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Abnormal vibration monitoring method and device for vehicle body

A technology of vibration monitoring and car body, applied in the field of rail vehicles, can solve the problems of insufficient sensitivity of shaking cars and inability to effectively identify them, and achieve the effect of improving recognition accuracy

Active Publication Date: 2021-05-25
CHINA ACADEMY OF RAILWAY SCI CORP LTD +3
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  • Application Information

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Problems solved by technology

In the prior art, it is possible to monitor the lateral stability index of the vehicle body by installing a vehicle-mounted stability monitoring device. The stability index is the result of weighted calculation of different vibration frequency components of the vehicle body. The monitoring results can reflect the shaking of the vehicle body to a certain extent, but Sensitivity to shaking cars is not enough to effectively identify

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  • Abnormal vibration monitoring method and device for vehicle body
  • Abnormal vibration monitoring method and device for vehicle body
  • Abnormal vibration monitoring method and device for vehicle body

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Embodiment Construction

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0037] In order to facilitate the understanding of the technical solution provided by the present application, the relevant content of the technical solution of the present application will be described below first.

[0038] figure 1 It is a structural schematic diagram of the vehicle body vibration abnormal state monitoring system provided by the first embodiment of the present invention, as ...

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Abstract

The invention provides an abnormal vibration monitoring method and device for a vehicle body.The method comprises the following steps of: acquiring vibration response of the vehicle body; according to the vibration response of the vehicle body, calculating to obtain modal participation factors of each order of vibration modes of previous preset orders of vibration modes; acquiring a vibration mode corresponding to the maximum modal participation factor in the modal participation factors as a main vibration mode; performing calculation according to the vibration response of the vehicle body to obtain modal parameters of the main vibration mode which comprise a modal frequency and a modal damping ratio; judging whether the vehicle body has abnormal vibration or not according to the modal frequency; and according to the modal damping ratio, carrying out quantitative grading alarm on the severity of the abnormal vibration. The device is used for executing the method. According to the abnormal vibration monitoring method and device for the vehicle body, the abnormal vibration of the vehicle body can be effectively recognized, and the recognition precision of the abnormal vibration of the vehicle body is improved.

Description

technical field [0001] The invention relates to the technical field of rail vehicles, in particular to a method and device for monitoring abnormal vibration of a car body. Background technique [0002] As the speed of high-speed trains increases, the dynamic interaction between the wheels and rails continues to intensify. When the wheel-rail matching relationship is poor or the car body, bogie, wheels and other parts are worn out, and the fit clearance exceeds the operating limit, it is easy to cause the car body to vibrate abnormally, causing passengers Uncomfortable reactions may even affect the safety of train operation. [0003] At present, the problems that affect the riding comfort of my country's EMUs are mainly car shaking and shaking. In the initial stage of EMU wheel turning repair, when running on the rail with excessively polished gauge angle, the main contact position of the wheel and rail is concentrated on the top of the rail, the actual equivalent taper is r...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
CPCG01M17/007
Inventor 张瑞芳刘峰周永康辛恩承曾陆洋王后闯
Owner CHINA ACADEMY OF RAILWAY SCI CORP LTD
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