CN202994737U - Testing device used for measuring acoustic impedance performance of plate-shaped acoustic liner structure - Google Patents
Testing device used for measuring acoustic impedance performance of plate-shaped acoustic liner structure Download PDFInfo
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- CN202994737U CN202994737U CN 201220676422 CN201220676422U CN202994737U CN 202994737 U CN202994737 U CN 202994737U CN 201220676422 CN201220676422 CN 201220676422 CN 201220676422 U CN201220676422 U CN 201220676422U CN 202994737 U CN202994737 U CN 202994737U
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Abstract
The utility model belongs to the field of aerodynamic tests and machinery equipment and particularly relates to a testing device used for measuring the acoustic impedance performance of a plate-shaped acoustic liner structure. The testing device comprises a sound source (1) and a test piece clamping pipeline (2). The sound source (1) is arranged on a top cover plate (3) of the test piece clamping pipeline (2); a plurality of test piece installing supports (5) are arranged below a bottom cover plate (4); and long and round grooves (6) which are used for adjusting the heights of test pieces are arranged on the test piece installing supports (5). Under the existing technical and test conditions, a simple structure is utilized for effectively solving the problem that the errors of test results caused by the installation of the acoustic liner structure, and the test precision and the test accuracy are improved. The testing device has the advantages of being simple in structure and convenient to operate, saving time and labor and being reusable and highly reliable. The accuracy of results of impedance tests of the acoustic liner structure is effectively guaranteed. Thus, the testing device has good practicability, is easy to popularize and apply and has a practical value.
Description
Technical field
The utility model belongs to aeronautical dynamics test and plant equipment field, particularly relates to a kind of test unit for template sound lining structure acoustic impedance performance measurement.
Background technology
Microperforated panel sound lining structure be a kind of with microperforated panel as panel, honeycomb as inner core, the sheet metal novel sound absorption structure as backboard; Its sound absorption principle be utilize air molecule panel micropore place's frictional dissipation (acoustic resistance) with reflect the effect of (acoustic reactance) that disappears mutually, affect to external world thereby effectively reduce incident-noise; This structure possesses the characteristics such as simple structure, weight be lighter, pollution-free, is widely used in the engineering noise reduction.When carrying out the design of microperforated panel sound lining structure, at first complete structural design according to theoretical formula, next utilizes the testing impedance of model element to verify design proposal, after completing checking, just enters engineering and uses.
Common microperforated panel sound lining structure method of testing is 2-microphone sound, namely utilizes two synchronous microphones, the noise response at test sound lining perforated plate surface and backboard place respectively, thereby the impedance operator of the lining structure of must speaking.Because impedance operator and the incident airflow direction of sound lining structure are closely related, therefore in sound lining structure testing impedance, the installation accuracy of sound lining testpieces can have a strong impact on test result.Carry out large quantity research in this field abroad, and formed ripe method of testing and proving installation, but carried out blockade on new techniques to domestic.
Patent content
Patent purpose: in order to solve the installation of sound lining structure to the error of test result, reach the purpose that improves experimental accuracy, the utility model provides a kind of test unit for template sound lining structure acoustic impedance performance measurement, has solved the sound lining problem that affects test result is installed.
Technical scheme: a kind of test unit for template sound lining structure acoustic impedance performance measurement, comprise sound source 1 and testpieces clamping pipeline 2, described sound source 1 is installed on the top blind flange 3 of testpieces clamping pipeline 2, bottom cover plate 4 belows are provided with several testpieces mounting brackets 5, are provided with on described mounting bracket 5 for the oblong slots 6 of adjusting the testpieces height.
Both sides at testpieces clamping pipeline 2 are provided with mounting knob 7.
Beneficial effect: the utility model has solved under airflow field, how to ensure that sound lining testpieces and airflow direction angle satisfy the technical matters of testing requirements.The scheme that solves above technical matters is sound to be served as a contrast testpieces utilize described mounting bracket 5 to be arranged on the clamping pipeline 2 parallel with airflow direction, adjust test specimen and clamping pipeline 2 relative positions by the oblong slots 6 on described mounting bracket 5, the angle of adjustment sound lining testpieces and airflow direction.Under prior art condition and test condition, efficiently solve the sound lining structure with simple structure the problem that causes the test result error is installed, improved test accuracy and accuracy.Have advantages of simple in structure, easy to operate, laborsavingly save time, reusable, reliability is higher, effective guarantee the accuracy of sound lining structure testing impedance result.Therefore, practicality is better, is easy to apply, and has practical value.
Description of drawings
Accompanying drawing 1 is the three-dimensional profile schematic diagram of the utility model;
Accompanying drawing 2 is the utility model side-looking profile schematic diagram.
Wherein, 1-sound source, 2-testpieces clamping pipeline, 3-top blind flange, 4-bottom cover plate, 5-testpieces mounting bracket, 6-oblong slots, 7-mounting knob.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, sees also Fig. 1 to Fig. 2.
As shown in Figures 1 and 2, a kind of test unit for template sound lining structure acoustic impedance performance measurement, comprise sound source 1 and testpieces clamping pipeline 2, top blind flange 3, bottom cover plate 4, mounting bracket 5 is provided with on described mounting bracket 5 for the oblong slots 6 of adjusting the testpieces height, and the both sides of described testpieces clamping pipeline 2 are provided with mounting knob 7.
