume19
Issue number2
DOIs
Publication statusPublished - 1 Feb 2019
Externally publishedYes

Keywords

  • Coupler
  • mass particle
  • resonance
  • train-bridge system
  • vector form intrinsic finite element

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering
  • Applied Mathematics

Fingerprint

Dive into the research topics of 'Vector form intrinsic finite element method for analysis of train-bridge interaction problems considering the coach-coupler effect'. Together they form a unique fingerprint.

Cite this