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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, strong engineering application value, and simple algorithm

Active Publication Date: 2012-07-04
LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is currently no method that can directly use vehicle dynamics line tests or even vehicle dynamics monitoring data during actual operation for comprehensive and effective evaluation of rail vehicle characteristics and fixed-wavelength vehicle input

Method used

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  • Method and device for analyzing acceleration response of rail vehicles
  • Method and device for analyzing acceleration response of rail vehicles
  • Method and device for analyzing acceleration response of rail vehicles

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Experimental program
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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 rail vehicles provided by the embodiment of the present invention. The embodiment of the present invention is to conduct a relatively comprehensive vertical and lateral characteristics of a high-speed train with a speed grade of 350km / h on the Beijing-Tianjin Line And input analysis, this analysis is based on the velocity-frequency domain basis, and this method comprises the following steps:

[0071] Step a: Obtain the rail vehicle acceleration response signal and its corresponding speed information.

[0072] In order to correctly obtain the rail vehicle acceleration response signal and its corresponding speed information, an acceleration sensor and a speed sensor can be installed on the rail vehicle. Vertical and lateral acceleration sensors and speed sensors were installed at the proper positions of the wheelset, frame, and car body corresponding to the bogie, and ...

Embodiment 2

[0125] Such as Figure 13 Another schematic flow chart of the method for analyzing the acceleration response of rail vehicles provided by the embodiment of the present invention, the embodiment of the present invention is also an analysis of a high-speed train with a speed grade of 350km / h on the Beijing-Tianjin line, in the method, steps a- Step e is similar to that in the above 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 response signals are simultaneously acquired in step a and there is an input between the acceleration response signals - output relationship, step f - step i specifically includes:

[0126] Step f: At each speed level, according to the power spectrum or amplitude spectrum obtained in step c, the nominal transfer between the acceleration response signals is obtained, the algorithm of step f...

Embodiment 3

[0148] This embodiment is the reason for the vertical abnormal vibration of a certain subway rail vehicle and proposes maintenance and improvement directions, including the following steps:

[0149] Step 1: Correctly obtain the digital signal of the rail vehicle acceleration response and its corresponding speed information.

[0150] The JL-W4 rail vehicle running quality instrument was used to measure the vertical, horizontal, and vertical accelerations near the traction pin of a subway rail vehicle, and the speed, operating conditions and other relevant information were matched according to the train monitoring data, and the sampling frequency was 256Hz , the original signal filtering frequency is 20Hz.

[0151] Step 2: Group the acceleration response signals at equal velocity intervals, and obtain the equivalent amplitude spectrum and the maximum value of the amplitude spectrum of the acceleration response signal power at each velocity level according to the periodogram meth...

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Abstract

The invention provides a method and device for analyzing the acceleration response of rail vehicles. The method comprises the following steps: a. acquiring acceleration response signals of the rail vehicles and the corresponding speed information thereof; b. grouping the acceleration response signals according to speeds; c. obtaining a power spectrum or a power equivalent amplitude spectrum of the corresponding acceleration response signal of each speed stage by a periodogram method; d. representing the result of step c by a three-dimensional speed-frequency spectrogram; and e. identifying local peak values not changing with speed and / or local peak values changing with speed in the three-dimensional speed-frequency spectrogram. The method and the device for analyzing the acceleration response of the rail vehicles of the embodiment of the invention can comprehensively, visually and effectively obtain the characteristics of the rail vehicles and input of fixed wavelength vehicles.

Description

technical field [0001] The invention relates to a method for analyzing rail vehicle test data, in particular to a method and device for analyzing rail vehicle acceleration response. Background technique [0002] The vibration characteristics analysis of rail vehicles is an important means of rail vehicle design optimization, operation and maintenance, and is generally completed through vehicle dynamics simulation calculations and vehicle indoor vibration or rolling vibration tests. Due to the limitations of software capabilities, model parameters, laboratory incentive characteristics and incentive levels, the results of simulation calculations and laboratory tests are often different from the actual operation of the vehicle on the line, and sometimes large deviations may occur. [0003] It is one of the long-term research directions of railway researchers to directly use the vehicle dynamics line test and even the dynamic monitoring data during the actual operation of the ve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P15/18G01M17/08
Inventor 曾宇清甘敦文董孝卿倪纯双于卫东扈海军刘秀波王卫东黄强
Owner LOCOMOTIVE & CAR RES INST OF CHINA ACAD OF RAILWAY SCI
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