Based on the theory of system engineering, taking the seat system and traditional railway vehicle system as a whole system, a vertical dynamic model of bogie-body-seat coupling system for railway vehicle was established, and the vibration differential equation model was deduced; according to the vertical vibration differential equation group of bogie-body-seat coupling system, through variable transformation, a numerical analysis method of bogie-body-seat coupling system vertical dynamic model of railway vehicle was built. By comparing with the vertical random response of traditional railway vehicle vertical model, the vertical dynamic model of the bogie-body-seat coupling system was verified. This research provides an effective reference model for the vehicle vibration characteristics analysis, and for the design of vehicle suspension parameter system and seat suspension system parameter system.%应用系统工程的方法,将座椅系统与传统轨道客车系统作为一个整体大系统加以考察,建立轨道客车转向架-车体-座椅耦合系统垂向动力学模型,并推导模型的振动微分方程;根据转向架-车体-座椅耦合系统垂向振动微分方程组,通过变量变换,给出轨道客车转向架-车体-座椅系统垂向动力学模型的数值分析方法.通过与传统轨道客车垂向动力学模型得到的垂向随机响应进行对比,验证轨道客车转向架-车体-座椅耦合系统垂向动力学模型的正确性,该研究为轨道客车的振动特性分析及车辆悬挂系统参数和座椅悬置系统参数的优化设计提供了模型参考.
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