To improve the integration of active radial systems of railway vehicles and their adaptability to the vehicle structure, this paper proposes an active radial actuation system based on flexible elastomers. The execution unit of the system has a compact layout and can be embedded in an axle box. The core functional component is a flexible elastic oil-filled rubber bladder, which has active radial actuating capabilities and provides primary longitudinal suspension stiffness. To clarify these aspects of the execution unit, the typical physical properties of the rubber bladder are analysed using a fluid-structure-interaction finite element analysis method. The resulting calculation data are used to formulate the response characteristic equation of the execution unit. This equation is used to establish a simulation model of the actuation system, and the response characteristics of the proposed actuation system and traditional hydraulic cylinder are analysed and compared. The results show that the proposed system exhibits better following performance. Subsequently, the SIMPACK-SIMULINK co-simulation results indicate that the system can realize an effective primary longitudinal suspension; further, in the active radial mode, the performance indexes of vehicle curve passing are significantly improved. These findings provide a reference for the engineering implementation of active radial technology.

为提高轨道车辆主动径向系统的集成度及其对车辆结构的适应性，提出一种基于柔性弹性体的主动径向驱动系统。系统执行单元布局紧凑，可嵌入轴箱内。核心功能部件是一个灵活的弹性充油橡胶气囊，它具有主动径向驱动能力并提供主要的纵向悬架刚度。为了阐明执行单元的这些方面，使用流固耦合有限元分析方法分析了橡胶囊的典型物理特性。得到的计算数据用于制定执行单元的响应特性方程。该方程用于建立驱动系统的仿真模型，并对所提出的驱动系统与传统液压缸的响应特性进行了分析和比较。结果表明，所提出的系统表现出更好的跟随性能。随后，SIMPACK-SIMULINK联合仿真结果表明，该系统可以实现有效的初级纵向悬挂；此外，在主动径向模式下，车辆弯道通过性能指标显着提高。这些研究结果为主动径向技术的工程实施提供了参考。SIMPACK-SIMULINK联合仿真结果表明，该系统可以实现有效的初级纵向悬挂；此外，在主动径向模式下，车辆弯道通过性能指标显着提高。这些研究结果为主动径向技术的工程实施提供了参考。SIMPACK-SIMULINK联合仿真结果表明，该系统可以实现有效的初级纵向悬挂；此外，在主动径向模式下，车辆弯道通过性能指标显着提高。这些研究结果为主动径向技术的工程实施提供了参考。