CN205879553U - High speed train bogie wheel pair modal analysis's test device - Google Patents
High speed train bogie wheel pair modal analysis's test device Download PDFInfo
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- CN205879553U CN205879553U CN201620750267.7U CN201620750267U CN205879553U CN 205879553 U CN205879553 U CN 205879553U CN 201620750267 U CN201620750267 U CN 201620750267U CN 205879553 U CN205879553 U CN 205879553U
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- speed train
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- high speed
- power amplifier
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The utility model provides a high speed train bogie wheel pair modal analysis's test device, includes signal generator, power amplifier, vibration exciter, acceleration sensor, data collection card and PC, signal generator passes through the wire and connects and power amplifier, power amplifier passes through the wire and links to each other with the vibration exciter, the excitation head and the measured piece high speed train bogie wheel pair of vibration exciter contact, acceleration sensor's positive pole links to each other the minus earth with data collection card's collection port, data collection card passes through the data line and links to each other with the PC. The utility model discloses a mode of single -point excitation encourages of survey component, single -point excitation easy operation, and the cost is lower, can reach relatively good excitation effect moreover. The utility model discloses a piezoelectric type acceleration sensor, the vibrational acceleration signal that records the component that can be quick, accurate. The utility model discloses not only be applicable to the modal analysis of high speed train bogie wheel pair, it is also applicable to the modal analysis of remaining high speed train component.
Description
Technical field
The present invention relates to a kind of high-speed train bogie wheel assay device to model analysis, belong to high-speed train bogie wheel
To technical field.
Background technology
Bullet train is the common development trend of world's railway, and becomes the important symbol of railway modernization.
High-speed train bogie is in operation tasks such as taking on guiding, carrying, vibration damping, be the most also traction and braking
Whole executor, is the critical component of bullet train.
High-speed train bogie by take turns to, axle box, single stage suspension, framework, secondary suspension, driving means and foundation brake dress
The seven parts compositions such as put, take turns being the part that is connected with rail of high-speed train bogie, two, left and right wheel press securely
It is contained on same axletree and is formed.Wheel is to being bogie core key part, and its running status directly influences bogie
Stability.
Model analysis, is by external drive, utilizes data collecting card to carry out data acquisition, then to the data collected
Carry out signal processing and feature extraction, by modal analysis method obtain corresponding system modal parameter (mainly include natural frequency with
Damping ratio), and compared with the modal parameter of real system, to determine whether this pilot system is in the stable stage.So
Build a modal test device, by modal analysis method judge wheel to stability will be a kind of highly effective method.
Summary of the invention
The purpose of this utility model is, in order to realize to wheel to model analysis, determine that the wheel of high-speed train bogie is right
Whether it is in normal condition, the utility model proposes a kind of high-speed train bogie wheel assay device to model analysis.
The technical solution of the utility model is, a kind of high-speed train bogie wheel includes letter to the assay device of model analysis
Number generator, power amplifier, vibrator, acceleration transducer, data collecting card and PC.
Described acceleration transducer is piezoelectric acceleration transducer.
Described signal generator is connected by wire and power amplifier；Power amplifier passes through wire and vibrator phase
Even；The excitation head of vibrator is taken turns contacting with measured piece high-speed train bogie；The positive pole of acceleration transducer and data acquisition
The collection port of truck is connected, minus earth；Data collecting card is connected with PC by data wire.
The test principle of modal analysis test device is, when vibration reaches by a kind of high-speed train bogie of this utility model wheel
During to the natural frequency of system, system can produce resonance.Frequency of vibration and the natural frequency of institute's measuring wheel pair when vibrator generation
Time relatively, wheel is to producing resonance, and the vibration amplitude of this hour wheel pair is bigger, can be recorded by acceleration transducer,
The signal gathered is carried out feature extraction with process after, it is possible to obtain take turns to modal parameter.
This utility model utilizes signal generator to produce pumping signal, then is amplified by signal through power amplifier, is input to
In vibrator, make vibrator produce vibration, by excitation head to wheel to power effect, thus evoke take turns to vibration.In order to obtain
Take vibration signal, wheel on be mounted with acceleration transducer, measure wheel to vibration acceleration signal, data collecting card adopt
Collection vibration acceleration signal, and acceleration of vibration analogue signal is converted into digital signal, recently enter in PC, pass through mode
Analysis method, determine take turns to modal parameter, thus judge take turns to running status.
The beneficial effects of the utility model are, this utility model uses the mode of single-point-excitation to swash surveyed component
Encouraging, single-point-excitation is simple to operate, and cost is relatively low, and can reach reasonable arousal effect.This utility model have employed stable state
Sinusoidal excitation signal, by the frequency of sinusoidal signal is altered in steps, can effectively evoke each rank principal oscillation of tested component, and
And the frequency of pumping signal preferably controls with Amplitude Ration, output signal can reach the signal to noise ratio that comparison is high.This utility model uses
The device of vibrator excitation, this device is easier to control.This utility model have employed piezoelectric acceleration transducer, this
Plant sensor ratio sensitiveer, the vibration acceleration signal of component can be recorded fast and accurately.
This utility model device be not limited to high-speed train bogie wheel to model analysis, to remaining bullet train component
Model analysis be also suitable.
