In the framework of vehicle-track interaction, this work puts an emphasis on clarifying the influence of sleeper finite element types on system dynamic responses. Three sleeper element types, namely the rigid-body, extensible Euler-Bernoulli beam and solid element are used respectively in the track system modelling with detail mathematical formulations presented. The rails are modelled as Timoshenko beams. The ballasted track system is subject to a moving vehicle with coupled wheel-rail interactions. From aspects of both frequency- and time- domain analysis in the numerical study, the effectiveness of this model has been validated. The influences of the sleeper finite element type, the sleeper support stiffness and damping coefficient on the system responses have been investigated.

在车轨交互框架下，本工作重点阐明轨枕有限元类型对系统动态响应的影响。轨道系统建模中分别使用了刚体单元、可扩展欧拉-伯努利梁单元和实体单元三种轨枕单元类型，并给出了详细的数学公式。轨道被建模为 Timoshenko 梁。有碴轨道系统受到具有耦合轮轨相互作用的移动车辆的影响。从数值研究中的频域和时域分析两个方面验证了该模型的有效性。研究了轨枕有限元类型、轨枕支撑刚度和阻尼系数对系统响应的影响。