CN218368361U - High-temperature-static force-vibration load combined loading device for thermal protection structure - Google Patents
High-temperature-static force-vibration load combined loading device for thermal protection structure Download PDFInfo
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- CN218368361U CN218368361U CN202222629950.3U CN202222629950U CN218368361U CN 218368361 U CN218368361 U CN 218368361U CN 202222629950 U CN202222629950 U CN 202222629950U CN 218368361 U CN218368361 U CN 218368361U
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Abstract
The utility model relates to a hot protective structure high temperature-quiet power-vibration load combined loading device, include: the vibration table is used for applying vibration load to the test piece on the table top; the at least one group of clamps are arranged on the vibration table and used for fixing the test piece; the static loading device is arranged on the vibration table and used for applying static load to the test piece; and the high-temperature loading device is arranged above the vibration table and used for thermally radiating the test piece to apply heat flow load. The utility model discloses a vibration loading device exerts the excitation of vibration at random to hot protective structure test piece, exerts quiet power load to hot protective structure test piece through quiet power loading device, exerts the thermal current load to hot protective structure test piece through high temperature loading device, can satisfy the requirement that high temperature, quiet power, three field of vibration loads acted on simultaneously in the engineering.
Description
Technical Field
The utility model belongs to the technical field of the experimental technique of structural dynamics and specifically relates to a hot protective structure high temperature-quiet power-vibration load combined loading device.
Background
The surface thermal protection structure of a new generation of hypersonic aircraft is subjected to the combined action of severe aerodynamic heat, aerodynamic force and mechanical vibration load in the cruising service process, so that the thermal protection structure is easily damaged or even fails, the safety performance of the aircraft is seriously threatened, and therefore the performance of the thermal protection structure under the high-temperature-static force-vibration load combined loading condition needs to be examined through tests.
Although the current wind tunnel test can better simulate a multi-field load environment, the current wind tunnel test has the defects of high price, complex process and the like, and is not suitable for quick examination of different design schemes of a thermal protection structure. The existing multi-field load combined loading device for the thermal protection structure only comprises two loads, namely high-temperature static force or high-temperature vibration and the like, and cannot truly reflect the actual loading condition of the thermal protection structure. Therefore, a high-temperature-static-vibration load combined loading device for a thermal protection structure is needed, and is used for researching the response characteristics and safety performance of the thermal protection structure in a real service environment.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to the not enough of prior art, the utility model provides a hot protective structure high temperature-quiet power-vibration load unites loading method and device, the purpose realizes that high temperature-quiet power-vibration load unites to apply and experimental study to improve the degree of accuracy to the simulation of the loaded condition.
The utility model adopts the technical scheme as follows:
a combined high-temperature-static-vibration load loading device for a thermal protection structure comprises:
the vibration table is used for applying vibration load to the test piece on the table top;
at least one group of clamps arranged on the vibration table and used for fixing the test piece;
the static loading device is arranged on the vibration table and is used for applying static load to the test piece;
and the high-temperature loading device is arranged above the vibration table and used for thermally radiating the test piece to apply heat flow load.
The further technical scheme is as follows:
the vibration table is mechanically connected with the output end of the electromagnetic system to receive vibration excitation output by the electromagnetic system, an accelerometer is arranged on the vibration table, and the accelerometer is connected with a control module of the electromagnetic system through an electric signal.
The static loading device has the structure that: including horizontal migration platform, spring and connection rope, spring one end with the horizontal migration platform links to each other, the spring other end with it links to each other to connect rope one end, connects the rope other end and is the free end for link to each other with the test piece.
And the test piece is provided with a connecting hole for connecting with the free end of the connecting rope through a bolt with a hole.
The structure of the high-temperature loading device is as follows: the test device comprises a quartz lamp tube, a thermocouple and a temperature control system, wherein the thermocouple is used for collecting temperature signals of the surface of a test piece, the signal output end of the thermocouple is connected with the signal input end of the temperature control system, and the signal output end of the temperature control system is connected with the signal input end of the quartz lamp tube.
The material of the at least one group of clamps is high-temperature alloy, and the natural frequency is greater than the frequency of the random vibration spectrum of the test piece.
The at least one group of clamps and the static loading device are detachably connected with the vibrating table respectively.
The test piece is of a thermal protection structure.
The beneficial effects of the utility model are as follows:
the utility model discloses the device can realize the joint loading to the multiple load of the high temperature of hot protective structure, quiet power and vibration, makes the test condition accord with real environmental condition more, has improved the degree of accuracy of the experimental load condition simulation that receives of hot protective structure. And an accurate test basis is provided for the follow-up research of the response characteristics and the safety performance of the thermal protection structure in a real service environment.
The utility model discloses can adjust the direction of the load that receives, convenient operation, the commonality is strong, and the reliability is high.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention.
