Study on Formation Mechanism and Influence Law of Continuous Multi-wave Irregularity in Track Alignment
Compared with ordinary track irregularity,continuous multi-wave irregularity in track alignment is more likely to affect the running safety of high-speed railway.The lack of research on the formation mechanism of multi wave irregu-larity causes a lack of corresponding remediation measures,which results in track replacement for some newly-built lines.Through the vehicle-track coupling dynamic model with multi-wave irregularity in track alignment and the discrete element model of deformation evolution of ballast bed under the coupling action of wheel-rail and temperature force,this paper systematically revealed the formation mechanism of multi-wave irregularity and its influence on train operating dy-namic characteristics,concluding that the additional wheel-rail force and the horizontal component of temperature cou-pling force of seamless track are the main causes of multi-wave irregularity.The results can provide theoretical support for the safe service of high-speed railway track structure in China.
train operating dynamic characteristicsdiscrete element methodseamless trackballast track bed
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