CN111398148A - Thermo-acoustic protection device and thermo-acoustic protection method for multi-field coupling test - Google Patents
Thermo-acoustic protection device and thermo-acoustic protection method for multi-field coupling test Download PDFInfo
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- CN111398148A CN111398148A CN202010362772.5A CN202010362772A CN111398148A CN 111398148 A CN111398148 A CN 111398148A CN 202010362772 A CN202010362772 A CN 202010362772A CN 111398148 A CN111398148 A CN 111398148A
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 230000008878 coupling Effects 0.000 title claims abstract description 24
- 238000010168 coupling process Methods 0.000 title claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims description 29
- 230000035939 shock Effects 0.000 claims description 19
- 238000013016 damping Methods 0.000 claims description 15
- 239000000498 cooling water Substances 0.000 claims description 14
- 239000000110 cooling liquid Substances 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000001012 protector Effects 0.000 claims 5
- 239000002826 coolant Substances 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 21
- 238000009661 fatigue test Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000001808 coupling effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
- G01N17/002—Test chambers
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- Environmental Sciences (AREA)
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- General Health & Medical Sciences (AREA)
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Abstract
The invention belongs to the field of acoustic fatigue tests, and particularly relates to a thermo-acoustic protection device and a thermo-acoustic protection method for a multi-field coupling test measurement system. The invention provides a thermoacoustic protection device for a multi-field coupling test measurement system, which can reduce or eliminate the interference of strong noise, strong vibration and high-temperature environment on the measurement system and ensure the safety and normal work of measurement equipment in the multi-field environment.
Description
Technical Field
The invention belongs to the field of acoustic fatigue tests, and particularly relates to a thermo-acoustic protection device and a thermo-acoustic protection method for a multi-field coupling test measurement system.
Background
With the rapid development of aerospace science and technology in China, various types of aircrafts with new models emerge endlessly, wherein the hypersonic aircraft is one of the most active research fields in the international aerospace field at present. Hypersonic aircrafts fly in the atmosphere at the speed which is several times of the sound speed, the surface of the hypersonic aircrafts is subjected to thermal load, pneumatic load, vibration load, noise load and the like, and the structure is exposed in increasingly severe comprehensive environments of heat, sound, vibration, silence and the like. The influence of the combined action of multiple loads on the dynamic characteristics of the structure of the hypersonic aircraft is more serious than that of a single load, and the coupling effect among different loads seriously threatens the overall safety and reliability of the structure of the hypersonic aircraft. The single load test cannot meet the development requirement of a new model, and the research work of the multi-physical-field coupling test needs to be carried out.
Under the multi-field coupling test environment, due to the complexity and the rigor of the test environment, the accuracy and the stability of the data measurement of the test system cannot be guaranteed, the aircraft under the complex service environment cannot be well examined, and the traditional measurement mode cannot meet the requirements of the test. The novel non-contact measurement technology is an important technical means for solving the problem of multi-field test environment measurement.
Disclosure of Invention
The purpose of the invention is as follows: the thermoacoustic protection device and the thermoacoustic protection method for the multi-field coupling test measurement system can reduce or eliminate the interference of strong noise, strong vibration and high-temperature environment on the measurement system, ensure the safety and normal work of measurement equipment in the multi-field coupling environment, and improve the accuracy and stability of data measurement of the measurement system.
The technical scheme of the invention is as follows: on one hand, the thermoacoustic protection device for the multi-field coupling test measurement system is provided, and comprises a protection cover and a damping bracket, wherein the protection cover is detachably connected above the damping bracket;
the protective cover comprises a front baffle, a cover body and a rear cover, wherein the front baffle, the cover body and the rear cover form a closed space surrounding the measuring equipment; the protective cover is used for performing thermal and acoustic protection on the measuring equipment;
one end of the shock absorption support supports the protective cover, and the other end of the shock absorption support is in contact with the ground of a test environment; the damping support is used for weakening the influence of the environmental vibration of the multi-field coupling test on the measuring equipment.
Further, the cover body comprises an annular cavity, one end of the annular cavity is provided with a cooling liquid inlet, and the other end of the annular cavity is provided with a cooling liquid outlet.
Further, the front baffle is provided with a high-temperature resistant lens for meeting the wavelength acquisition range when the measuring equipment is an optical measuring instrument.
