Method for identifying rail corrugation damage based on vehicle body acceleration

Abstract

The invention discloses a method for identifying a rail corrugation damage based on a vehicle body acceleration. The method comprises the following steps of (S1) obtaining vehicle body vibration acceleration data in a train running process; (S2) obtaining vehicle body vibration acceleration data between two adjacent stations; (S3) obtaining a main frequency of vehicle body vibration; (S4) obtaining a peak frequency in rail corrugation according to the main frequency of vehicle body vibration; (S5) obtaining speed information and mileage information of a train; and (S6) obtaining a corrugationwavelength according to the speed information of the train and the peak frequency in rail corrugation, obtaining the specific position according to the mileage information and completing identification of the rail corrugation damage. According to the method, carriage floor vibration is measured based on an acceleration sensor, and the rail corrugation can be economically, conveniently, quickly andaccurately diagnosed according to the running speed and the mileage information of the train, thereby providing an important data support for a subway operation company for developing a scientific and efficient maintenance strategy.

Description

technical field [0001] The invention relates to the field of urban rail transit, in particular to a method for identifying rail corrugation defects based on vehicle body acceleration. Background technique [0002] Rail corrugation wear (referred to as rail corrugation) refers to the uneven wear similar to waves on the rail contact surface after the rail is laid and used. Due to the characteristics of many small-radius curves, short distance between stations, and frequent starting and braking of subway lines, rail corrugation is common and mainly occurs in circular curves and transitional curves. When the vehicle passes through the rail corrugation section, the rail corrugation will significantly increase the wheel-rail interaction force and the vibration amplitude of key components of the bogie, which will deteriorate the working environment of the vehicle and track components. At the same time, accompanied by wheel-rail noise, it will affect the riding of subway vehicles C...

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Problems solved by technology

[0004] (1) Hand-push type: based on the acceleration integral method and the chord measurement method, but the realization principle is complicated, the processing precision is high, and the purchase and maintenance costs are high, such as the CAT wave mill measurement trolley (the imported single equipment is about 800,000 yuan)

[0005] (2) Vehicle-mounted: Diagnosis of rail corrugation based on the time-frequency analysis of vehicle axlebox acceleration requires the acceleration sensor to be placed at the position of the axlebox of the operating vehicle. The working environment is harsh, and a large amount of cost needs to be invested in daily maintenance to ensure the safety of vehicle operation. Full coverage installation on existing operating vehicles, and the cost is huge

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