基于实测踏面廓形的车辆振动特性研究
Research on Vehicle Vibration Characteristics Based on Measured Wheel Tread Profile

为了研究不同踏面廓形对车辆动力学的影响，跟踪测试了车轮在不同运行里程下的踏面廓形，并对其等效锥度进行了分析。结合动力学仿真模型，将实测踏面廓形导入仿真模型中进行计算。结果显示，在一定范围的等效锥度变化对平稳性存在明显的影响，但达到一定的限度值后，踏面的接触位置靠近根部，对平稳性指标的影响不大。此外，一定范围内等效锥度的变化对轮轨力以及脱轨系数等安全性指标影响较小。
In order to study the influence of different wheel profile on vehicle dynamics, the wheelt read profiles were tested with different in vehicle running mileage, and the equivalent conicity of wheel was analyzed. Combined with the dynamic simulation model, the measured wheel profile is introduced into the simulation model for calculation. The results show that the change of the equivalent conicity has an obvious influence on the stability index in a certain range, the contact position of the tread is close to the root of wheel, which has little effect on the stability index. In addition, the change of equivalent conicity has little effect on the safety indexes such as wheel-rail force and derailment coefficient.