CN211954712U - Thermal analysis test bed of composite damping vibration reduction scientific experiment cabinet - Google Patents
Thermal analysis test bed of composite damping vibration reduction scientific experiment cabinet Download PDFInfo
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- CN211954712U CN211954712U CN202020773702.4U CN202020773702U CN211954712U CN 211954712 U CN211954712 U CN 211954712U CN 202020773702 U CN202020773702 U CN 202020773702U CN 211954712 U CN211954712 U CN 211954712U
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- damping vibration
- vibration attenuation
- composite damping
- scientific experiment
- experiment cabinet
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Abstract
The utility model relates to the field of aerospace composite damping vibration attenuation design, in particular to a thermal analysis test bed of a composite damping vibration attenuation scientific experimental cabinet, which comprises a base, a tooling fixture, an ignition system and a heat insulation temperature measurement system, wherein the tooling fixture is arranged on the base and is used for fixing the composite damping vibration attenuation scientific experimental cabinet to be tested; the ignition system is used for realizing temperature control of the environment where the composite damping vibration attenuation scientific experiment cabinet is located; the heat insulation and temperature measurement system is used for providing a closed environment for the composite damping vibration attenuation scientific experiment cabinet to be tested and testing the temperature of the closed environment. The utility model discloses not only can test compound damping vibration attenuation scientific experiment cabinet under the constant temperature, can also carry out inherent characteristic test, the true experimental operating mode of simulation to compound damping vibration attenuation scientific experiment cabinet under the inhomogeneous distribution environment of temperature.
Description
Technical Field
The utility model relates to an aerospace composite damping vibration attenuation design technical field, in particular to composite damping vibration attenuation scientific experiment cabinet thermal analysis test bench.
Background
The space station develops various scientific experiments under microgravity and interference-free environment, and the carrier of the scientific experimental device is the scientific experimental cabinet. Space science load is installed inside the scientific experiment cabinet, and the astronaut develops the scientific experiment research of different grade type. The rocket is affected by severe vibration impact in the processes of rocket launching, butt joint and orbit change. Due to the particularity of the scientific experiment cabinet, the target structure cannot be changed. Therefore, a passive vibration damping method is selected, and the composite damping material is laid to achieve the expected vibration damping effect. However, the composite damping has a temperature-frequency characteristic, that is, the frequency changes with the temperature change, which causes inaccurate analysis of the inherent characteristic of the composite damping vibration attenuation scientific experimental cabinet in the actual test process.
Therefore, the method has important significance for the research of the thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet. In order to achieve the above objective, a test bed for analyzing the inherent characteristic test of the composite damping vibration attenuation scientific experiment cabinet under the constant temperature environment and the variable temperature environment is urgently needed.
SUMMERY OF THE UTILITY MODEL
To the above problem, an object of the utility model is to provide a thermal analysis test bench of compound damping vibration attenuation scientific experiment cabinet can realize under the invariable environment of analysis temperature, under the alternating temperature environment the measurement of compound damping vibration attenuation scientific experiment cabinet inherent characteristic.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a thermal analysis test bench for a composite damping vibration attenuation scientific experiment cabinet comprises:
a base;
the fixture is arranged on the base and used for fixing the composite damping vibration attenuation scientific experiment cabinet to be tested;
the ignition system is used for realizing temperature control of the environment where the composite damping vibration attenuation scientific experiment cabinet is located;
the heat insulation and temperature measurement system is used for providing a closed environment for the composite damping vibration attenuation scientific experiment cabinet to be tested and testing the temperature of the closed environment.
The ignition system comprises a gas tank and a flame gun connected with the gas tank, wherein the flame gun is used for providing a fire source for a closed environment where the composite damping vibration reduction scientific experiment cabinet is located, and the flame temperature is controllable.
The ignition systems are four groups and are uniformly distributed on two sides of the base.
