Test bench for recognizing damages of axle of high-speed train based on vibration response

Abstract

The invention discloses a test bench for recognizing the damages of an axle of a high-speed train based on vibration response, and the test bench comprises a loading system, a detection system, support devices, a test platform, and a wheel pair. The loading system comprises two vertical vibration exciters, and the number of support devices is two. The vertical vibration exciters are located between the two support devices, and the detection system comprises a stress and strain sensor, a signal collector, and a data analysis terminal. The signal collector is located on a central rod, and the stress and strain sensor is in wireless connection with the signal collector. The signal collector is connected with the data analysis terminal, and the stress and strain sensor is pasted on an inner wall of a to-be-tested hollow axle. Two ends of the central rod are respectively connected with the two support devices, and the support devices and the vertical vibration exciters are installed on thetesting platform, and the wheel pair comprises two wheels adapted to the to-be-tested hollow axle. The two wheels are located exactly above the two vertical vibration exciters. The test bench can simulate the stress and strain and damage recognition research of the high-speed train under the actual working condition.

Description

technical field [0001] The invention relates to the field of rail transportation, in particular to a vibration response-based high-speed train axle damage identification test bench. 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. At present, the monitoring of the working condition of the train axle at home and abroad usually uses the method of attaching strain gauges on the surface of the axle, which not only has a heavy workload but also has a large error. The axle vibration response test bench using new technology equipment is rarely used to simplify related experiments. [0003] my country's "Railway Vehicle Strength Design and Test Appraisal Specification" TB / T 1335-1996 standard specification mentions that the test load should not be less than the basic acting load value, but th...

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Problems solved by technology

[0034] In the above-mentioned specifications, the strength of the axle of the vehicle wheel is evaluated by the experimental results. Although the experimental method is simple and practical to evaluate the fatigue strength, the traditional static stress-strain test may not be able to identify the state of the axle, and cannot complete the damage identification and load identification requirements.

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