CN116380379A - Battery box vibration test device and vibration test method - Google Patents
Battery box vibration test device and vibration test method Download PDFInfo
- Publication number
- CN116380379A CN116380379A CN202310271247.6A CN202310271247A CN116380379A CN 116380379 A CN116380379 A CN 116380379A CN 202310271247 A CN202310271247 A CN 202310271247A CN 116380379 A CN116380379 A CN 116380379A
- Authority
- CN
- China
- Prior art keywords
- vibration
- spectrum
- psd
- psd spectrum
- battery box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 51
- 238000010998 test method Methods 0.000 title abstract description 10
- 238000001228 spectrum Methods 0.000 claims abstract description 126
- 230000009467 reduction Effects 0.000 claims abstract description 36
- 230000001133 acceleration Effects 0.000 claims abstract description 31
- 230000000694 effects Effects 0.000 claims abstract description 28
- 230000005284 excitation Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000004044 response Effects 0.000 claims abstract description 16
- 239000006096 absorbing agent Substances 0.000 claims abstract description 7
- 230000035939 shock Effects 0.000 claims abstract description 3
- 230000006378 damage Effects 0.000 claims description 34
- 208000027418 Wounds and injury Diseases 0.000 claims description 17
- 208000014674 injury Diseases 0.000 claims description 17
- 238000013016 damping Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/022—Vibration control arrangements, e.g. for generating random vibrations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/025—Measuring arrangements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present disclosure provides a battery box vibration test apparatus and a vibration test method, suitable for a battery box vibration test of an automatic driving mine car, the battery box vibration test apparatus comprising: the vibration table is used for generating vibration required by the test battery box; an outer frame connected to the vibration table; the inner frame is arranged in the outer frame and is connected with the outer frame through a shock absorber so that the inner frame and the outer frame can move relatively; the battery box is arranged in the inner frame and is connected with the inner frame. The vibration test method comprises the following steps: acquiring a vibration excitation signal, and inputting the vibration excitation signal into a vibration table; collecting vibration response signals of the battery box position by using acceleration collecting equipment; generating a corresponding first PSD spectrum according to the vibration response signal and a corresponding second PSD spectrum according to the vibration excitation signal by the same PSD spectrum generation method; and determining the vibration reduction effect according to the first PSD spectrum and the second PSD spectrum. By implementing the scheme disclosed by the invention, an accurate vibration reduction effect can be obtained.
Description
Technical Field
The disclosure relates to the field of tests, in particular to a vibration test device and a vibration test method for a battery box.
Background
The prior vibration test device and the vibration test method are mainly focused on the reliability verification of parts such as batteries, and the technical scheme is generally divided into the following categories: 1. improve the tie-down mechanism between sample piece and the expansion mesa of shaking table: the vibration tool is optimized through design so as to ensure that a vibration signal input by the vibration table is not distorted; 2. testing conditions of multi-dimensional loading on battery samples: in the vibration test process, a temperature and humidity environment is provided for the battery sample to be tested, and charging and discharging are performed simultaneously, so that the actual use working condition of the battery is simulated, and the verification reliability is ensured. However, the current technical scheme is to verify the reliability of the tested sample, the test time is long, the sample cannot be finely evaluated, the vibration standard of the test device is mostly national standard, the test device is not matched with the working conditions of vehicles such as mining vehicles, and the test device is lack of a related vibration test method aiming at battery boxes used under special vehicle types and extreme working conditions.
Disclosure of Invention
In order to solve at least one technical problem in the prior art, the disclosure provides a battery box vibration test device and a vibration test method.
According to a first aspect of the present disclosure, there is provided a battery box vibration test apparatus comprising:
the vibration table is used for generating vibration required by the test battery box;
an outer frame connected to the vibration table;
the inner frame is arranged in the outer frame and is connected with the outer frame through a shock absorber so that the inner frame and the outer frame can move relatively;
the battery box is arranged in the inner frame and is connected with the inner frame.
Optionally, a connecting rod for connecting the inner frame and the outer frame is arranged between the inner frame and the outer frame;
at least two connecting rods are respectively arranged at two opposite sides of the inner frame;
at least one of the dampers is vertically disposed at the bottom of the inner frame.
