Wheel-rail interface damage evolution monitoring method based on noise signals
A noise signal, wheel-rail technology, used in wheel rim measurement/measurement, processing of detected response signals, railway vehicle shape measuring instrument, etc., can solve the problems of wheel-rail interface roughness change, wheel-rail noise change, etc. Simple maintenance, high intelligence, saving manpower and material resources
Inactive Publication Date: 2020-04-24
南京工大桥隧与轨道交通研究院有限公司
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In addition, damage to the wheel-rail interface will inevitably lead to changes in the roughness of the wheel-rail interface, which in turn will lead to changes in the wheel-rail noise
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[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments.
[0047] A method for monitoring the damage evolution of the wheel-rail interface based on noise signals, characterized in that: the noise collection device is arranged on a mobile carrier that changes along the wheel-rail interface, and the noise collection device is used to collect real-time data around the wheel-rail contact surface of rail vehicles For the instantaneous sound pressure of noise, the collected noise signal data is analyzed and processed, and the damage state of the wheel-rail interface of rail transit is judged. The specific steps are as follows:
[0048] Step 1, the noise signal is collected by the noise collection device, the noise signal is subjected to blind source separation, and the wheel-rail noise signal is retained;
[0049] Step 2, determine the characteristics of the wheel-rail noise signal, perform short-t...
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The invention relates to a wheel-rail interface damage evolution monitoring method based on noise signals. A noise acquisition device is arranged on a moving carrier changing along a wheel-rail interface. The method comprises the following steps of: firstly, acquiring wheel-rail noise signals through the noise acquisition device, performing blind source separation on the wheel-rail noise signals,and reserving the wheel-rail noise signals; performing short-time Fourier transform on the wheel-rail noise to obtain the frequency spectrum of the wheel-rail noise, and determining a wheel-rail noisetime-frequency characteristic of each driving interval; comparing the wheel-rail noise time-domain distribution characteristics and the time-frequency characteristic evolution rules with the wheel-rail noise time-domain distribution characteristics and the time-frequency characteristic evolution rules of each driving interval section in a normal driving state to obtain the types and the evolutionrules of wheel damage and the types and the evolution rules of steel rail damage corresponding to different monitoring time; and finally determining the damage position of the steel rail to obtain the position distribution of the steel rail damage. According to the monitoring method, the interface damage type and the damage position of the wheel rail can be obtained through monitoring by collecting the wheel rail noise.
Description
technical field [0001] The invention relates to the technical field of rail transit structure monitoring, in particular to a method for monitoring damage evolution of wheel-rail interfaces based on noise signals. Background technique [0002] The damage evolution of the wheel-rail interface is an important factor that causes random track irregularities and affects the vibration of the vehicle-rail system. When the damage of the wheel-rail interface reaches a certain level, it will affect the running quality of the train and even threaten the driving safety. In addition, damage to the wheel-rail interface will inevitably lead to changes in the roughness of the wheel-rail interface, which in turn will lead to changes in wheel-rail noise. The driving speed of urban rail transit is low, the wheel-rail noise occupies a dominant position in the total system noise during vehicle operation, and the interface damage has a significant impact on the system noise during vehicle operati...
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Login to View More IPC IPC(8): B61K9/10B61K9/12G01N29/04G01N29/46
CPCB61K9/10B61K9/12G01N29/04G01N29/46G01N2291/0234G01N2291/2623
Inventor 朱利明卓静超孙宇
Owner 南京工大桥隧与轨道交通研究院有限公司