レール小返りおよび軌道のロール振動を考慮した鉄道車両の地震時走行シミュレーション

抄録

In the analytical model of the VDS (Vehicle Dynamics Simulator) developed by RTRI, the rails just under the wheels are laterally and vertically supported by springs and dampers connected to a road bed so that they have two degrees of freedom independently of each other. While the lateral supporting stiffness is mainly corresponding to rail tilting resistance, the angle of the rail tilting has been ignored and the rails have been considered to be able to move horizontally and vertically independently. In addition, the roll vibration of track is described by vertically moved left and right rails. In this study, therefore, new wheel / rail contact model, considering rail tilting angle due to lateral force and roll vibration of track, is adopted to the VDS. The effects of the rail tilting angle on the results of running safety during an earthquake have been investigated. As a result, it has been found out that by taking the rail tilting angle into consideration, running safety limits are changed within several percents. The proposed model can be used for calculation requiring high accuracy such as derivation study on a cause of a real derailment accident.