Optionally, the shaking table includes shaking table stage body and shaking table mesa, from shaking table mesa is fixed with and is used for the bolt outer frame's vibration frock.
According to a second aspect of the present disclosure, there is provided a vibration test method for performing a vibration damping test using the battery box vibration test apparatus according to any one of the first aspect of the present disclosure, the method comprising:
acquiring a vibration excitation signal, and inputting the vibration excitation signal into the vibrating table;
collecting vibration response signals of the battery box position by using acceleration collecting equipment;
generating a corresponding first PSD spectrum according to the vibration response signal and a corresponding second PSD spectrum according to the vibration excitation signal by the same PSD spectrum generation method;
and determining a vibration reduction effect according to the first PSD spectrum and the second PSD spectrum.
Optionally, the acquiring the vibration excitation signal includes:
acquiring vibration acceleration signals of a battery box acquired by a real vehicle under different working conditions;
the frequency domain signals which are not compressed in all directions when the standard PSD spectrum is generated according to the vibration acceleration signals are used as the vibration excitation signals;
the standard PSD spectrum and the first PSD spectrum are generated by the same method.
Optionally, the generating a standard PSD spectrum according to the vibration acceleration signal includes: and calculating a corresponding target mileage injury spectrum based on the vibration acceleration signal, and compressing and fitting the target mileage injury spectrum to generate a standard PSD spectrum.
Optionally, the compression fitting the target mileage injury spectrum to generate a standard PSD spectrum includes:
compressing and fitting the target mileage injury spectrum to obtain a corresponding PSD spectrum;
and taking the signal with the maximum strength in each direction as a standard signal according to the PSD spectrum to generate a corresponding standard PSD spectrum.
Optionally, compressing and fitting the target mileage injury spectrum to obtain a corresponding PSD spectrum, including:
based on an equal damage principle, compressing the target mileage damage spectrum according to the set vibration duration to obtain a compressed signal spectrum;
and taking the maximum value of the PSD signal at each frequency point in each direction, and carrying out envelope fitting processing on the compressed signal spectrum to obtain a corresponding PSD spectrum.
Optionally, determining the vibration reduction effect according to the first PSD spectrum and the second PSD spectrum includes:
and determining the vibration reduction effect according to the RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum.
Optionally, determining the vibration reduction effect according to the RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum includes:
according to formula e=1-RMS 1 /RMS 2 Determining a vibration reduction effect, wherein E represents a quantized value of the vibration reduction effect, RMS 1 Representing the RMS value of the first PSD spectrum, RMS 2 Representing the RMS value of the second PSD spectrum.
According to one or more technical schemes provided by the embodiment of the disclosure, accurate vibration reduction effect can be obtained through experiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 illustrates a schematic diagram of a battery box vibration testing apparatus according to an exemplary embodiment of the present disclosure;
FIG. 2 illustrates a flow chart of a vibration testing method according to an exemplary embodiment of the present disclosure;
FIG. 3 illustrates a sub-flowchart of a vibration testing method according to an exemplary embodiment of the present disclosure;
fig. 4 illustrates a logic flow diagram of a vibration testing method according to an exemplary embodiment of the present disclosure.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below. It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
Aspects of the present disclosure are described below with reference to the accompanying drawings.
Referring to fig. 1, a vibration testing apparatus for a battery box, comprising:
a vibration table 101 for generating vibration required for testing the battery box;
an outer frame 102 connected to the vibration table 101;
an inner frame 103 disposed in the outer frame 102 and connected to the outer frame 102 through a damper 104 so that the inner frame 103 and the outer frame 102 can move relatively;
the battery box 105 is provided in the inner frame 103 and connected to the inner frame 103.
