High-speed train wheel set damage identification test bed based on wheel vibration acceleration response

Abstract

The invention discloses a high-speed train wheel set damage identification test bed based on wheel vibration acceleration response. The test bed comprises a proportional bogie, a proportional train body, a proportional rail, a power loading and control system, a data acquisition system and a signal processing and analysis system, wherein the proportional train body is connected with the wheel setthrough the proportional bogie, the proportional bogie comprises an axle box, a framework, a primary spring, a transmission and a motor, the motor drives the transmission connected with the axle to provide traction force for wheel set movement, and the axle is connected with the wheel set and is hollow; the power loading and control system comprises a vertical vibration exciter, and the vertical vibration exciter acts on the lower portion of the proportional rail; the data acquisition system comprises sensors, and the sensors include a stress-strain gauge, a displacement sensor and an acceleration sensor. Experimental studies such as vibration response stress-strain test, wheel-rail force load identification, vehicle traction control, wheel noise reduction performance optimization and thelike can be carried out at the same time, and damage caused by abrasion, scratch and the like of the wheel set, especially the axle, can be accurately detected.

Description

technical field [0001] The invention relates to the field of transportation equipment, in particular to a wheel set damage identification test bed based on wheel vibration acceleration response. Background technique [0002] High-speed trains are an important direction for the development of high-tech and new technologies in our country. How to improve the speed and safety of trains is the unremitting pursuit of our train personnel. However, the axle runs under high-cycle and high-strength conditions. Under the action of torsion, tension and compression, the material is prone to fatigue cracks and the cracks are hidden. When the size of the crack develops to a certain length, if the axle is not repaired in time If the detection is carried out, there may be an accident of tangential fracture, which will bring a great threat to the personal and property safety of passengers, cause great economic losses and bring adverse social impacts to the country. Therefore, it is necessar...

AI Technical Summary

Problems solved by technology

Although the static load test method is simple and practical to evaluate the fatigue strength, the traditional static stress-strain test may not be feasible and accurate for the identification of the axle state, and cannot complete the damage identification and load identification requirements.

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