Further, the shock absorption support comprises a mounting platform, a connecting flange and a base; the mounting platform is detachably connected with the protective cover; the mounting platform is connected with the base through a connecting flange.
Furthermore, dry sand is contained in the round tube of the base, so that the damping effect of the damping support is improved.
Further, the bottom of base is provided with a plurality of adjustable stabilizer blades for adjust the horizontal position of mounting platform and protection casing.
Further, the bottom of base is provided with a plurality of universal wheels.
In another aspect, a thermoacoustic protection method for a multi-field coupling test measurement system is provided, which uses the thermoacoustic protection device described above, and includes:
installing the measuring equipment into a cover body of the protective cover, and fixedly connecting the front baffle and the rear cover with the cover body through bolts respectively; connecting a cover body of the protective cover with an installation platform of a damping bracket;
adjusting the plurality of adjustable support legs to enable the mounting platform and the protective cover to be in horizontal positions;
adjust shock absorber support's flange for adjust the height of mounting platform and protection casing.
The thermoacoustic protection method further comprises the steps of introducing cooling water from a cooling liquid inlet and leading out the cooling water from a cooling liquid outlet, wherein the temperature of the cooling water at the cooling liquid inlet is not more than 35 ℃, the pressure of the cooling water is 0.1-0.2 Mpa, and the flow rate of the cooling water is 0.3-0.6L/S.
Further, the thermoacoustic protection method further comprises: a compressed air inlet is formed in the front baffle, compressed air is introduced through the compressed air inlet to cool air at the front baffle, and the temperature of the compressed air is not more than 35 ℃.
The invention has the technical effects that:
the four-field coupling test is blank in the field of the current multi-field coupling test, and the accurate test result has high requirements on the accuracy and stability of the test equipment. Compared with a non-contact measurement mode without protective measures, the thermoacoustic protection device for the multi-field coupling test measurement system provided by the invention can effectively ensure the accuracy and stability of the test equipment in the multi-field coupling test environment. The annular cavity is utilized to not only carry out thermal protection, but also isolate most of noise.
In addition, for some non-contact measuring devices with short testing distance, the environment in which the non-contact measuring devices are located is threatened due to high temperature or too much noise. According to the invention, the thermoacoustic protection device can meet the installation and use requirements of various equipment sizes, and is convenient to fix and move. Therefore, the invention can provide better protection effect for the multi-field coupling test environment, ensures the normal work of the non-contact measuring equipment in the complex test environment, and has important guiding significance for the development of the multi-field coupling test technology.
Drawings
FIG. 1 is a schematic structural view of a shield according to embodiment 1;
FIG. 2 is a schematic structural view of a shock-absorbing mount according to embodiment 1;
FIG. 3 is a schematic view of an assembly structure of the shield and the shock absorbing bracket according to embodiment 1 after being mounted.
Detailed Description
Example 1
Fig. 1 is a schematic structural diagram of a protective cover according to embodiment 1, fig. 2 is a schematic structural diagram of a shock absorbing bracket according to embodiment 1, and fig. 3 is a schematic structural diagram of an assembly structure of the protective cover and the shock absorbing bracket according to embodiment 1 after the protective cover and the shock absorbing bracket are installed, and in combination with fig. 1, fig. 2, and fig. 3, according to this embodiment, a thermoacoustic protection device 100 for a multi-field coupling test measurement system is provided, where the thermoacoustic protection device 100 includes a protective cover 10 and a shock absorbing bracket 20, and the protective cover is detachably connected above the shock absorbing bracket.
As shown in fig. 1, the protective cover 10 includes a front baffle 16, a cover body 15, and a rear cover 13, and the front baffle 16, the cover body 15, and the rear cover 13 form a closed space surrounding the measurement apparatus. The protective cover is used for performing thermal and acoustic protection on the measuring equipment.
The cover body comprises an annular cavity, one end of the annular cavity is provided with a cooling liquid inlet 12, and the other end of the annular cavity is provided with a cooling liquid outlet 11. The cover body of this embodiment is made of a double-layer standard stainless steel pipe, and has formed an annular cavity. The front baffle 16 is made of a multi-layer steel plate combined with quartz glass. The rear cover 13 is a single-layer steel plate.
Further, as shown in fig. 1, four mounting tabs are disposed on two sides of the cover 15, and are connected to the mounting bracket 14 through bolts M10. The front baffle 16, the rear cover 13 and the cover body 15 are all connected through bolts M6. The rear cover 13 is provided with an equipment outlet hole.
Further, the front baffle 16 is mounted with a high temperature resistant lens for satisfying a wavelength collection range when the measuring device is an optical measuring instrument. The high temperature resistant lens of the present embodiment is quartz glass.
As shown in fig. 2 and 3, one end of the shock absorbing bracket 20 supports the shield 10, and the other end contacts the ground of the test environment; the shock absorption bracket 20 is used for weakening the influence of the environmental vibration of the multi-field coupling test on the measuring equipment. The shock absorption bracket 20 comprises a mounting platform 21, a connecting flange 22 and a base 23; the mounting platform 21 is connected to a base 23 via a connecting flange 22. In this embodiment, the mounting platform 21 and the base barrel 230 are externally threaded with fine threads on the ends, wherein a bolt of M10 is milled out to a certain length on both ends.
The mounting platform 21 is detachably connected with the protective cover; specifically, the mounting bracket 14 is connected with the mounting platform 21, a connecting bolt hole is reserved at the bottom of the mounting bracket 14, and the mounting platform 21 is connected with the mounting bracket 14 at the bottom of the protective cover through a bolt. The height of the mounting platform 21 can be adjusted by adjusting the connecting flange 22.
The base 23 includes a bottom plate 233 and a circular tube 230, one end of the circular tube 230 is connected to the connecting flange 22, and the other end is connected to the bottom plate 233. In this embodiment, the length of the internal thread of the connecting flange 22 is 50mm inward from each of the two ports; the base circular tube 230 is a standard steel tube with the diameter of 200mm and the thickness of 5 mm. When the vibration damping support is used, dry sand is poured into the circular tube 230 of the base and is used for absorbing energy of transverse vibration generated by a sound field to the vibration damping support. A sand outlet hole is reserved at the bottom of the base plate 233 and is blocked when the device is used, and after a test is finished, the plug is opened to discharge sand, and the device is moved away. In addition, in the present embodiment, three angle-shaped reinforcing ribs are disposed on the upper surface of the base plate 233 to enhance the rigidity and strength of the whole device.
Further, a plurality of adjustable legs 231 are disposed at the bottom of the chassis 233 of the base for adjusting the horizontal position of the mounting platform 21 and the shield. The bottom of the adjustable supporting leg 231 is in contact with the ground through rubber, so that the influence of the ground environment vibration on the shock absorption support and the measuring instrument is reduced. The adjustable support leg 231 is a support leg capable of being adjusted up and down and is provided with an adjustable force application hole structure.
Further, a plurality of universal wheels are arranged at the bottom of the chassis 233 of the base; the proper universal wheels are selected to meet the requirements of weighing and moving.
Specifically, specific technical indexes of the damping bracket of a certain type of thermoacoustic protection device are taken as examples, and are shown in table 1.
TABLE 1 damping support technical index
| Density of shock-absorbing support material | 7870kg/m3 |
| Weight of shock-absorbing support | 95.664kg |
| Minimum height of shock-absorbing support | 810mm |
| Shock-absorbing supportMaximum height of shelf | About 900mm |
| Height of center of gravity (from the bottom of the leg without dry sand) | 280mm |
Example 2
In this embodiment, a thermoacoustic protection method for a multi-field coupling test measurement system is provided, where the thermoacoustic protection device is used, and the thermoacoustic protection method includes the following steps:
step 1: installing the measuring equipment into a cover body of the protective cover, and fixedly connecting the front baffle and the rear cover with the cover body through bolts respectively; connecting a cover body of the protective cover with an installation platform of a damping bracket; the front baffle of the protective cover faces the test piece to be tested.
Step 2: adjusting the height of the plurality of adjustable support legs to enable the mounting platform, the testing equipment and the protective cover to be in horizontal positions; adjusting the external threads at the two ends of the connecting flange to enable the testing equipment to be at a proper measuring height, and locking the bolts. The posture of the mounting platform is adjusted through the external threads at the lower end of the mounting platform, and the connecting flange is provided with a hole for locking and positioning; and adjusting the posture of the mounting platform to enable the light path of the measuring equipment to be aligned with the position of the measuring point.
