Study on Lateral Vibration Offsets of freight cars Under the Condition of Shift of Center of freight Gravity on the Curve Track

摘要

the vehicle maximum lateral vibration offset is one of the premises for judging the feasibility of out-of-gauge freights transport. Dynamics simulation models of single-vehicle NX_(70H) flat were established by SIMPACK with American fifth track spectrum being the excitation, in order to discuss the change rules of the roll angles, the yaw angles, the lateral offsets and the maximum lateral vibration offsets when the vehicle running on Chinese I grade railway lines at the speed of 20～120km/h under the condition of lateral shift of center of freight gravity. Simulation results show that the running speed, the line condition and shift of center of freight gravity all have a significant impact on the roll angles and the maximum lateral vibration offset, and the yaw angles, the lateral offsets always keep the steady values, and the maximum lateral vibration offsets maximize at the end of vehicle.