Accompanying drawing explanation
Fig. 1 is measurement apparatus schematic diagram of the present utility model；
Fig. 2 is measurement technical route figure of the present utility model；
In figure, 1 is that high-speed train bogie wheel is right；2 is piezoelectric acceleration transducer；3 is data collecting card；4 is PC
Machine；5 is signal generator；6 is power amplifier；7 is vibrator.
Detailed description of the invention
Detailed description of the invention of the present utility model is as shown in Figure 1.
It is right that the assay device of model analysis is taken turns by a kind of high-speed train bogie of the present embodiment wheel by high-speed train bogie
1, piezoelectric acceleration transducer 2, data collecting card 3, PC 4, signal generator 5, power amplifier 6,7 groups of vibrator
Become.Wherein signal generator 5 is connected with wire with power amplifier 6, and positive pole is connected with positive pole, and negative pole is connected with negative pole；
Power amplifier 6 is also connected with wire with vibrator 7, and the excitation head of vibrator 7 contacts to 1 with high-speed train bogie wheel；
The positive pole of acceleration transducer is connected with the collection port of data collecting card, minus earth；Data collecting card 3 is logical with PC 4
Cross what data wire was connected.
Before signals collecting, it is the signal that signal generator provides in order to ensure the signal in input vibrator, needs
First by being arranged on wheel, the signal of upper acceleration transducer is input in oscillograph, the frequency shown in observation oscilloscope and letter
The frequency of number generator output is the most consistent, can carry out the collection of vibration signal time consistent.
When carrying out signals collecting, it is first turned on the switch of signal generator, regulation extremely preplanned frequency, then at PC
On set storing path, then click on the button of signals collecting, vibration signal starts collected and preserves to corresponding file
In, after signals collecting terminates, to click on the button that shutdown signal gathers, turn off the switch of signal generator, signals collecting terminates.
Signal owing to collecting contains noise, in order to improve the accuracy of feature extraction, need to carry out before signal processing
Pretreatment, the method selecting Wavelet Denoising Method here.In order to obtain the shallower denoising curve of ratio, this utility model selects soft-threshold
Method；In order to reach reasonable denoising effect, this utility model selects the mode that given threshold denoising processes.In MATLAB,
Input primary signal, determines threshold value and denoising mode, the signal after available denoising.
In order to identify take turns to modal parameter, first pretreated signal is carried out empirical mode decomposition, obtains each rank
Character modules function and a survival function；Again each rank function after EMD decomposes is carried out Hilbert transform；Then utilize
MATLAB Software on Drawing instantaneous amplitude logarithmic chart and instantaneous phase figure, then carry out linear fit, obtain the expression formula of fitting function.
According to solving the modal parameter obtained, contrast with the modal parameter being in normal condition lower whorl pair, if
Error allow in the range of the range of error of 5% (this utility model patent pay the utmost attention to), then can determine whether to take turns to state for just
Often, if not in the range of this, then can determine whether take turns to state be abnormal.
Claims (2)
1. a high-speed train bogie takes turns the assay device to model analysis, it is characterised in that described device includes that signal is sent out
Raw device, power amplifier, vibrator, acceleration transducer, data collecting card and PC；Described signal generator is by wire even
Connect and power amplifier；Power amplifier is connected with vibrator by wire；The excitation head of vibrator and measured piece bullet train
Steering framing wheel is to contacting；The positive pole of acceleration transducer is connected with the collection port of data collecting card, minus earth；Data acquisition
Truck is connected with PC by data wire.
A kind of high-speed train bogie wheel assay device to model analysis, it is characterised in that institute
Stating acceleration transducer is piezoelectric acceleration transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620750267.7U CN205879553U (en) | 2016-07-18 | 2016-07-18 | High speed train bogie wheel pair modal analysis's test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620750267.7U CN205879553U (en) | 2016-07-18 | 2016-07-18 | High speed train bogie wheel pair modal analysis's test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205879553U true CN205879553U (en) | 2017-01-11 |
Family
ID=57695151
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620750267.7U Expired - Fee Related CN205879553U (en) | 2016-07-18 | 2016-07-18 | High speed train bogie wheel pair modal analysis's test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205879553U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186905A (en) * | 2018-07-31 | 2019-01-11 | 厦门大学 | A kind of modal test device and test method for wire saws parallel robot |
| CN109596363A (en) * | 2018-12-13 | 2019-04-09 | 汽-大众汽车有限公司 | A kind of NVH matching process |
| CN114323708A (en) * | 2022-03-14 | 2022-04-12 | 中国海洋大学 | Bogie frame performance test experimental apparatus |
-
2016
- 2016-07-18 CN CN201620750267.7U patent/CN205879553U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186905A (en) * | 2018-07-31 | 2019-01-11 | 厦门大学 | A kind of modal test device and test method for wire saws parallel robot |
| CN109596363A (en) * | 2018-12-13 | 2019-04-09 | 汽-大众汽车有限公司 | A kind of NVH matching process |
| CN114323708A (en) * | 2022-03-14 | 2022-04-12 | 中国海洋大学 | Bogie frame performance test experimental apparatus |
| CN114323708B (en) * | 2022-03-14 | 2022-05-27 | 中国海洋大学 | Bogie frame performance test experimental apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170111 Termination date: 20170718 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |