A Vibration Aging Treatment Method for Large Metal Components of Rail Transit Equipment

A metal component, vibration aging technology, applied in the field of rail transit equipment testing, to achieve the effects of strong operability, elimination of residual stress, and high elimination of efficiency

Active Publication Date: 2018-05-15

ZHUZHOU CSR TIMES ELECTRIC CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

[0014] In view of this, the object of the present invention is to provide a vibration aging treatment method for large metal components of rai...

Method used

(3) the rail transit equipment large-scale metal member vibration aging treatment method described in the specific embodiment of the present invention adopts the sine frequency sweep test method of the vibration test bench, and by analyzing the acceleration spectrogram of the control point and the response point, it can be quickly and accurately accurately determine the resonant frequency of large metal components;

The rail transit equipment large-scale metal member vibration aging treatment method that embodiment 1 describes is aimed at the deficiency of existing vibration aging treatment method...

Abstract

The invention discloses a vibration aging treatment method for a railway traffic equipment large metal component. The method includes the following steps that the large metal component is installed on a vibration test table; the positions of a vibration test control point and a responding point are determined; a sine scanning vibration test is performed on the large metal component; the resonant frequency of the large metal component is determined; resonant frequency point fixed-frequency sine vibration aging treatment is performed on the large metal component; wide band random vibration aging treatment is performed on the large metal component; and the vibration aging treatment in the vertical direction, the transverse direction and the longitudinal direction of the large metal component is completed. The vibration aging treatment method for the railway traffic equipment large metal component can fast and effectively eliminate the remaining stress of the large metal component.

Technology Topic

Random vibrationBroadband +6

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Examples

Experimental program(3)

Example Embodiment

[0064] Example 1:

[0065] As attached figure 1 As shown, a specific embodiment of a method for vibration aging treatment of large metal components of rail transit equipment includes the following steps:

[0066] S101: Install the large metal component 1 on the vibration test bench 3;

[0067] S102: Determine the location of the vibration test control point and response point;

[0068] S103: Perform a sinusoidal sweep vibration test on large metal components 1;

[0069] S104: Determine the resonance frequency of the large metal component 1;

[0070] S105: Perform aging treatment of the large metal component 1 with fixed frequency sinusoidal vibration at the resonance frequency point;

[0071] S106: Perform broadband random vibration aging treatment on large metal component 1;

[0072] S107: Repeat the above steps S102 to S106 to respectively complete the vibration aging treatment of the large metal component 1 in the vertical, horizontal and vertical directions.

[0073] The vibration test bench 3 can complete sine sweep frequency vibration test, fixed frequency sine vibration aging treatment and broadband random vibration aging treatment.

[0074] Step S101 further includes:

[0075] The large metal component 1 is fastened and installed on the vibration test bench 3 through the clamp 2. The installation method of the large metal component 1 on the clamp 2 is the same as the actual installation method of the large metal component 1, as attached Figure 4 Shown. One end of the clamp 2 is tightly connected to the large metal member 1 by bolts, and the other end of the clamp 2 is tightly connected to the vibration test bench 3 by bolts.

[0076] Step S102 further includes:

[0077] The control point of the vibration test is selected on the table surface of the vibration test bench 3, and the response point of the vibration test is selected on the uppermost part of the large metal structure 1, and the accelerometer is bonded at the control point and the response point. To perform vibration aging treatment of the large metal component 1 in the vertical direction. When the large-scale metal component 1 is subjected to the horizontal and vertical vibration aging treatment, the control point of the vibration test is still selected on the surface of the vibration test bench, and the response point of the vibration test is selected on the large metal component 1 perpendicular to the vibration direction Noodles.

[0078] Step S104 further includes: through the sinusoidal sweep vibration test in step S103, the resonance frequency of the large metal member 1 can be determined according to the vibration test frequency spectrum. In step S104, the resonant frequency of the large metal member 1 is determined by analyzing the acceleration spectrum of the control point and the response point in a sinusoidal frequency sweep vibration test. As attached figure 2 As shown, the frequency corresponding to the resonance peak in the accelerometer spectrum at the response point can be regarded as the resonance frequency of the large metal component 1 , Attached figure 2 Resonance frequency in =50Hz. In the figure, B is the acceleration spectrum of the response point, and A is the resonance peak of the sine sweep acceleration spectrum.

[0079] In step S103, a sinusoidal sweep vibration test is performed through the vibration test bench 3. The parameters of the sinusoidal sweep vibration test are:

[0080] Vibration frequency range: 2~1600Hz;

[0081] Scan rate: 1~5oct/min;

[0082] Vibration acceleration: 0.2~1g (g is the unit of acceleration of gravity);

[0083] Number of scanning cycles: 1 cycle (1 round trip).

[0084] In step S105, the fixed-frequency sinusoidal vibration aging treatment is realized by the vibration comprehensive test bench 3, and the parameters of the fixed-frequency sinusoidal vibration aging treatment at the resonance frequency point are:

[0085] Vibration frequency: resonance frequency of large metal structure 1 , As attached figure 2 50Hz in the middle;

[0086] Vibration acceleration: 1~10g;

[0087] Test time: 15min~60min.

[0088] In step S106, the broadband random vibration aging treatment is realized by the vibration test bench 3, and the parameters of the broadband random vibration aging treatment are:

[0089] Broadband random vibration PSD (Power Spectral Density, power spectral density) spectrum is attached image 3 Shown in the attached image 3 In the vibration frequency range: 2~150Hz;

[0090] Root mean square value of vibration acceleration: 1~5g rms;

[0091] Test time: 30min~120min.

[0092] In step S107, according to the test requirements in step S105 and step S106, the vibration aging treatment of the large metal component 1 in the three vibration directions of the vertical, horizontal and longitudinal directions is completed.

[0093] The vibration aging treatment method for large-scale metal components of rail transit equipment described in Example 1 addresses the shortcomings of the existing vibration aging treatment methods, and fully takes into account the characteristics of large-scale metal components used in rail transit equipment. Vibration aging equipment), through sine frequency sweep test, fixed frequency sine aging treatment at resonance frequency point, broadband random vibration aging treatment, it can quickly eliminate the residual stress of large metal components. The aforementioned vibration aging treatment method described in Embodiment 1 has the advantages of simplicity and reliability, strong operability, and high residual stress elimination efficiency.

Example Embodiment

[0094] Example 2:

[0095] Another specific embodiment of a vibration aging treatment method for large metal components of rail transit equipment includes the following steps:

[0096] S101: Install the large metal component 1 on the vibration test bench 3;

[0097] S102: Determine the location of the vibration test control point and response point;

[0098] S103: Perform a sinusoidal sweep vibration test on large metal components 1;

[0099] S104: Determine the resonance frequency of the large metal component 1;

[0100] S105: Perform broadband random vibration aging treatment on the large metal component 1;

[0101] S106: Perform aging treatment of the large metal component 1 with fixed frequency sinusoidal vibration at the resonance frequency point;

[0102] S107: Repeat the above steps S102 to S106 to respectively complete the vibration aging treatment of the large metal component 1 in the vertical, horizontal and vertical directions.

[0103] In Embodiment 2, on the basis of the above-mentioned Embodiment 1, the steps of the fixed frequency sinusoidal vibration aging treatment at the resonance frequency point and the broadband random vibration aging treatment are interchanged, and the corresponding aging treatment effect can also be achieved.

Example Embodiment

[0104] Example 3:

[0105] In Embodiment 3, on the basis of the above-mentioned Embodiment 1 and Embodiment 2, the vibration aging treatment of the large metal member 1 is completed in the order of vertical→lateral→longitudinal vibration direction, which is the preferred order of vibration directions of the present invention. Of course, it is also possible to change the order of vibration directions of large metal components to achieve similar effects, such as vertical→longitudinal→transverse.

[0106] By implementing the technical solution of the vibration aging treatment method for large metal components of rail transit equipment described in the specific embodiment of the present invention, the following technical effects can be produced:

[0107] (1) The vibration aging treatment method for large metal components of rail transit equipment described in the specific embodiments of the present invention is simple, reliable, and highly operable, can quickly and effectively eliminate the residual stress of large metal components, and has high residual stress elimination efficiency;

[0108] (2) The vibration aging treatment method for large metal components of rail transit equipment described in the specific embodiment of the present invention uses a vibration test bench to complete the aging treatment of large metal components, so there is no need to purchase special vibration aging equipment;

[0109] (3) The vibration aging treatment method for large metal components of rail transit equipment described in the specific embodiments of the present invention adopts the sine sweep frequency test method of the vibration test bench, and by analyzing the acceleration spectrogram of the control point and the response point, it can quickly and accurately determine the large Resonance frequency of metal components;

[0110] (4) The vibration aging treatment method for large-scale metal components of rail transit equipment described in the specific embodiments of the present invention is performed after the fixed-frequency sinusoidal vibration aging treatment at the resonance frequency point, and then the broadband random vibration aging treatment, which can fully eliminate the large-scale metal components in the previous test For the residual stress that cannot be eliminated, the effect of vibration aging treatment is much better than that of general vibration aging treatment methods.

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A Vibration Aging Treatment Method for Large Metal Components of Rail Transit Equipment

A metal component, vibration aging technology, applied in the field of rail transit equipment testing, to achieve the effects of strong operability, elimination of residual stress, and high elimination of efficiency

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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