Random simulation of artificial hunting wave of bogie frame of high-speed train running on the Qing-shen passenger railway line
WANG Yuan~1,XIANG Jun~2(1. Central South Forestry Institute,Changsha 410004, China; 2. School of Civil Engineering and Architecture, Central South University, Changsha 410075, China)
The transverse track irregularity is mostly treated as the exciting source of transverse vibration of train-bridge (or track) time-varying system at home and abroad. In fact, transverse vibration of the system may be caused by many factors, such as the transverse track irregularity, the conicity of wheel tread, defects of wheels and rails, errors in production of wheels and rails, the eccentricity of the mass and loading of cars and so on. Sole consideration of the track irregularity results in negligence of many other factors unable to be included in the track irregularity. On the contrary, the hunting wave of car bogie frame covers the influence of all factors causing transverse vibration of the system and reflects the action of different wheel-rail contact conditions. In this paper, the artificial hunting wave of bogie frame of high-speed train was simulated at random at the range of speed 160～300 km/h by making use of trigonometric series model and Monte-Carlo method, and on the basis of field-testing results of the hunting wave of bogie frame of high-speed train running on the Qing-shen passenger railway line. The exciting source for random transverse vibration analysis of high-speed train and bridge (track) time-variant system is confirmed. Some typical field-test time-history curves of hunting wave of bogie frame of high-speed train are listed at the end of this paper.