Integration of car-body flexibility into train-track coupling system dynamics analysis
Integration of car-body flexibility into train-track coupling system dynamics analysis
复制标题
将车体灵活性集成到列车轨道耦合系统动力学分析中
DOI：
10.1080/00423114.2017.1391397
复制
发表时间：
2018
影响因子：
3.6
通讯作者：
Jin Xuesong
中科院分区：
文献类型：
--
作者：
Ling Liang;Zhang Qing;Xiao Xinbiao;Wen Zefeng;Jin Xuesong
柔性车体的共振对高速列车的动力学性能影响很大。基于柔性多体动力学方法，建立了高速列车车厢柔性振动的三维列车轨道模型。采用有限元法和多体动力学方法对柔性车体进行建模，其中刚体运动采用多体动力学理论，结构变形采用有限元法和模态叠加法计算。应用该模型研究了车体柔性振动对列车-轨道系统动力学性能的影响。对采用刚性车体和柔性车体数值模型计算的高速列车在板式轨道上运行的动力学性能，包括车体振动特性、平顺性和运行安全性进行了详细的比较。结果表明，车体柔性不仅对车辆的振动特性和乘坐舒适性有显著影响，而且对列车的运行安全性也有重要影响。刚性车体模型低估了车辆的振动水平和乘坐舒适性，在列车曲线通过安全性评价中忽略车厢扭转柔度是保守的。
The resonance vibration of flexible car-bodies greatly affects the dynamics performances of high-speed trains. In this paper, we report a three-dimensional train–track model to capture the flexible vibration features of high-speed train carriages based on the flexible multi-body dynamics approach. The flexible car-body is modelled using both the finite element method (FEM) and the multi-body dynamics (MBD) approach, in which the rigid motions are obtained by using the MBD theory and the structure deformation is calculated by the FEM and the modal superposition method. The proposed model is applied to investigate the influence of the flexible vibration of car-bodies on the dynamics performances of train–track systems. The dynamics performances of a high-speed train running on a slab track, including the car-body vibration behaviour, the ride comfort, and the running safety, calculated by the numerical models with rigid and flexible car-bodies are compared in detail. The results show that the car-body flexibility not only significantly affects the vibration behaviour and ride comfort of rail carriages, but also can has an important influence on the running safety of trains. The rigid car-body model underestimates the vibration level and ride comfort of rail vehicles, and ignoring carriage torsional flexibility in the curving safety evaluation of trains is conservative.