CN208155598U - A kind of vehicle body mating formation couples fissipation factor test macro - Google Patents
A kind of vehicle body mating formation couples fissipation factor test macro Download PDFInfo
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- CN208155598U CN208155598U CN201820430653.7U CN201820430653U CN208155598U CN 208155598 U CN208155598 U CN 208155598U CN 201820430653 U CN201820430653 U CN 201820430653U CN 208155598 U CN208155598 U CN 208155598U
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- signal
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- fissipation factor
- vehicle body
- measured structure
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Abstract
The utility model provides a kind of vehicle body mating formation and couples fissipation factor test macro, and force signal acquisition sensor is arranged on the mandril of vibration excitor, and force signal acquires sensor and measured structure is rigidly connected；The signal output end that collector occurs for signal is connect by power amplifier with vibration excitor；The signal acquisition terminal that with signal collector occurs for force signal acquisition sensor and contactless speed signal acquisition sensor is connect.A kind of vehicle body mating formation of the utility model couples fissipation factor test macro, the structural member that be connected can be carried out coupling fissipation factor test analysis, and then obtain and couple fissipation factor situation under different frequency, have the characteristics that test result is accurate and has wide range of applications.
Description
Technical field
The utility model belongs to automobile research and development and performance detection field, couples more particularly, to a kind of vehicle body mating formation
Fissipation factor test macro.
Background technique
Automobile vibration noise source carries out vibration transmitting by structural member adjacent thereto, and then can effectively influence car
Level of NVH, so the superiority and inferiority of NVH depends not only on outside sound source or the stimulation level size of vibration source, also with the architectural characteristic of vehicle body
There is direct relationship.And vehicle body damping is to influence the principal element of body vibrations noise transmitting, the damping of vehicle body is by body structure
Couple damping (coupling fissipation factor) decision between part itself damping (internal loss factor) and connector.Many components in body structure
Be attached by sealing strip or viscose glue etc., the structure that is connected to couple fissipation factor bigger, then after energy is by its transmitting
Decay more, realizing has preferable anti-vibration performance.
Under prior art conditions, in conventional CAE analysis, structure mostlys come from the interstructural fissipation factor that couples
Empirical data, or directly defaulted by respective material definition, there has been no the cases of actual test result application.It is so defined
It is not only difficult to really reflect that different structure connects, it is character of energy damping under different frequency bands, and may cause calculating analysis
As a result mistake, the result of final research and development and the performance test for influencing vehicle.
Utility model content
In view of this, the utility model, which is directed to a kind of vehicle body mating formation, couples fissipation factor test macro, it can
Under real vehicle installation condition, the structural member that is connected is carried out to couple fissipation factor test analysis, and then obtain under different frequency
Fissipation factor situation is coupled, energy transmission loss decaying of the true science reflection associated structural components under actual working state is special
Property, change the defect that empirical data and material identification can only be relied on the judgement for coupling fissipation factor in the prior art.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of vehicle body mating formation couples fissipation factor test macro, including force signal acquisition sensor, suspension are fixed
Vibration excitor, power amplifier, signal collector, contactless speed signal acquisition sensor and computer occurs；Force signal
Acquisition sensor is arranged on the mandril of vibration excitor, and force signal acquires sensor and measured structure is rigidly connected；Signal is adopted
The signal output end of storage is connect by power amplifier with vibration excitor；Force signal acquires sensor and contactless speed signal
The signal acquisition terminal that with signal collector occurs for acquisition sensor is connect；Signal occurs collector data communication interface and calculates
Machine connection.
It directly contacting between measured structure part or is connected by rubber strip, signal occurs collector and issues white noise signal,
And signal is amplified through power amplifier, driving vibration excitor generates pumping signal, motivates to measured structure part, power letter
For acquiring vibration excitor to the force input of measured structure part, contactless speed signal acquires sensor for number acquisition sensor
For acquiring the speed responsive signal on measured structure part.Contactless speed signal acquisition sensor and force signal acquisition sensing
The signal acquisition terminal of collector occurs for device signal input signal collected, and the data that collector occurs for signal input computer.
It is PCB Model 2301-01A sensor that force signal, which acquires sensor, and vibration excitor is MB Modal2 vibration excitor, function
Rate amplifier is US-20W power amplifier.
It is that collector occurs for LMS SCM05 signal that collector, which occurs, for signal, and contactless speed signal acquisition sensor is
Polytec PSV-500 sensor.
