Abstract
When railway vehicles pass through a sharp curve, yaw moment is generated at the bogie. This condition affects the increase of the lateral force of the outside wheel of the front axle of the leading bogie, which is important factor for assessing the running safety of railway vehicles. A Lateral-force/Wheel-load estimation equation has been developed as a method to calculate the lateral force and the wheel load during the curve passage of railway vehicles taking into account the yaw moment of the bogie. This equation is useful to estimate the risk of flange-climb derailment. The authors have newly suggested a more versatile Lateral-force/Wheel-load estimation equation with a focus on the improvement of the estimation of yaw moment of the bogie. Running tests using test track which has sharp curves were carried out to measure the generated forces of several components of the bogie, which are the sources of the yaw moment of the bogie. New equations were produced based on the test results, and compared with the measured lateral forces and wheel loads.
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