The external frame 102 in the exemplary embodiment of the present disclosure is a fixed part, the internal frame 103 is a moving part, the external frame 102 moves together with the vibration table 101, the internal frame 103 moves together with the battery box 105, and the external frame 102 and the internal frame 103 are connected through the damper 104, so that when the external frame 102 moves, the internal frame 103 moves relatively to cause the stroke of the damper 104 to change, so that the battery box 105 fixed to the internal frame 103 and the external frame 102 fixed to the vibration table 101 move relatively to generate displacement, and the transferred vibration energy is attenuated, thereby playing a role of damping, and it can be seen that the internal frame 103 has two main roles: the vibration absorber is used for bearing the battery box, and the vibration absorber is used for damping the transmitted vibration energy through displacement generated by the motion of the vibration absorber in the vibration process, so that the vibration absorbing effect is realized. The battery box vibration test device of the present disclosure can generate vibration required for a test according to a test requirement by using the vibration table 101, the vibration is transferred to the external frame 102, the vibration is damped by the damper 104 and then transferred to the internal frame 103, and the vibration of the internal frame 103 is transferred to the battery box 105. At this time, the vibration signal of the battery box 105 may be collected by the vibration acceleration collection device, and the vibration reduction effect of the vibration reduction system having the outer frame 102, the inner frame 103, and the vibration absorbers 104 may be determined based on the collected vibration signal and the vibration signal outputted from the corresponding vibration table 101 (or the excitation signal of the vibration table 101).
In one embodiment, a connection rod 106 for connecting the inner frame 103 and the outer frame 102 is provided between the inner frame 103 and the outer frame 102. Illustratively, at least two connecting rods 106 are disposed between the inner frame 103 and the outer frame 102, and the at least two connecting rods 106 are disposed horizontally on opposite sides of the inner frame 103, respectively. In order to further improve the vibration reduction effect, the connecting rod 106 is an elastic connecting rod, and the connecting rod 106 can generate elastic supporting force on the inner frame 103, so that the vibration reduction effect of the vibration reduction device is better. The upper part of the inner frame 103 is connected with the outer frame 102 through a connecting rod 106, and the bottom of the inner frame 103 is connected with the outer frame 103 through a damper 104.
In one embodiment, at least one damper 104 is vertically disposed at the bottom of the inner frame 103. One or more dampers 104 may be provided, and two dampers 104 are vertically disposed at the bottom of the inner frame 103, for example.
In one embodiment, the shaker table 101 includes a shaker table body 1011 and a shaker table top 1012 from which a shaker tool 107 for bolting an external frame is secured. The vibration tool 107 is connected to the vibration table top 1012 by a fixing bolt 108.
The utility model discloses a battery box rack vibration test device can be used to the battery box 105 damping system effect evaluation test for the mine car, and this test device can be used to simulate the vibration load that battery box 105 received in real vehicle driving process, and the damping system in this device can effectively reduce vibration load, reduces the structural damage that battery box 105 received, increase of service life. The vibration test device for the battery box rack can verify the vibration reduction effect of the vibration reduction system in the device.
Referring to fig. 2, a vibration test method for performing a vibration reduction test using the battery box vibration test apparatus provided by the embodiment of the present disclosure includes:
s201, acquiring a vibration excitation signal, and inputting the vibration excitation signal into the vibration table.
In this step, acquiring the vibration excitation signal may include the steps of:
s301, acquiring vibration acceleration signals of a battery box acquired by a real vehicle under different working conditions.
In this step, the vibration acceleration signal collected by the acceleration collecting device has burrs, zero drift, and the like, so that the vibration acceleration signal can be preprocessed to be deburred, zero drift, and the like. It is appreciated that the pretreatment methods of the exemplary embodiments of the present disclosure may be various pretreatment methods that may achieve the objects of the embodiments of the present disclosure.
S302, taking frequency domain signals which are not compressed in all directions when a standard PSD spectrum is generated according to vibration acceleration signals as vibration excitation signals; the standard PSD spectrum and the first PSD spectrum are generated by the same method.
The vibration excitation signal is acquired from the vibration acceleration signal of the real vehicle, and is attached to the actual use working condition, so that the rationality of the verification standard is greatly ensured.
The standard PSD spectrum is a contrasting PSD power spectrum density spectrum. The frequency domain signals which are not compressed in all directions when the standard PSD spectrum is generated according to the vibration acceleration signals are used as vibration excitation signals, so that the verification effect and accuracy of the battery box vibration test device can be greatly improved.
