Method and device for judging movement stability of railway vehicle bogie

Abstract

The invention discloses a method and a device for judging movement stability of a railway vehicle bogie, and relates to the technical field of railway vehicles. Through cooperation of steps, in a line operation state, difficulty in recognizing snake movement vibration modal of the railway vehicle bogie is overcome, and long-term evolution trend of a railway vehicle can be acquired to determine allowance of movement stability of the railway vehicle. By the method and the device, interference, of line excitation factors like line irregularity, on recognition of snake movement modal damping ratio of the bogie can be effectively excluded, and interference, of influencing factors like elastic vibration of mounting parts and rotation excitation of rotating parts like a motor and a wheel pair on the bogie, on recognition of the snake movement modal damping ratio of the bogie can be effectively excluded.

Description

technical field [0001] The invention relates to the technical field of railway vehicles, in particular to a method and device for judging the motion stability of a railway vehicle bogie. Background technique [0002] The bogie, also known as the trolley, is one of the most important parts of the railway vehicle. It directly bears the self-weight and load of the vehicle body, guides the vehicle to run along the railway track, ensures that the vehicle passes the curve smoothly, and has the function of slowing down the vehicle when it is running. Therefore, the design of the bogie also directly determines the stability of the vehicle and the comfort of the vehicle. The bogie frame is the skeleton of the bogie, and other components of the bogie are mounted on the frame to form a bogie and transmit forces in all directions. [0003] In the practical application of railway vehicles, the existing dynamic stability judgment criteria are as follows: "When the acceleration of the bog...

AI Technical Summary

Problems solved by technology

However, during the operation of the line, the peak value of the lateral acceleration of the bogie and the number of peak occurrences are significantly affected by the line disturbance, including the disturbance of the line irregularity and the interference of the suspension components (such as motors, gearboxes, etc.) on the bogie

Therefore, only through the peak or continuous times of the bogie frame, it is impossible to effectively obtain the long-term evolution trend of the bogie kinematic stability and the margin for determining the bogie stability as the operating mileage increases

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