The high-speed freight trains are increasingly using containers for efficient cargo handling and improved transportation economy. The dynamic interactions of the containers with the vehicle can cause greater vehicle vibration, especially at speeds as high as 350 km/h. This study investigates the vibration response of a high-speed freight car (electric motor unit, EMU) through development and analysis of a coupled container-vehicle multibody dynamics (MBD) model in the SIMPACK platform. The flexible carbody is established in the ANSYS software. An integrated MBD model which ignore the viscoelastic coupling between the containers and the carbody and a MBD model of the vehicle without the containers are established as the reference models. The viscoelastic parameters study of the cargo mounting system and the vertical vibration responses of the carbody, containers and the bogies under different operating speeds and different container loads are analysed. The simulation results are discussed to provide design guidance for the containers’ mounts. The results suggested that the vertical vibration response of the coupled system is strongly affected by the viscoelastic properties of the mounting system. Stiffer container mounts revealed dominant vibration responses of the containers in the vicinity of the modal frequencies of the carbody.

高速货运列车越来越多地使用集装箱来进行高效的货物装卸和提高运输经济性。集装箱与车辆的动态相互作用会导致更大的车辆振动，尤其是在速度高达 350 公里/小时的情况下。本研究通过在 SIMPACK 平台中开发和分析耦合的集装箱-车辆多体动力学 (MBD) 模型，研究高速货车（电动机单元，EMU）的振动响应。在 ANSYS 软件中建立柔性车身。建立了忽略集装箱与车身之间粘弹性耦合的集成MBD模型和没有集装箱的车辆MBD模型作为参考模型。分析了货物悬挂系统的粘弹性参数研究以及不同运行速度和不同集装箱载荷下车体、集装箱和转向架的垂直振动响应。讨论模拟结果，为集装箱的安装提供设计指导。结果表明，耦合系统的垂直振动响应受到安装系统粘弹性特性的强烈影响。较硬的集装箱支架揭示了集装箱在车身模态频率附近的主要振动响应。结果表明，耦合系统的垂直振动响应受到安装系统粘弹性特性的强烈影响。较硬的集装箱支架揭示了集装箱在车身模态频率附近的主要振动响应。结果表明，耦合系统的垂直振动响应受到安装系统粘弹性特性的强烈影响。较硬的集装箱支架揭示了集装箱在车身模态频率附近的主要振动响应。