Study on Derailment Mechanism and Safety Operation Area of High-Speed Trains Under Earthquake

In order to investigate the derailment mechanism and safety operation area of high-speed trains under earthquake, a coupled vehicle-track dynamic model considering earthquake effect is developed, in which the vehicle is modeled as a 35 degrees of freedom (DOF) multibody system with nonlinear suspension characteristic and the slab track is modeled as a discrete elastic support model. The rails of the track are assumed to be Timoshenko beams supported by discrete rail fasteners, and the slabs are modeled with solid finite elements. The system motion equations are solved by means of an explicit integration method in time domain. The present work analyzes in detail the effect of earthquake characteristics on the dynamical behaviors of a vehicle-track coupling system and the transient derailment criteria. The considered derailment criteria include the ratio of the wheel/rail lateral force to the vertical force, the wheel loading reduction, the wheel/rail contact point traces on the wheel tread, and the wheel rise with respect to the rail top, respectively. The present work also finds the safety operation area, the derailment area, and the warning area of high-speed trains under earthquake, and their boundaries. These areas consist of three key parameters influencing the dynamical behavior of high-speed train and track under earthquake. The three key influencing parameters are, respectively, the vehicle speed and the lateral and vertical peak ground acceleration (PGA) of an earthquake. The results obtained indicate that the lateral earthquake motion has a greater influence on the vehicle dynamic behavior and its running safety compared to the vertical earthquake motion. The risk of derailment increases quickly with the increasing of lateral earthquake motion amplitude. The lateral earthquake motion is dominant in the vehicle running safety influenced by an earthquake. While the vertical earthquake motion promotes jumping of the wheels easily, not easy is flange climb derailment. And the effect of the vehicle speed is not significant under earthquake.

[1]  Herbert Weinstock,et al.  Wheel climb derailment criteria for evaluation of rail vehicle safety , 1984 .

[2]  Xuesong Jin,et al.  Rail corrugation formation studied with a full-scale test facility and numerical analysis , 2007 .

[3]  Wanming Zhai,et al.  TWO SIMPLE FAST INTEGRATION METHODS FOR LARGE‐SCALE DYNAMIC PROBLEMS IN ENGINEERING , 1996 .

[4]  J. D. Yau,et al.  Response of suspended beams due to moving loads and vertical seismic ground excitations , 2007 .

[5]  Zefeng Wen,et al.  Numerical simulation of rail corrugation on a curved track , 2005 .

[6]  R. Clough,et al.  Dynamics Of Structures , 1975 .

[7]  Makoto Tanabe,et al.  A Simple and Efficient Numerical Method for Dynamic Interaction Analysis of a High-Speed Train and Railway Structure During an Earthquake , 2008 .

[8]  Xuesong Jin,et al.  Effect of curved track support failure on vehicle derailment , 2008 .

[9]  J. K. Hedrick,et al.  A Comparison of Alternative Creep Force Models for Rail Vehicle Dynamic Analysis , 1983 .

[10]  Klaus Knothe,et al.  Modelling of Railway Track and Vehicle/Track Interaction at High Frequencies , 1993 .

[11]  M Miyamoto.  MECHANISM OF DERAILMENT PHENOMENA OF RAILWAY VEHICLES , 1996 .

[12]  N Matsui.  DYNAMICS OF HIGH-SPEED ROLLING STOCK , 1966 .

[13]  J. Kalker,et al.  On the rolling contact of two elastic bodies in the presence of dry friction , 1967 .

[14]  Yeong-Bin Yang,et al.  DYNAMIC STABILITY OF TRAINS MOVING OVER BRIDGES SHAKEN BY EARTHQUAKES , 2002 .

[15]  Hiroaki Ishida,et al.  RUNNING SAFETY OF RAILWAY VEHICLE AS EARTHQUAKE OCCURS , 1997 .

[16]  Yoshiaki Terumichi,et al.  Development of Vehicle Dynamics Simulation for Safety Analyses of Rail Vehicles on Excited Tracks , 2007 .

[17]  Yan Han,et al.  Dynamic analysis of train–bridge system subjected to non‐uniform seismic excitations , 2006 .

[18]  Masaki Matsuo,et al.  Full-scale Experiment on the Dynamic Behavior of Railway Vehicles against Heavy Track Vibration , 2007 .

[19]  Xiu Luo.  Study on methodology for running safety assessment of trains in seismic design of railway structures , 2005 .

[20]  Xinbiao Xiao,et al.  Effect of tangent track buckle on vehicle derailment , 2011 .

[21]  Jun Yang,et al.  A simple approach to integration of acceleration data for dynamic soil–structure interaction analysis , 2006 .

[22]  Xuesong Jin,et al.  Effect of Disabled Fastening Systems and Ballast on Vehicle Derailment , 2007 .

[23]  Kazuhiko Nagase,et al.  Train Damaged by the Quake in kobe. , 1997 .

[24]  K. Johnson,et al.  Three-Dimensional Elastic Bodies in Rolling Contact , 1990 .

[25]  Jun Xiang,et al.  Theory of random energy analysis for train derailment , 2004 .