In carrying out testing impedance, can adjust testpieces according to testing requirements: under the airless condition, guarantee that sound lining testpieces is parallel with the top sound source, can complete test job; During testing impedance, only assurance sound lining testpieces upper surface is concordant with the bottom cover plate upper surface, can complete test job under carrying out the slipstream effect; Under carrying out air-flow with the bias current style of work under during testing impedance, can according to bias current angle, sound lining testpieces physical dimension, can by regulating the position of bolt on 4 testpieces mounting brackets, adjust the angle of testpieces and air-flow.
By above-mentioned measure, efficiently solve the sound lining structure with simple structure the problem cause the test result error be installed, improved test accuracy and accuracy, effective guarantee the accuracy of sound lining structure testing impedance result, be easy to apply, have higher practical value.
The utility model has solved under airflow field, how to ensure that sound lining testpieces and airflow direction angle satisfy the technical matters of testing requirements.The scheme that solves above technical matters is sound to be served as a contrast testpieces utilize described mounting bracket 5 to be arranged on the clamping pipeline 2 parallel with airflow direction, adjust test specimen and clamping pipeline 2 relative positions by the oblong slots 6 on described mounting bracket 5, the angle of adjustment sound lining testpieces and airflow direction.Under prior art condition and test condition, efficiently solve the sound lining structure with simple structure the problem that causes the test result error is installed, improved test accuracy and accuracy.Have advantages of simple in structure, easy to operate, laborsavingly save time, reusable, reliability is higher, effective guarantee the accuracy of sound lining structure testing impedance result.Therefore, practicality is better, is easy to apply, and has practical value.
Claims (2)
1. test unit that is used for template sound lining structure acoustic impedance performance measurement, it is characterized in that, comprise sound source [1] and testpieces clamping pipeline [2], described sound source [1] is installed on the top blind flange [3] of testpieces clamping pipeline [2], bottom cover plate [4] below is provided with several testpieces mounting brackets [5], is provided with on described mounting bracket [5] for the oblong slots [6] of adjusting the testpieces height.
2. a kind of test unit for template sound lining structure acoustic impedance performance measurement according to claim 1, is characterized in that, is provided with mounting knob [7] in the both sides of testpieces clamping pipeline [2].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676422 CN202994737U (en) | 2012-12-10 | 2012-12-10 | Testing device used for measuring acoustic impedance performance of plate-shaped acoustic liner structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220676422 CN202994737U (en) | 2012-12-10 | 2012-12-10 | Testing device used for measuring acoustic impedance performance of plate-shaped acoustic liner structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202994737U true CN202994737U (en) | 2013-06-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220676422 Expired - Fee Related CN202994737U (en) | 2012-12-10 | 2012-12-10 | Testing device used for measuring acoustic impedance performance of plate-shaped acoustic liner structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202994737U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870507A (en) * | 2019-01-25 | 2019-06-11 | 河海大学 | A kind of porous asphalt mixture noise absorbent and communication effect test device and usage |
| CN110487533A (en) * | 2019-09-17 | 2019-11-22 | 中国航发沈阳发动机研究所 | A kind of sound lining testpieces, assemble method and its test structure |
| CN111289257A (en) * | 2020-03-06 | 2020-06-16 | 中国飞机强度研究所 | Temperature-resistant acoustic liner acoustic characteristic test device and method |
| CN112595409A (en) * | 2020-12-18 | 2021-04-02 | 中国航天空气动力技术研究院 | Acoustic lining installation device applied to acoustic impedance test system by microphone array method |
| CN112665818A (en) * | 2020-12-18 | 2021-04-16 | 中国航天空气动力技术研究院 | Acoustic lining flow resistance measurement test device and method |
-
2012
- 2012-12-10 CN CN 201220676422 patent/CN202994737U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109870507A (en) * | 2019-01-25 | 2019-06-11 | 河海大学 | A kind of porous asphalt mixture noise absorbent and communication effect test device and usage |
| CN109870507B (en) * | 2019-01-25 | 2021-09-07 | 河海大学 | Porous asphalt mixture noise absorption and propagation effect testing device and application method |
| CN110487533A (en) * | 2019-09-17 | 2019-11-22 | 中国航发沈阳发动机研究所 | A kind of sound lining testpieces, assemble method and its test structure |
| CN110487533B (en) * | 2019-09-17 | 2021-11-19 | 中国航发沈阳发动机研究所 | Sound lining test piece, assembling method and test structure thereof |
| CN111289257A (en) * | 2020-03-06 | 2020-06-16 | 中国飞机强度研究所 | Temperature-resistant acoustic liner acoustic characteristic test device and method |
| CN112595409A (en) * | 2020-12-18 | 2021-04-02 | 中国航天空气动力技术研究院 | Acoustic lining installation device applied to acoustic impedance test system by microphone array method |
| CN112665818A (en) * | 2020-12-18 | 2021-04-16 | 中国航天空气动力技术研究院 | Acoustic lining flow resistance measurement test device and method |
| CN112665818B (en) * | 2020-12-18 | 2022-12-13 | 中国航天空气动力技术研究院 | Acoustic lining flow resistance measurement test device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Qin Haoming Inventor after: Hou Feng Inventor after: Zhang Hongtao Inventor after: Pang Yanbin Inventor before: Hou Feng Inventor before: Yan Qun Inventor before: Zhang Hongtao Inventor before: Pang Yanbin |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: HOU FENG YAN QUN ZHANG HONGTAO PANG YANBIN TO: QIN HAOMING HOU FENG ZHANG HONGTAO PANG YANBIN |
|
| 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: 20130612 Termination date: 20161210 |