Study of Railway Freight Vehicle Body's Dynamic Model Based on Goods Loading Technical Standards

Abstract The gravity center position of the loaded car-body is always constant during the dynamic analysis currently. To enhance vehicle dynamic analysis for goods transportation, multi-body system dynamics and vehicle-track coupling dynamics are the basic theories for the study. The car-body which includes goods model is called loaded car-body, and its gravity center calculation formulas are put forward based on Chinas railway goods loading technical standards. After that, the vertical, lateral, rolling, pitching and yawing vibration modes dynamic equations are established for loaded car-body. The C70 open top vehicle is an example for the calculation of different height of gravity center of loaded vehicle, and the railway line condition is grade in China. The derailment coefficient and wheel unloading rate peak value under the loading and running conditions are all going up with the height rising of gravity center of loaded vehicle. This paper gives a feasible method for the further study on vehicle dynamic characteristics in railway goods transportation.