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At present, there are many cases of lateral vibration acceleration exceeding the limit when a high-speed vehicle passes the large-size turnout in the diverging route, which affects the smoothness of vehicle operation and the comfort of passengers.Therefore, this paper proposes a vehicle-turnout coupled dynamic model considering both rigid and flexible characteristics.By utilizing orthogonal experiments and the Plackett-Burman saturated fractional factorial design method, the lateral vibration acceleration of the vehicle body and the Sperling lateral stability index are selected as the observed variables.Employing the graphical analysis method, significant influential factors affecting the vehicle operational stability of high-speed vehicle passes large-size turnout in the diverging route are identified.The results show that: 1) The driving speed has a pronounced influence on various aspects, including lateral wheel-rail forces, bogie vibration acceleration, lateral vibration acceleration of the vehicle body, and the lateral Sperling stability index; 2) The wheel profile exerts a significant impact on the lateral wheel-rail forces and the lateral vibration acceleration of the bogie.However, its influence on the lateral vibration acceleration of the vehicle body and the lateral Sperling stability index is relatively negligible; 3) The influence of rail profile on frame transverse vibration acceleration and body transverse vibration acceleration is more obvious.Under the rail abrasion condition, the frame transverse vibration acceleration increased by 69.36% compared with the standard profile, and the maximum value of body transverse vibration acceleration increased by 31.87%compared with the standard profile.
Li et al. (Tue,) studied this question.