1. Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles, Beijing University of Civil Engineering and Architecture, Beijing, China
2. Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing, P. R. China
3. School of Mechanical Engineering, Beijing Institute of Technology, Beijing, P. R. China
4. Department of Mechanics, Inner Mongolia University of Technology, Hohhot, P. R. China