为研究悬挂多设备对高速列车舒适度指标影响规律，建立车体-设备的27自由度的刚柔耦合数学模型，获得车体及车下设备悬挂系统的加速度频率响应函数表达式，结合德国垂向不平顺轨道谱和舒适度滤波函数计算车体参考点的舒适度指标。分别研究有无设备、不同悬挂频率、不同悬挂位置对车辆垂向舒适度指标的影响规律。研究结果表明：合理设计车下设备悬挂参数不仅能降低车体中部舒适度指标，还能在一定程度改善车体端部乘坐舒适性，尤其是200～300 km/h时车体端部舒适度指标；通过分析最终确定设备1最优悬挂频率为10.2 Hz；双层悬挂系统中框架最优悬挂频率小于8 Hz，设备2最优悬挂频率为11～12 Hz；设备的空间布置也会对舒适度产生影响，设备1悬挂位置对车体中部和端部舒适度影响不大，而双层悬挂系统悬挂于13.5 m位置处时车体中部和端部都能获得较好舒适性。
The 27-freedom degree vehicle-equipment coupling system is established to research the impact of multi hanging equipment on the high speed train vertical ride comfort index, and the acceleration frequency response characteristics in the middle car body and above the bogie are obtained. Also, the Germanic vertical track irregularity spectrum and the ride comfort filtering function are brought into calculating the comfort index at the reference points. The effect of equipment or without equipment, the suspension frequency and the suspension position on the vertical comfort index of the vehicle are studied respectively. The result shows that:Hanging equipment has large influence on the vehicle vertical comfort index not only in the middle car, but also above the bogie car body. The 10.2 Hz is chosen as suitable suspending frequency for equipment 1; less than 8 Hz for the frame in the double isolation system, and 11-12 Hz for the equipment 2. Compared to equipment 1, the suspension position of the double isolation hanging have larger influence on the ride comfort index. When hanging at 13.5 m, the vehicle has better ride experience.
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