In one embodiment, a corresponding target mileage injury spectrum is calculated based on the vibration acceleration signal, and the fitted target mileage injury spectrum is compressed to generate a standard PSD spectrum.
When calculating the corresponding target mileage injury spectrum based on the vibration acceleration signal, the following specific steps are as follows: calculating the power spectral density PSD of the vibration acceleration signal by means of fast Fourier transform and the like, and mapping PSD data to a damage index according to mileage requirements and parameter requirements by means of a damage principle and the like so as to obtain a target mileage damage spectrum. Other methods of damage spectrum calculation may also be used herein and will not be described in detail.
When compressing the fit target mileage injury spectrum to generate a standard PSD spectrum, it may be specifically: compressing and fitting a target mileage injury spectrum to obtain a corresponding PSD spectrum; and taking the signal with the maximum strength in each direction as a standard signal according to the PSD spectrum to generate a corresponding standard PSD spectrum. In the actual application process, a standard PSD spectrum corresponding to the target mileage damage spectrum can be generated by using the PSD generator, the damage of the target mileage damage spectrum keeps consistent, and if the amplitude of the extreme response value is too high, the equivalent time is adjusted.
When compressing and fitting the target mileage injury spectrum to obtain a corresponding PSD spectrum, the following steps are specifically: based on an equal damage principle, compressing a target mileage damage spectrum according to the set vibration duration to obtain a compressed signal spectrum; and taking the maximum value of the PSD signal at each frequency point in each direction to carry out envelope fitting processing on the compressed signal spectrum so as to obtain a corresponding PSD spectrum. The method has the advantages that the main frequency characteristic of the signal can be highlighted, the amplitude variation of the signal can be better reflected, the amplitude of the signal on the frequency can be accurately reflected by the PSD maximum value of each frequency when fitting, the overall amplitude variation condition of the signal can be better described by fitting the maximum values, and the structural state can be accurately judged based on the standard PSD spectrum generated by the method.
For example, referring to fig. 4, the step of acquiring the vibration excitation signal may be:
a. collecting vibration acceleration signals: and under different working conditions of different clients, the real vehicle collects vibration acceleration signals (time domain signals of a vibration road) of the battery box.
b. Preprocessing the vibration acceleration signal: deburring and zero drift removing are carried out, and loading working conditions are required according to requirements.
c. Calculating a target mileage injury spectrum: and calculating a target mileage damage spectrum according to the mileage requirement and the parameter requirement based on the vibration acceleration signal.
d. Compression treatment: based on an equal damage theory, compressing a target mileage damage spectrum according to the required vibration duration to obtain a solved compressed signal spectrum;
e. envelope fitting processing: and taking the PSD maximum value under each frequency point in each direction, and performing fitting simplification.
f. Generating a standard PSD spectrum: and comparing and analyzing each path of spectrum, and taking the signal with the maximum strength in each direction as a standard signal to generate a standard PSD spectrum.
g. And the vibration excitation signals are respectively obtained and generated to generate uncompressed frequency domain signals in three directions of the standard PSD spectrum as input signals of the vibration table, and the signals are used for simulating the vibration excitation signals received by the battery in the actual road driving process.
S202, acquiring vibration response signals of the battery box position by using an acceleration acquisition device.
For example, referring to fig. 4, a vibration excitation signal is input to the vibration table, and the signal sequentially passes through the vibration tool, the vibration damping frame (the outer frame and the inner frame) to reach the battery box, and the acceleration acquisition device is arranged on the battery box, and the response signal (vibration response signal) of the position of the battery box is acquired through the acceleration acquisition device.
In this step, the acceleration acquisition device may be used to acquire the vibration response signal of the position of the battery box 105 in real vehicle operation.
S203, respectively generating a corresponding first PSD spectrum according to the vibration response signal and a corresponding second PSD spectrum according to the vibration excitation signal by using the same PSD spectrum generation method.
When the corresponding first PSD spectrum is generated according to the vibration response signal (subjected to vibration reduction), the first PSD spectrum can be obtained by compressing the vibration response signal subjected to vibration reduction by the vibration reduction system according to the corresponding data processing step when the standard PSD spectrum is generated. This first PSD spectrum is associated with a target mileage.