And step 3: after the test is finished, the adjustable supporting legs at the bottom are rotated, so that the universal wheels are grounded and moved.
And in the step 2, cooling water is introduced from a cooling liquid inlet and is led out from a cooling liquid outlet, the temperature of the cooling water at the cooling liquid inlet is not more than 35 ℃, the pressure of the cooling water is 0.1-0.2 Mpa, the flow of the cooling water is 0.3-0.6L/S, and the water flows out of a water outlet through an interlayer so as to achieve the cooling effect.
In addition, this embodiment sets up compressed air inlet at the baffle before, lets in compressed air through compressed air inlet to the air of cooling baffle department before, compressed air temperature is not more than 35 degrees centigrade. In the embodiment, the compressed air is introduced to cool the air at the front gear, so that the influence of the air at the front end of the measuring instrument on a measuring light path due to overhigh temperature is prevented.
Taking a certain test as an example, the specific technical indexes are shown in table 2:
TABLE 2 technical indices
Claims (10)
1. A thermoacoustic protection device for a multi-field coupling test is characterized by comprising a protection cover and a damping bracket, wherein the protection cover is detachably connected above the damping bracket;
the protective cover comprises a front baffle, a cover body and a rear cover, wherein the front baffle, the cover body and the rear cover form a closed space surrounding the measuring equipment; the protective cover is used for performing thermal and acoustic protection on the measuring equipment;
one end of the shock absorption support supports the protective cover, and the other end of the shock absorption support is in contact with the ground of a test environment; the damping support is used for weakening vibration of the multi-field coupling test environment to the measuring equipment.
2. The thermoacoustic protector according to claim 1, wherein the cover comprises an annular cavity, one end of which is provided with a coolant inlet and the other end of which is provided with a coolant outlet.
3. The thermoacoustic protector according to claim 1, wherein the front baffle is fitted with a high temperature resistant lens for meeting the wavelength acquisition range when the measuring device is an optical measuring instrument.
4. The thermoacoustic protector according to claim 1, wherein the shock mount comprises a mounting platform, a connecting flange, and a base; the mounting platform is detachably connected with the protective cover; the mounting platform is connected with the base through a connecting flange.
5. The thermoacoustic protector according to claim 4, wherein the base has dry sand contained within a circular tube for absorbing energy of lateral vibrations of the shock mount caused by the sound field.
6. The thermoacoustic protection device according to claim 4, wherein the bottom end of the base is provided with a plurality of adjustable legs for adjusting the horizontal position of the mounting platform and the protective cover.
7. The thermoacoustic protector according to claim 6, wherein the bottom end of the base is provided with a plurality of universal wheels.
8. A thermoacoustic protection method for multi-field coupling testing, using the thermoacoustic protection device according to any one of claims 1 to 7, characterized in that the thermoacoustic protection method comprises:
installing the measuring equipment into a cover body of the protective cover, and fixedly connecting the front baffle and the rear cover with the cover body through bolts respectively; connecting a cover body of the protective cover with an installation platform of a damping bracket;
adjusting the plurality of adjustable support legs to enable the mounting platform and the protective cover to be in horizontal positions;
adjust shock absorber support's flange for adjust the height of mounting platform and protection casing.
9. The thermoacoustic protection method according to claim 8, further comprising introducing cooling water from a cooling liquid inlet and discharging the cooling water from a cooling liquid outlet, wherein the temperature of the cooling water at the cooling liquid inlet is not more than 35 ℃, the pressure of the cooling water is 0.1-0.2 MPa, and the flow rate of the cooling water is 0.3-0.6L/S.
10. The thermoacoustic protection method according to claim 8, further comprising: and a compressed air inlet is formed in the front baffle plate, and compressed air is introduced through the compressed air inlet so as to cool the air at the front baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362772.5A CN111398148A (en) | 2020-04-30 | 2020-04-30 | Thermo-acoustic protection device and thermo-acoustic protection method for multi-field coupling test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010362772.5A CN111398148A (en) | 2020-04-30 | 2020-04-30 | Thermo-acoustic protection device and thermo-acoustic protection method for multi-field coupling test |
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| CN111398148A true CN111398148A (en) | 2020-07-10 |
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