Drawings
Fig. 1 is a schematic view of the overall structure of the embodiment of the present invention.
Fig. 2 is a schematic view of an installation structure of a vibration table according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the static force loading device according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a high temperature loading device according to an embodiment of the present invention.
In the figure: 1. a vibration table; 2. a clamp; 3. a thick screw; 4. a test piece; 5. a gasket; 6. a thin screw; 7. a bolt with a hole; 8. a static loading device; 9. a high temperature loading device; 10. an accelerometer; 11. a control module; 12. an electromagnetic system; 13. Connecting ropes; 14. a spring; 15. a cooling water tank; 16. a quartz lamp tube; 17. a thermocouple; 18. a temperature control system; 19. a lead screw; 20. a nut; 21. a horizontal moving stage; 22. a base; 23. a bearing; 24. a handwheel.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Referring to fig. 1, the high-temperature-static-vibration load combined loading device for the thermal protection structure of the embodiment includes:
the vibration table 1 is used for applying vibration load to the test piece 4 on the table top;
the at least one group of clamps 2 are arranged on the vibration table 1 and used for fixing the test piece 4;
the static loading device 8 is arranged on the vibration table 1 and is used for applying static load to the test piece 4;
and the high-temperature loading device 9 is arranged above the vibration table 1 and is used for carrying out heat radiation on the test piece 4 so as to apply heat flow load.
Referring to fig. 1, at least one set of clamps 2 is made of a high temperature alloy to effectively withstand the high temperature environment of the test process for a long time, and the natural frequency of the clamps 2 is greater than the frequency of the random vibration spectrum of the test piece 4. Thereby avoiding dynamic test errors due to clamp resonance.
When clamping the test piece 4, at least one group of clamps 2 is clamped at two ends of the test piece 4 so as to apply corresponding boundary conditions. A spacer 5 can be placed on the side of the test piece 4 and fixed to at least one set of clamps 2 by means of a thin screw 6.
At least one group of clamps 2 and static loading devices 8 are respectively detachably connected with the vibration table 1. In particular, a thick screw 3 can be used for the connection.
Referring to fig. 2, the vibration table 1 is mechanically connected to an output end of the electromagnetic system 12 to receive vibration excitation output by the electromagnetic system 12, an accelerometer 10 is disposed on the vibration table 1, and the accelerometer 10 is electrically connected to a control module 11 of the electromagnetic system 12.
Specifically, the electromagnetic system is used as a driving device, the driving rod at the output end is mechanically connected with the vibration table 1, the vibration table 1 is driven through the electromagnetic system 12, and basic vibration excitation is applied to a test piece on the table top. The accelerometer 10, the control module 11 and the electromagnetic system 12 perform information interaction through electric signals, and the accelerometer 10 can receive actual vibration signals and feed back the actual vibration signals to the control module 11 for signal compensation, so that accurate vibration load loading is realized.
The electromagnetic system 12 is also provided with a cooling water system, and the electromagnetic system 12 is connected with a cooling water tank 15 through a cooling water pipeline.
Referring to fig. 3, the static loading device 8 has the structure: including horizontal migration platform 21, spring 14 and connection rope 13, spring 14 one end links to each other with horizontal migration platform 21, and the spring 14 other end links to each other with connecting rope 13 one end, connects the rope 13 other end and is the free end for link to each other with test piece 4.
Specifically, the driving mechanism of the horizontal moving stage 21 may adopt a lead screw and nut mechanism, and the specific structure may be as follows: the vibration table comprises a base 22, wherein the base 22 is fixedly arranged on the vibration table 1, a lead screw 19 is arranged in the base 22, a nut 20 is screwed on the lead screw 19, the nut 20 is connected with a horizontal moving table 21, and the end part of the lead screw 19 is connected with a hand wheel 24 through a bearing 23. The nut 20 can be driven to move along the screw rod 19 by shaking the hand wheel 24, and the horizontal moving platform 21 is driven to linearly move along the horizontal direction, so that the tension of the connecting rope 13 is adjusted, and the static load loaded on the test piece 4 is changed.
Wherein, add tension spring 14 between connecting rope 13 and horizontal mobile station 21, can guarantee through the flexible of tension spring 14 that static load can not released in the vibration process.
Specifically, referring to fig. 1, the test piece 4 is provided with a connection hole for connecting with the free end of the connection rope 13 through the holed bolt 7.
Specifically, the connecting rope 13 is preferably a steel wire rope.
Referring to fig. 4, the structure of the high-temperature loading device 9 is: the device comprises a quartz lamp tube 16, a thermocouple 17 and a temperature control system 18, wherein the thermocouple 17 is used for collecting temperature signals of the surface of a test piece 4, the signal output end of the thermocouple 17 is connected with the signal input end of the temperature control system 18, and the signal output end of the temperature control system 18 is connected with the signal input end of the quartz lamp tube 16.