When the corresponding second PSD spectrum is generated according to the vibration excitation signal (without vibration reduction), the second PSD spectrum can be obtained by compression according to the vibration excitation signal according to the corresponding data processing step when the standard PSD spectrum is generated.
S204, determining the vibration reduction effect according to the first PSD spectrum and the second PSD spectrum.
The RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum may be calculated, respectively, and the damping effect may be determined based on the RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum.
Specifically, according to the formula e=1-RMS 1 /RMS 2 Determining a vibration reduction effect, wherein E represents a quantized value of the vibration reduction effect, RMS 1 Representing the RMS value (vibration reduction) of the first PSD spectrum, RMS 2 The RMS value of the second PSD spectrum (no damping) is shown. The vibration reduction effect is quantized by using the quantized value of the vibration reduction effect, and the test result is more visual and effective.
Compared with a reliability test, the verification time is shorter in the technical scheme, on the premise that the excitation signals of the vibrating table are identical, the acceleration acquisition equipment is adopted to acquire response signals of the battery box in two states of the vibration reduction system and the vibration reduction system, a final PSD spectrum (frequency domain spectrum) is formed by compressing the response signals, and the PSD spectrum RMS value (root mean square value) in the two states is calculated and compared to realize quantitative evaluation of the vibration reduction system.
Claims (10)
1. A battery box vibration test device, comprising:
the vibration table is used for generating vibration required by the test battery box;
an outer frame connected to the vibration table;
the inner frame is arranged in the outer frame and is connected with the outer frame through a shock absorber so that the inner frame and the outer frame can move relatively;
the battery box is arranged in the inner frame and is connected with the inner frame.
2. The vibration testing apparatus of claim 1, wherein a connecting rod for connecting the inner frame and the outer frame is provided between the inner frame and the outer frame;
at least two connecting rods are respectively arranged at two opposite sides of the inner frame;
at least one of the dampers is vertically disposed at the bottom of the inner frame.
3. The battery box vibration testing device according to claim 1, wherein the vibration table comprises a vibration table body and a vibration table top, and the self-vibration table top is fixed with a vibration tool for bolting the external frame.
4. A vibration testing method for performing vibration damping test using the battery box vibration testing apparatus according to any one of claims 1 to 3, the method comprising:
acquiring a vibration excitation signal, and inputting the vibration excitation signal into the vibrating table;
collecting vibration response signals of the battery box position by using acceleration collecting equipment;
generating a corresponding first PSD spectrum according to the vibration response signal and a corresponding second PSD spectrum according to the vibration excitation signal by the same PSD spectrum generation method;
and determining a vibration reduction effect according to the first PSD spectrum and the second PSD spectrum.
5. The vibration testing method of claim 4, wherein the acquiring a vibration excitation signal comprises:
acquiring vibration acceleration signals of a battery box acquired by a real vehicle under different working conditions;
the frequency domain signals which are not compressed in all directions when the standard PSD spectrum is generated according to the vibration acceleration signals are used as the vibration excitation signals;
the standard PSD spectrum and the first PSD spectrum are generated by the same method.
6. The vibration testing method of claim 5, wherein generating a standard PSD spectrum from the vibration acceleration signal comprises: and calculating a corresponding target mileage injury spectrum based on the vibration acceleration signal, and compressing and fitting the target mileage injury spectrum to generate a standard PSD spectrum.
7. The vibration testing method of claim 6, wherein the compression fitting the target mileage injury profile to generate a standard PSD spectrum comprises:
compressing and fitting the target mileage injury spectrum to obtain a corresponding PSD spectrum;
and taking the signal with the maximum strength in each direction as a standard signal according to the PSD spectrum to generate a corresponding standard PSD spectrum.
8. The vibration testing method of claim 7, wherein compression fitting the target mileage injury spectrum to obtain a corresponding PSD spectrum comprises:
based on an equal damage principle, compressing the target mileage damage spectrum according to the set vibration duration to obtain a compressed signal spectrum;
and taking the maximum value of the PSD signal at each frequency point in each direction, and carrying out envelope fitting processing on the compressed signal spectrum to obtain a corresponding PSD spectrum.