The thermal insulation temperature measurement system comprises a thermal insulation cover and an infrared thermometer arranged on the thermal insulation cover, wherein the thermal insulation cover is arranged on the outer side of the composite damping vibration attenuation scientific experiment cabinet and is connected with the base, and the infrared thermometer is used for testing the temperature of the inner side of the thermal insulation cover.
The infrared thermometers are multiple and arranged at the top of the heat shield, and an acceleration sensor is arranged on the side wall of the heat shield.
The two sides of the bottom of the heat shield are provided with heat shield connecting parts used for being connected with the base; and ignition mounting holes and acceleration sensor mounting holes are formed in two side walls of the heat insulation cover.
The fixture comprises a left fixture body and a right fixture body, the left fixture body and the right fixture body are identical in structure and respectively comprise a fixture bottom plate, a side plate and a vertical plate, and the fixture bottom plate is connected with the base; the vertical plate is vertically connected with the clamp bottom plate and is used for limiting the composite damping vibration attenuation scientific experiment cabinet in the length direction; and side plates are arranged on two sides of the vertical plate and used for limiting the width direction of the composite damping vibration attenuation scientific experiment cabinet.
A plurality of reinforcing ribs are connected between the vertical plate and the clamp bottom plate; and the side plate is provided with a lightening hole.
The composite damping vibration attenuation scientific experiment cabinet comprises a scientific experiment cabinet body, and a composite damping layer and a constraint layer which are arranged on the outer surface of the scientific experiment cabinet body, wherein the constraint layer is positioned on the outer side of the composite damping layer.
The composite damping layer is made of rubber materials; the restraint layer is an aluminum plate.
The utility model has the advantages and beneficial effects that:
1. the utility model discloses a compound damping vibration attenuation science experiment cabinet thermal analysis test bench, steerable structural system thermal environment temperature constancy avoids the influence of compound damping material temperature frequency characteristic to the inherent characteristic test of structural system, improves experimental measuring accuracy.
2. The utility model discloses a compound damping vibration attenuation scientific experiment cabinet thermal analysis test bench, steerable structural system are under the alternating temperature condition to the influence of the temperature frequency characteristic of probing damping material to compound damping vibration attenuation scientific experiment cabinet inherent characteristic can simulate real operating mode.
Drawings
FIG. 1 is one of the structural schematic diagrams of the thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet of the utility model;
FIG. 2 is a second schematic structural view of the thermal analysis test bed of the composite damping vibration-damping scientific experimental cabinet of the present invention;
FIG. 3 is a schematic structural diagram of the composite damping vibration attenuation scientific experimental cabinet installed in the thermal analysis test bed of the composite damping vibration attenuation scientific experimental cabinet of the utility model;
fig. 4 is a schematic structural diagram of the ignition system of the present invention;
FIG. 5 is a schematic structural view of the thermal insulation testing system of the present invention;
fig. 6 is a schematic structural view of the middle tool holder of the present invention;
fig. 7 is the structure schematic diagram of the middle composite damping vibration attenuation scientific experimental cabinet of the utility model.
In the figure: a is an ignition system; b is a heat insulation temperature measurement system; c is a composite damping vibration attenuation scientific experiment cabinet; 1 is a base; 2, a tool clamp; 21 is a clamp bottom plate; 22 is a reinforcing rib; 23 is a side plate; 24 is a vertical plate; 3 is a scientific experimental cabinet body; 4 is a composite damping layer; 5 is a constraint layer; 6 is a gas tank; 7 is a flame gun; 8 is a heat shield; 81 is a heat shield connection; 82 is an ignition mounting hole; 9 is an infrared thermometer; and 10 is an acceleration sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and fig. 3, the utility model provides a thermal analysis test bed for a composite damping vibration attenuation scientific experimental cabinet, which comprises a base 1, a tooling fixture 2, an ignition system a and a heat insulation temperature measurement system B, wherein the tooling fixture 2 is arranged on the base 1 and is used for fixing a composite damping vibration attenuation scientific experimental cabinet C to be tested; the ignition system A is used for realizing temperature control of the environment where the composite damping vibration attenuation scientific experiment cabinet C is located; the heat insulation temperature measurement system B is used for providing a closed environment for the composite damping vibration attenuation scientific experiment cabinet C to be tested and testing the temperature of the closed environment.
As shown in fig. 2 and 4, in the embodiment of the present invention, the ignition system a includes a gas tank 6 and a flame gun 7 connected to the gas tank 6, the flame gun 7 is used for providing a fire source to the closed environment where the compound damping vibration reduction scientific experiment cabinet C is located, and the flame temperature is controllable.
Specifically, in this embodiment, the ignition systems a are four groups and are uniformly distributed on two sides of the base 1, so as to accurately control the temperature environment of the composite damping vibration attenuation scientific experiment cabinet C. Wherein, the flame gun 7 is provided with an air valve device which can control the flame temperature. The gas tank 6 is a replaceable clean energy source, and a fire extinguishing device is arranged in the ignition system A to ensure the safety of the ignition system A.
As shown in fig. 2, in the embodiment of the present invention, the thermal insulation temperature measurement system B includes a thermal shield 8 and an infrared thermometer 9 disposed on the thermal shield 8, wherein the thermal shield 8 is disposed outside the composite damping vibration reduction scientific experiment cabinet C and connected to the base 1, and the infrared thermometer 9 is used for testing the temperature inside the thermal shield 8.
Further, an acceleration sensor 10 is provided on a side wall of the heat shield 8.
Specifically, the infrared thermometers 9 are multiple and are arranged on the top of the heat shield 8; two acceleration sensors 10 are arranged on two side walls of the heat shield 8.
As shown in fig. 5, in the embodiment of the present invention, the heat shield 8 is provided with a heat shield connecting portion 81 for connecting with the base 1 on both sides of the bottom, a connecting hole is provided on the heat shield connecting portion 81, and the heat shield 8 can move horizontally and vertically at the connecting hole by being connected with the base 1 through a bolt. Two ignition mounting holes 82 and two acceleration sensor mounting holes are formed in two side walls of the heat shield 8. Five round holes are formed above the heat shield 8 and used for mounting an infrared thermometer 9, and the infrared thermometer 9 can measure the temperature environment of the composite damping vibration attenuation scientific experiment cabinet structure through infrared rays emitted by a sensor probe.
The tooling clamp 2 comprises a left clamp body and a right clamp body, wherein the left clamp body and the right clamp body are respectively arranged at two ends of the composite damping vibration attenuation scientific experiment cabinet C and limit the composite damping vibration attenuation scientific experiment cabinet C.
As shown in fig. 6, the left clamp body and the right clamp body have the same structure and both comprise a clamp bottom plate 21, a side plate 23 and a vertical plate 24, wherein the clamp bottom plate 21 is provided with a through hole, and the through hole is connected with the base 1 through a bolt; the vertical plate 24 is vertically connected with the clamp bottom plate 21, and the vertical plate 24 is used for limiting the length direction of the composite damping vibration attenuation scientific experiment cabinet C; and side plates 23 are arranged on two sides of the vertical plate 24, and the side plates 23 are used for limiting the width direction of the composite damping vibration attenuation scientific experiment cabinet C.
Further, a plurality of reinforcing ribs 22 are connected between the vertical plate 24 and the clamp bottom plate 21, and play a role of fixing and supporting the clamp. The side plates 23 are provided with lightening holes for the purpose of lightening the weight of the tool.
As shown in fig. 7, the compound damping vibration attenuation scientific experiment cabinet C comprises a scientific experiment cabinet body 3, and a compound damping layer 4 and a constrained layer 5 which are arranged on the outer surface of the scientific experiment cabinet body 3, wherein the constrained layer 5 is positioned on the outer side of the compound damping layer 4. Compared with a free damping structure without a constrained layer, the constrained damping structure added with the constrained layer has larger shearing deformation and absorbs energy more, so that the expected vibration reduction target is achieved.
In the embodiment of the utility model, the composite damping layer 4 is made of rubber material; the constraining layer 5 is an aluminum plate.
Specifically, a plurality of foundation bolts are installed on the base 1 and used for fixing the tool clamp 2 and the heat shield 8, and the tool clamp 2 and the heat shield 8 can be changed in position along with the size of the test piece.
The method is characterized by comprising the following steps of preparing a previous stage, and then measuring the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet, wherein the measurement is used for measuring the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet at constant temperature and in variable temperature environment, and the specific steps are as follows:
1) and measuring the inherent characteristics of the composite damping vibration attenuation scientific experimental cabinet under the constant control temperature.
Firstly, four ignition systems A are respectively installed at the ignition installation holes 82 of the heat shield 8, and the connection condition of the flame projecting gun 7 and the gas tank 6 is checked after the installation is finished, so that the installation is ensured to be correct.
Secondly, acceleration sensors 10 are respectively adhered to the acceleration sensor mounting holes on the two sides of the heat shield 8, and the plane of the acceleration sensor 10 is horizontally connected with the surface of the cabinet body of the composite damping vibration attenuation scientific experiment cabinet C through glue. An infrared thermometer 9 is opened above the heat shield 8. And then, starting the ignition system A, adjusting the air valve to a first gear, controlling the temperature to be in a constant state, and testing the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet C.
2) And (3) testing the inherent characteristics of the composite damping vibration attenuation scientific experimental cabinet in an environment with uneven temperature distribution.
Firstly, four ignition systems A are respectively installed at the ignition installation holes 82 of the heat shield 8, and the connection condition of the flame projecting gun 7 and the gas tank 6 is checked after the installation is finished, so that the installation is ensured to be correct.
Secondly, acceleration sensors 10 are respectively adhered to acceleration sensor mounting holes on two sides of the heat shield 8, and the plane of the acceleration sensor mounting holes is horizontally connected with the surface of the cabinet body of the composite damping vibration attenuation scientific experiment cabinet C through glue. An infrared thermometer 9 is opened above the heat shield 8. Then, an ignition system A is started, the air valve is adjusted to first, second, third and fourth gears respectively, the temperature indication number of the infrared thermometer 9 is observed, the temperature range is controlled, and finally the inherent characteristic of the composite damping vibration attenuation scientific experiment cabinet C is tested.
The utility model discloses a test bench not only can test compound damping vibration attenuation scientific experiment cabinet under constant temperature, can also carry out inherent characteristic test to compound damping vibration attenuation scientific experiment cabinet under the inhomogeneous distribution environment of temperature, and the true experimental operating mode of simulation provides the vibration input power through the external excitation in whole experimentation.
In the implementation of the utility model, the ignition system A adopts a Robin Han ignition device, and the heating temperature of the composite damping vibration attenuation scientific experimental cabinet can be accurately controlled; the size of firepower can be controlled by adjusting the air valve of the igniter, and then the composite damping vibration attenuation scientific experiment cabinet is heated in different temperature ranges. The mechanical property of considering damping material changes along with the temperature, the utility model discloses not only can test compound damping vibration attenuation scientific experiment cabinet under the constant temperature, can also carry out inherent characteristic test, the true experimental operating mode of simulation to compound damping vibration attenuation scientific experiment cabinet under the inhomogeneous distribution environment of temperature.
The above description is only for the embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, extension, etc. made within the spirit and principle of the present invention are all included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a compound damping vibration attenuation science laboratory cabinet thermal analysis test bench which characterized in that includes:
a base (1);
the fixture (2) is arranged on the base (1) and used for fixing a composite damping vibration attenuation scientific experiment cabinet (C) to be tested;
the ignition system (A) is used for realizing temperature control of the environment where the composite damping vibration attenuation scientific experiment cabinet (C) is located;
and the heat insulation and temperature measurement system (B) is used for providing a closed environment for the composite damping vibration attenuation scientific experiment cabinet (C) to be tested and testing the temperature of the closed environment.
2. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 1, characterized in that the ignition system (A) comprises a gas tank (6) and a flame gun (7) connected with the gas tank (6), the flame gun (7) is used for providing a fire source for the closed environment where the composite damping vibration attenuation scientific experiment cabinet (C) is located, and the flame temperature is controllable.
3. The compound damping vibration attenuation scientific laboratory cabinet thermal analysis test bed according to claim 1 or 2, characterized in that the ignition systems (A) are four groups and are evenly distributed on two sides of the base (1).
4. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 1, characterized in that the thermal insulation temperature measurement system (B) comprises a thermal insulation cover (8) and an infrared thermometer (9) arranged on the thermal insulation cover (8), wherein the thermal insulation cover (8) is arranged on the outer side of the composite damping vibration attenuation scientific experiment cabinet (C) and is connected with the base (1), and the infrared thermometer (9) is used for testing the temperature of the inner side of the thermal insulation cover (8).
5. The compound damping vibration attenuation scientific laboratory cabinet thermal analysis test bed according to claim 4, characterized in that the infrared thermometers (9) are multiple and arranged on the top of the heat shield (8), and the side wall of the heat shield (8) is provided with an acceleration sensor (10).
6. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 5, characterized in that heat insulation cover connecting parts (81) used for being connected with the base (1) are arranged on two sides of the bottom of the heat insulation cover (8); and ignition mounting holes (82) and acceleration sensor mounting holes are formed in two side walls of the heat insulation cover (8).
7. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 1, characterized in that the tooling fixture (2) comprises a left fixture body and a right fixture body, the left fixture body and the right fixture body have the same structure and respectively comprise a fixture bottom plate (21), a side plate (23) and a vertical plate (24), wherein the fixture bottom plate (21) is connected with the base (1); the vertical plate (24) is vertically connected with the clamp bottom plate (21), and the vertical plate (24) is used for limiting the composite damping vibration attenuation scientific experiment cabinet (C) in the length direction; and side plates (23) are arranged on two sides of the vertical plate (24), and the side plates (23) are used for limiting the width direction of the composite damping vibration attenuation scientific experiment cabinet (C).
8. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 7, characterized in that a plurality of reinforcing ribs (22) are connected between the vertical plate (24) and the clamp bottom plate (21); the side plate (23) is provided with a lightening hole.
9. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 1, characterized in that the composite damping vibration attenuation scientific experiment cabinet (C) comprises a scientific experiment cabinet body (3), and a composite damping layer (4) and a constraint layer (5) which are arranged on the outer surface of the scientific experiment cabinet body (3), wherein the constraint layer (5) is positioned on the outer side of the composite damping layer (4).
10. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet according to claim 9, characterized in that the composite damping layer (4) is made of rubber material; the constraint layer (5) is an aluminum plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020773702.4U CN211954712U (en) | 2020-05-12 | 2020-05-12 | Thermal analysis test bed of composite damping vibration reduction scientific experiment cabinet |
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| CN202020773702.4U CN211954712U (en) | 2020-05-12 | 2020-05-12 | Thermal analysis test bed of composite damping vibration reduction scientific experiment cabinet |
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| CN211954712U true CN211954712U (en) | 2020-11-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473985A (en) * | 2020-05-12 | 2020-07-31 | 中国科学院沈阳自动化研究所 | Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet |
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- 2020-05-12 CN CN202020773702.4U patent/CN211954712U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111473985A (en) * | 2020-05-12 | 2020-07-31 | 中国科学院沈阳自动化研究所 | Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet |
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Granted publication date: 20201117 |