Chinese Journal of Theoretical and Applied Mechani ›› 2008, Vol. 40 ›› Issue (3): 381-387.DOI: 10.6052/0459-1879-2008-3-2007-428

• Research paper • Previous Articles     Next Articles

Random vibration analysis of vehicle-track coupling systems using symplectic method

Feng Lv Jiahao Lin Yahui Zhang   

  1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116023, China
  • Received:2007-09-12 Revised:2007-12-26 Online:2008-05-25 Published:1900-01-01

Abstract: The vertical coupling model of vehicle-track systems is set up in the case of the track as an infinite periodic structure. The random irregularity excitation of the rail is transformed into a deterministic harmonic excitation with the pseudo excitation method, and the frequency response of the track and the power spectrum density (PSD) of the system response are analyzed using the symplectic algorithm. In addition, there are only 26 DOFs in the computational model to have an efficient and accurate solution. The model is verified with the conventional FEM, and the influence of the vehicle velocity on the system vibration is investigated.

Key words: vehicle, track, random vibration, pseudo-excitation, symplectic