9. The vibration testing method of claim 4, wherein determining a vibration reduction effect from the first PSD spectrum and the second PSD spectrum comprises:
and determining the vibration reduction effect according to the RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum.
10. The vibration testing method of claim 9, wherein determining the vibration reduction effect based on the RMS value of the first PSD spectrum and the RMS value of the second PSD spectrum comprises:
according to formula e=1-RMS 1 /RMS 2 Determining a vibration reduction effect, wherein E represents a quantized value of the vibration reduction effect, RMS 1 Representing the RMS value of the first PSD spectrum, RMS 2 Representing the RMS value of the second PSD spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310271247.6A CN116380379A (en) | 2023-03-16 | 2023-03-16 | Battery box vibration test device and vibration test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310271247.6A CN116380379A (en) | 2023-03-16 | 2023-03-16 | Battery box vibration test device and vibration test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116380379A true CN116380379A (en) | 2023-07-04 |
Family
ID=86966670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310271247.6A Pending CN116380379A (en) | 2023-03-16 | 2023-03-16 | Battery box vibration test device and vibration test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116380379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150095A (en) * | 2024-05-11 | 2024-06-07 | 宁德时代新能源科技股份有限公司 | Battery pack vibration testing method, device, system, terminal and storage medium |
-
2023
- 2023-03-16 CN CN202310271247.6A patent/CN116380379A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118150095A (en) * | 2024-05-11 | 2024-06-07 | 宁德时代新能源科技股份有限公司 | Battery pack vibration testing method, device, system, terminal and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108036908A (en) | A kind of batteries of electric automobile bag random vibration fatigue accelerated method based on true road spectrum | |
| CN116380379A (en) | Battery box vibration test device and vibration test method | |
| Lang et al. | Comparing vibration measurements in an electric vehicle with standard vibration requirements for Li-ion batteries using power spectral density analysis | |
| CN1955750A (en) | Modal checking method and system of vacuum electronic device | |
| CN106446354B (en) | Hybrid electric vehicle power train system torsional oscillation prediction and removing method | |
| Ennawaoui et al. | Mathematical modeling of mass spring’s system: Hybrid speed bumps application for mechanical energy harvesting | |
| CN112461548A (en) | Method for determining durable bench test time of light truck fender bracket assembly | |
| CN104849073A (en) | Test apparatus and test method for durability of vehicle vibration damper | |
| CN109960877B (en) | Method and system for analyzing strength of automobile battery pack bracket | |
| CN102818686B (en) | Grid-control TWT metal grid mesh Modal Experimental Method | |
| Choi et al. | A study on the accelerated vibration endurance tests for battery fixing bracket in electrically driven vehicles | |
| CN110186700A (en) | A kind of high-speed EMUs pivoted arm node device for testing dynamic stiffness and test method | |
| CN116164921B (en) | Method, apparatus and medium for testing rack vibration of fuel cell stack | |
| CN106548009B (en) | Method and device for evaluating power impact effect of goaf power transmission tower | |
| CN115343007A (en) | Equivalent sine simulation method and system for satellite transportation impact process | |
| Gao et al. | Programmed load spectrum for fatigue bench test of a vehicle body | |
| Cui et al. | A methodology to integrate a nonlinear shock absorber dynamics into a vehicle model for system identification | |
| CN105759156A (en) | Multidirectional vibration energy collecting device performance test system and method thereof | |
| CN115165396A (en) | Method, apparatus, and medium for determining on-board hydrogen system test data of vehicle | |
| CN116252611A (en) | Battery box vibration damper, structural state monitoring method and system | |
| Jung et al. | Reliability achievement of the driving system parts through development of vibration-fatigue evaluation method | |
| Maher | Combined time and frequency domain approaches to the operational identification of vehicle suspension systems | |
| CN118153213B (en) | Mine car cab fault analysis method, electronic equipment and readable storage medium | |
| CN116577053A (en) | DCDC bracket vibration acceleration test method and test device | |
| CN114136572B (en) | Test vibration tool, vehicle equipment fatigue test device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |