Railway Vehicle Gauge Research Based On Primary Suspension Spring Faults

The gauge is the basic guarantee for the safe operation of rail vehicles.If the vehicle fails at high speeds,the instantaneous impact and vibration will increase the dynamic movement of the vehicle,and the expansion of the vehicle gauge may break through the structure gauge,which may not only lead to vehicles derailing and then hitting surrounding buildings,but even cause casualties with more serious consequences.This paper calculates the gauge of a certain type of high-speed vehicle according to "Standard gauge Railway Locomotive and Rolling Stock Gauge " and "Interim Provisions on Locomotive Limits for Passenger Dedicated Line".The specific work is as follows:(1)Perform static clearance analysis on the designed vehicle based on standard vehicle clearance diagram and standard passenger dedicated line vehicle clearance diagram to determine whether the static clearance meets the requirements.Calculate the maximum allowable width of the vehicle based on its size parameters and determine whether reduction is necessary.(2)Establish a dynamic model based on vehicle performance parameters.Calculate the dynamic offset of each control point of normal vehicle and faulty vehicle under no crosswind and crosswind of 10m/s at different speeds separately.Analyze the impact of primary spring failure and vehicle speed and wind speed on dynamic offset.The maximum dynamic limit of normal vehicle and faulty vehicle on a straight line are calculated and compared.(3)Calculate the dynamic offset of each control point with different primary springs failed at a wind speed of 15m/s and driving at different speeds.Analyze the influence of the spring fault location on the dynamic offset of different end faces of the vehicle body and the maximum dynamic limit of the vehicle.The results show that the static limit of the designed vehicle meets requirements.The head width of the motor car does not meet the requirement of the maximum allowable width,so it is reduced.The lateral offset of car body is largest at low speed.Spring crack failure has little effect on the offset of car body,and the fracture fault has a greater impact on the offset of car body.The influence of wind speed on the faulty vehicle is as follows: When the wind speed is lower than 15m/s,the maximum dynamic limit of the faulty vehicle does not exceed the structure gauge.When the wind speed is 17m/s,the dynamic limit of the faulty vehicle exceeds the edge of the platform.When the wind speed is greater than 19m/s,the faulty vehicle may derail.