A kind of vehicle body mating formation couples fissipation factor test method, including above-mentioned vehicle body mating formation is used to couple
Fissipation factor test macro carries out following steps：
Step 1：First measured structure part is connect with the second measured structure part real vehicle state, directly to contact or passing through rubber
Item connection, measures the weight m of the first measured structure part；
Step 2：Second measured structure part of the vibration excitor on the second measured structure part connect side with the first measured structure part
Equally distributed n excitation point is set at edge, while the stress feelings that sensor acquires n excitation point respectively are acquired by force signal
Condition Fn；
Step 3：While vibration excitor is to n excitation click-through row energization on the second measured structure part, use is contactless
Speed signal acquisition sensor acquires the speed Vn for n excitation point being arranged in step 2 respectively, while in the first measured structure
The speed V of K test point is acquired on partK；
Step 4：Calculate separately the input power Pn of n excitation point on the second measured structure part；
Wherein Pn=FnVn, Fn are the stress condition Fn of n-th of excitation point, and Vn is the speed Vn of n-th of excitation point；
Step 5：The output energy of K excitation point on the first measured structure part is calculated separately, and calculates average value E；
WhereinM is the weight m, V of the first measured structure partKIt is in the first measured structure part
Acquire the speed V of k-th test pointK；
Step 6：Calculate separately n excitation point on the second measured structure part, the first measured structure part of corresponding different frequency f
Loss factor values η n is coupled with the second measured structure part, and carries out linear averaging, finally obtains the first measured structure part and second
Measured structure part couples fissipation factor η；
Wherein η n=Pn/2 π fE, wherein Pn is the input power Pn of n-th of excitation point on the second measured structure part；E is
The average value E of the output energy of K excitation point on one measured structure part；F is corresponding different driving frequencies.
Further, in step 2, n number of excitation point of setting is 3 to 5.
Further, in step 3, K number of the test point of setting is 5 to 7.
Compared with the existing technology, a kind of vehicle body mating formation of the utility model couples fissipation factor test macro, has
Following advantage：
A kind of vehicle body mating formation of the utility model couples fissipation factor test macro, and being used cooperatively can install in real vehicle
Under state, couple fissipation factor test analysis to the structural member that is connected, so obtain under different frequency couple loss because
Subcase has following technical advantage：
1. a kind of vehicle body mating formation of the utility model couples fissipation factor test macro, using Power Flow to knot
The input and output vibrational energy of component is calculated, and test device is stable and reliable for performance.It is tested simultaneously from the angle of energy
Analysis, reduces error caused by assuming due to mathematical computations, and test result is accurate and reliable.
2. a kind of vehicle body mating formation of the utility model couples fissipation factor test macro, it can be achieved that under different frequency
The calculating that fissipation factor is coupled between structural connection compensates for the deficiency coupled in fissipation factor test method, is in CAE analysis
The definition of damping parameter provides technical support, is with a wide range of applications.
3. a kind of vehicle body mating formation of the utility model couples fissipation factor test macro, believed using contactless speed
Number acquisition sensor avoids the additional mass problem of conventional touch sensor initiation, further reduces test error.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings：
Fig. 1 is that a kind of vehicle body mating formation of the utility model embodiment couples the signal of fissipation factor test system structure
Figure；
Fig. 2 is that a kind of vehicle body mating formation of the utility model embodiment couples the signal of fissipation factor test macro process
Figure.
Description of symbols：
1- the first measured structure part；2- the second measured structure part；3- force signal acquires sensor；4- vibration excitor；5- power
Amplifier；Collector occurs for 6- signal；The contactless speed signal of 7- acquires sensor；8- computer.
Specific embodiment
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of describing the present invention and simplifying the description, rather than indicate
Or imply that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore cannot understand
For limitations of the present invention.In addition, term " first ", " second " etc. are used for description purposes only, and should not be understood as indicating
Or it implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " etc. are defined as a result,
Feature can explicitly or implicitly include one or more of the features.It is in the description of the present invention, unless another
It is described, the meaning of " plurality " is two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State the concrete meaning of term in the present invention.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of vehicle body mating formation couples fissipation factor test macro, including force signal acquires sensor
3, the fixed vibration excitor 4 of suspension, power amplifier 5, signal occur collector 6, contactless speed signal acquisition sensor 7 and
Computer 8；Force signal acquisition sensor 3 is arranged on the mandril of vibration excitor 4, and force signal acquires sensor 3 and measured structure is rigid
Property connection；The signal output end that collector 6 occurs for signal is connect by power amplifier 5 with vibration excitor 4；Force signal acquisition sensing
The signal acquisition terminal that with signal collector 6 occurs for device 3 and contactless speed signal acquisition sensor 7 is connect；Signal occurs
6 data communication interface of collector is connect with computer 8.
It directly contacting between measured structure part or is connected by rubber strip, signal occurs collector 6 and issues white noise signal,
And signal is amplified through power amplifier 5, driving vibration excitor 4 generates pumping signal, motivates to measured structure part, power
For acquiring vibration excitor 4 to the force input of measured structure part, contactless speed signal acquisition passes signal acquisition sensor 3
Sensor 7 is used to acquire the speed responsive signal on measured structure part.Contactless speed signal acquisition sensor 7 and force signal are adopted
Collect the signal acquisition terminal that collector 6 occurs for the signal input signal collected of sensor 3, the data that collector 6 occurs for signal are defeated
Enter computer 8.