The quartz lamp tube 16 can apply a thermal load to the test piece 4 by means of thermal radiation. The temperature control system 18 adopts a planned temperature time-course curve at the initial stage, receives an electric signal fed back by the thermocouple 17 in the loading process to obtain an actual temperature time-course curve, and controls the temperature of the quartz lamp tube 16 by increasing and decreasing the output power to realize the accurate loading of the heat load.
The quartz tubes 16 are preferably distributed in an array. Is arranged above the vibration table 1 in a suspension mode and is aligned with the test piece 4 during testing.
In the above embodiment, the test piece 4 is a thermal protection structure, and includes an upper panel, a lower panel, a thermal insulation layer, a glue layer, and a metal skin.
The specific method for performing the combined loading by using the device of the embodiment is as follows:
the operation sequence of each loading device is as follows: high temperature loading, static loading and vibration loading. Firstly, a heat source (quartz lamp tube) of a high-temperature loading device applies heat flow load to a structural member in a heat radiation mode, and static load is applied through a static loading device after the temperature requirement set in a test is met, so that the influence of thermal deformation on the static loading can be eliminated through the loading sequence. And finally, applying a vibration load to the thermal protection structure through a vibration loading device (a vibration table) to finish high-temperature-static force-vibration load combined loading.
As can be understood by those skilled in the art, by changing the positions of the clamp, the static force loading device and the high temperature loading device, the structural deformation and the vibration deformation in multiple directions can be controlled, and the single loading direction is avoided.
Those of ordinary skill in the art will understand that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described above, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A combined high-temperature-static-vibration load loading device for a thermal protection structure is characterized by comprising:
the vibration table (1) is used for applying vibration load to a test piece (4) on the table top of the vibration table;
at least one group of clamps (2) arranged on the vibration table (1) and used for fixing the test piece (4);
the static loading device (8) is arranged on the vibration table (1) and is used for applying static load to the test piece (4);
and the high-temperature loading device (9) is arranged above the vibration table (1) and is used for carrying out heat radiation on the test piece (4) so as to apply heat flow load.
2. The combined high-temperature-static-vibration load loading device for the thermal protection structure according to claim 1, characterized in that the vibration table (1) is mechanically connected with an output end of an electromagnetic system (12) to receive vibration excitation output by the electromagnetic system (12), an accelerometer (10) is arranged on the vibration table (1), and the accelerometer (10) is electrically connected with a control module (11) of the electromagnetic system (12).
3. A combined high temperature-static-vibratory load loading unit of a thermal protection structure according to claim 1, characterized in that the static loading unit (8) is structured as follows: including horizontal migration platform (21), spring (14) and connection rope (13), spring (14) one end with horizontal migration platform (21) link to each other, spring (14) other end with it links to each other to connect rope (13) one end, connects rope (13) other end and is the free end for link to each other with testpieces (4).
4. A combined high-temperature-static-vibration load loading device for a thermal protection structure according to claim 3, characterized in that the test piece (4) is provided with a connecting hole for connecting with the free end of the connecting rope (13) through a bolt (7) with a hole.
5. A combined high temperature-static-vibration load loading device for a thermal protection structure according to claim 1, wherein the structure of the high temperature loading device (9) is as follows: the device comprises a quartz lamp tube (16), a thermocouple (17) and a temperature control system (18), wherein the thermocouple (17) is used for collecting temperature signals on the surface of a test piece (4), the signal output end of the thermocouple (17) is connected with the signal input end of the temperature control system (18), and the signal output end of the temperature control system (18) is connected with the signal input end of the quartz lamp tube (16).
6. The combined high-temperature-static-vibration load loading device of the thermal protection structure according to claim 1, characterized in that the material of the at least one set of clamps (2) is a high-temperature alloy, and the natural frequency is greater than the frequency of the random vibration spectrum of the test piece (4).
7. The combined high-temperature-static-vibration load loading device of a thermal protection structure according to claim 1, characterized in that the at least one group of clamps (2) and the static loading device (8) are respectively detachably connected with the vibration table (1).
8. The combined high-temperature-static-vibration load loading device of a thermal protection structure according to claim 1, wherein the test piece (4) is a thermal protection structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222629950.3U CN218368361U (en) | 2022-10-08 | 2022-10-08 | High-temperature-static force-vibration load combined loading device for thermal protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222629950.3U CN218368361U (en) | 2022-10-08 | 2022-10-08 | High-temperature-static force-vibration load combined loading device for thermal protection structure |
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| Publication Number | Publication Date |
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| CN218368361U true CN218368361U (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222629950.3U Active CN218368361U (en) | 2022-10-08 | 2022-10-08 | High-temperature-static force-vibration load combined loading device for thermal protection structure |
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| CN (1) | CN218368361U (en) |
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2022
- 2022-10-08 CN CN202222629950.3U patent/CN218368361U/en active Active
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