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建立了考虑线路弹性并视转向架构架为柔体的三节车辆组成的列车通过道岔运行的列车／线路模型．分析了列车通过道岔时作用于转向架构架上的动载荷,将动载荷通过程序FEMBS-1转化为适用于FE程序的文件并由ANSYS软件分析整个构架的应力分布及最大应力时间历程变化等．分析对比了列车及单节车辆的仿真结果并与线路动应力试验结果进行了对比．研究认为列车通过道岔时各构架的拉、压动应力幅值变化各异且在岔心处大于单辆车的相应值,表明单辆车模型适用于初步的计算分析,欲详细分析构架的结构性能应采用多车模型．根据动应力频谱分析可知,构架的动应力可分为3个频域区,分别对应由直线驶入道岔的曲线上、岔心和岔尖处及构架固有振动频率附近的弹性振动区．
A train / train model was established to train trains running through turnouts, which consisted of three vehicles with flexibility of line and steering frame as flexible body. The dynamic load acting on the bogie frame when the train passes the turnout is analyzed. The dynamic load is converted into a file suitable for the FE program through the program FEMBS-1 and the stress distribution and the maximum stress time history of the entire framework are analyzed by the ANSYS software. The simulation results of train and single-vehicle are analyzed and compared with those of dynamic stress test. The results show that the amplitude of tensile and compressive stress changes of each frame when the train passes through the turnout is greater than the corresponding value of the single car at the fork center, indicating that the single car model is suitable for preliminary calculation and analysis. In order to analyze the structure of the frame in detail, Performance should be multi-car model. According to the dynamic stress spectrum analysis, the dynamic stress of the frame can be divided into three frequency domain, which correspond to the elastic vibration zone around the curve of the straight-line turnout, the center of the fork and the fork, and the natural frequency of the frame.