It is PCB Model 2301-01A sensor that force signal, which acquires sensor 3, and vibration excitor 4 is MB Modal2 vibration excitor,
Power amplifier 5 is US-20W power amplifier.
It is that collector occurs for LMS SCM05 signal that collector 6, which occurs, for signal, and contactless speed signal acquires sensor 7
It is Polytec PSV-500 sensor.
As shown in Figs. 1-2, a kind of vehicle body mating formation couples fissipation factor test method, including above-mentioned vehicle body is used to join
Binding component couples fissipation factor test macro, carries out following steps：
Step 1：First measured structure part 1 is connect with 2 real vehicle state of the second measured structure part, directly to contact or passing through rubber
Adhesive tape connection, measures the weight m of the first measured structure part 1；
Step 2：Second measured structure part 2 and first measured structure part 1 of the vibration excitor 4 on the second measured structure part 2 connect
It connects edge and equally distributed n excitation point is set, while sensor 3 is acquired by force signal and acquires n excitation point respectively
Stress condition Fn；
Step 3：While vibration excitor 4 is to n excitation click-through row energization on the second measured structure part 2, use is non-contact
Formula speed signal acquisition sensor 7 acquires the speed Vn for n excitation point being arranged in step 2 respectively, while tested first
The speed V of K test point is acquired on structural member 1K；
Step 4：Calculate separately the input power Pn of n excitation point on the second measured structure part 2；
Wherein Pn=FnVn, Fn are the stress condition Fn of n-th of excitation point, and Vn is the speed Vn of n-th of excitation point；
Step 5：The output energy of K excitation point on the first measured structure part 1 is calculated separately, and calculates average value E；
WhereinM is the weight m, V of the first measured structure part 1KIt is in the first measured structure
The speed V of the acquisition k-th test point of part 1K；
Step 6：Calculate separately n excitation point on the second measured structure part 2, the first measured structure of corresponding different frequency f
Part 1 and the second measured structure part 2 couple loss factor values η n, and carry out linear averaging, finally obtain the first measured structure part 1 with
Second measured structure part 2 couples fissipation factor η；
Wherein η n=Pn/2 π fE, wherein Pn is the input power Pn of n-th of excitation point on the second measured structure part 2；E is
The average value E of the output energy of K excitation point on first measured structure part 1；F is corresponding different driving frequencies.
As shown in Figs. 1-2, in step 2, n number of excitation point of setting is 3 to 5.
As shown in Figs. 1-2, in step 3, K number of the test point of setting is 5 to 7.
The above is only the preferred embodiments of the present utility model only, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (1)
1. a kind of vehicle body mating formation couples fissipation factor test macro, it is characterised in that：Sensor is acquired including force signal
(3), collector (6), the acquisition of contactless speed signal occur for the fixed vibration excitor (4) of suspension, power amplifier (5), signal
Sensor (7) and computer (8)；Force signal acquisition sensor (3) is arranged on the mandril of the vibration excitor (4), described
Force signal acquires sensor (3) and measured structure part is rigidly connected；The signal output end that collector (6) occur for the signal passes through
The power amplifier (5) connect with the vibration excitor (4)；Force signal acquisition sensor (3) and the contactless speed
The signal acquisition terminal that with the signal collector (6) occur for degree signal acquisition sensor (7) is connect；The signal acquires
Device (6) data communication interface is connect with the computer (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820430653.7U CN208155598U (en) | 2018-03-28 | 2018-03-28 | A kind of vehicle body mating formation couples fissipation factor test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820430653.7U CN208155598U (en) | 2018-03-28 | 2018-03-28 | A kind of vehicle body mating formation couples fissipation factor test macro |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208155598U true CN208155598U (en) | 2018-11-27 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820430653.7U Expired - Fee Related CN208155598U (en) | 2018-03-28 | 2018-03-28 | A kind of vehicle body mating formation couples fissipation factor test macro |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489736A (en) * | 2018-03-28 | 2018-09-04 | 中汽研（天津）汽车工程研究院有限公司 | A kind of vehicle body mating formation couples fissipation factor test system and method |
| CN110987471A (en) * | 2019-12-11 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Method for testing coupling loss factor between complex structures by increasing damping |
-
2018
- 2018-03-28 CN CN201820430653.7U patent/CN208155598U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108489736A (en) * | 2018-03-28 | 2018-09-04 | 中汽研（天津）汽车工程研究院有限公司 | A kind of vehicle body mating formation couples fissipation factor test system and method |
| CN110987471A (en) * | 2019-12-11 | 2020-04-10 | 中国汽车工程研究院股份有限公司 | Method for testing coupling loss factor between complex structures by increasing damping |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181127 Termination date: 20200328 |