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针对某A1A-A1A轴式内燃动车组,采用多刚体系统动力学软件SIMPACK建立了该动车动力学模型,仿真分析动车动态通过R300 m曲线时的动力学性能,并与实测试验结果进行对比分析。结果表明:动车动力学性能同时受轨道局部不平顺和随机不平顺的影响,随机不平顺的影响占60%;实际线路缓圆点位置随机不平顺比圆曲线上随机不平顺大;实际中R300 m曲线横向不平顺在缓圆点处接近较差线路横向不平顺,圆曲线上略大于AAR5级线路横向不平顺;垂向不平顺在缓圆点处接近AAR5级线路垂向不平顺,圆曲线上接近AAR6级垂向不平顺;脱轨系数实测最大值约为较差线路最大值的1.2倍,平均最大值约为较差线路最大值的1.1倍。建议在今后的小半径曲线仿真分析中考虑不平顺的差异。
For a certain type of A1A-A1A diesel internal combustion engine unit, the kinematic model of the car was established by multi-body system dynamics software SIMPACK. The kinetic performance of the car when it dynamically passed the R300 m curve was simulated and compared with the measured results. The results show that the dynamic performance of the motor car is affected by the local irregularities and random irregularities of the track at the same time, and the influence of the random irregularities is 60%. The random irregularities of the actual circular cots are more irregular than those on the circular curve. In practice, R300 m curve is not smooth at the slow round point near the poor line horizontal irregularity, the circular curve slightly larger than the AAR5 line horizontal irregularity; vertical irregular smooth circle at the point near AAR5 level vertical irregular, circular curve Which is close to AAR6 vertical irregularity. The maximum measured derailment coefficient is about 1.2 times the maximum value of the worst line, and the average maximum value is about 1.1 times of the maximum value of the worst line. It is suggested to consider the unevenness in the future simulation of small radius curve.