Method and device for analyzing acceleration response of rail vehicles
An acceleration response, rail vehicle technology, applied in the field of rail vehicle test data analysis, to achieve the effect of easy implementation, simple algorithm, strong engineering application value
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Embodiment 1
[0070] Such as figure 1 Shown is a schematic flow chart of a method for analyzing the acceleration response of a rail vehicle provided by an embodiment of the present invention. The embodiment of the present invention performs relatively comprehensive vertical and lateral characteristics on a high-speed train with a speed class of 350km / h on the Beijing-Tianjin line. And input analysis. This analysis is based on the speed-frequency domain. The method includes the following steps:
[0071] Step a: Obtain the acceleration response signal of the rail vehicle and its corresponding speed information.
[0072] In order to correctly obtain the acceleration response signal of the rail vehicle and its corresponding speed information, an acceleration sensor and a speed sensor can be installed on the rail vehicle. In this embodiment, a more comprehensive vertical and lateral characteristics and input analysis are required. Vertical and lateral acceleration sensors and speed sensors are instal...
Embodiment 2
[0125] Such as Figure 13 This is a schematic flowchart of another method for analyzing acceleration response of rail vehicles provided by an embodiment of the present invention. The embodiment of the present invention also analyzes a high-speed train with a speed class of 350km / h on the Beijing-Tianjin line. In the method, step a- Step e is similar to that in the foregoing embodiment, and will not be repeated here. The difference from the first embodiment above is that this embodiment also includes step f-step i. The premise of performing these steps is that at least two acceleration signals are obtained at the same time in step a and there is input-output between the acceleration signals. Relationship, step f-step i specifically includes:
[0126] Step f: At each speed level, obtain the nominal transfer between the acceleration signals according to the power spectrum or amplitude spectrum obtained in step c, and the algorithm of step f and the amplitude estimation of the transf...
Embodiment 3
[0148] This embodiment provides the reasons for the abnormal vertical vibration of a subway rail vehicle and proposes directions for maintenance and improvement, including the following steps:
[0149] Step 1: Correctly obtain the digital signal in response to the acceleration of the rail vehicle and its corresponding speed information.
[0150] The JL-W4 rail vehicle operation quality meter was used to measure the vertical, horizontal and vertical acceleration near the traction pin of a subway rail vehicle, and the relevant information such as speed and operating conditions were matched according to the train monitoring data. The sampling frequency was 256 Hz. , The original signal filtering frequency is 20Hz.
[0151] Step 2: Group the acceleration signals at equal speed intervals, and obtain the amplitude spectrum equivalent to the power of each speed level acceleration signal and the maximum value of the amplitude spectrum according to the periodogram method.
[0152] In this embo...
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