Test-bed for high-speed train axle damage identification based on vibration response

Abstract

The invention discloses a test bench for axle damage identification of high-speed trains based on vibration response, which includes a loading system, a detection system, a support device, a test platform and a wheel set. The loading system includes a vertical vibration exciter, and there are six types of support devices. The first The supporting device and the second supporting device are installed on the third supporting device, the guide rail and the fifth supporting device are connected by bolts, the fifth supporting device and the vibrator are installed on the sixth supporting device, the third supporting device and the fourth supporting device , The guide rail is installed on the test platform. The detection system includes stress and strain sensors, signal collectors and data analysis terminals. The signal collector is located on the center pole. The stress and strain sensors are wirelessly connected to the signal collector, and the signal collector is connected to the data analysis terminal. The stress and strain sensor is used to mount on the inner wall of the hollow axle to be tested. The invention can simulate stress-strain and damage identification research of the high-speed train axle under actual working conditions.

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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