Track lateral shift under high speed vehicle lateral loads is an important phenomenon influencing the safety of the high speed ground transportation systems. In the report, the fundamental mechanics of the track shift phenomenon are presented in detail, identifying the critical conditions for the failure modes originating from the track shift. A comprehensive review of the literature published in France, England, Sweden, Japan and the United States is presented. The track shift criteria practiced in these countries are critically examined. A rational approach for analyzing track shift under vehicle and thermal loads is outlined. Preliminary numerical results on lateral loads are presented using the SYSSIM vehicle dynamic code. A TGV-type vehicle consist is simulated for this purpose. Baseline results on limiting track strength are also presented using a simplified track model. Conclusions of practical interest based on the literature survey conducted are presented. Recommendations for improved vehicle and track models for track shift evaluations are also made.
Safety of High Speed Ground Transportation Systems. Track Lateral Shift: Fundamentals and State-of-the-Art Review
1996
76 pages
Report
Keine Angabe
Englisch
Railroad Transportation , Transportation Safety , High speed ground transportation , Railroad cars , Railroad tracks , Wheel rail interface , Traction , Derailment , Wheel performance , Lateral forces , Failure mode analysis , Mechanical properties , Magnetic levitation vehicles , Automated guideway transit vehicles , Rapid transit systems , Rail transportation , Track lateral shift , Track panel shift , Track shift , Lateral loads