Vertical Coupling Mechanism between the Sitting Human Body and the Vehicle-track System

In order to explore the coupling effect between the vertical vibration of vehicle-track system and the vertical vibration of sitting human body, regarding the human body as a four-degree-of-freedom system attached to the car floor, a vertical coupling dynamic model of the sitting human body-vehicle-track system is established on the basis of considering the elastic vibration of the car body, and the correctness of the model is verified by real vehicle line operation test. Based on this, taking the vehicle-track vertical coupling dynamic model, the sitting human body vertical vibration model, and the vertical coupling dynamic model of the sitting human body-vehicle-track system as reference, the influence of sitting human body vertical vibration on the vehicle-track system vertical random vibration response characteristics, the influence of vertical coupling vibration effect of sitting human body and vehicle-track system on the vertical vibration of sitting human body, and the vibration response characteristics of the sitting human body under vertical coupling action of the sitting human body-vehicle-track system are analyzed. This research provides an effective model reference and theoretical basis for the ride comfort analysis and dynamic performance optimization of rail vehicles.