CN111473985A - Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet - Google Patents
Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet Download PDFInfo
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- CN111473985A CN111473985A CN202010395800.3A CN202010395800A CN111473985A CN 111473985 A CN111473985 A CN 111473985A CN 202010395800 A CN202010395800 A CN 202010395800A CN 111473985 A CN111473985 A CN 111473985A
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- 238000013016 damping Methods 0.000 title claims abstract description 99
- 239000002131 composite material Substances 0.000 title claims abstract description 86
- 238000002474 experimental method Methods 0.000 title claims abstract description 77
- 238000012360 testing method Methods 0.000 title claims abstract description 45
- 238000002076 thermal analysis method Methods 0.000 title claims abstract description 23
- 238000009413 insulation Methods 0.000 claims abstract description 27
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 10
- 230000001133 acceleration Effects 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000005486 microgravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- General Physics & Mathematics (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention 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 tool clamp, an ignition system and a heat insulation temperature measurement system, wherein the tool clamp 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 invention can test the composite damping vibration attenuation scientific experiment cabinet at constant temperature, and can also test the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet in the environment with uneven temperature distribution to simulate real experiment working conditions.
Description
Technical Field
The invention relates to the technical field of aerospace composite damping vibration attenuation design, in particular to a thermal analysis test bed of a composite damping vibration attenuation scientific experiment cabinet.
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.
Disclosure of Invention
In view of the above problems, the present invention provides a thermal analysis test bed for a composite damping vibration attenuation scientific experiment cabinet, which can realize the measurement of the intrinsic characteristics of the composite damping vibration attenuation scientific experiment cabinet under the environment of constant temperature and the environment of variable temperature.
In order to achieve the purpose, the invention 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 invention has the advantages and beneficial effects that:
1. the thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet can control the temperature of the thermal environment of a structural system to be constant, avoid the influence of the temperature-frequency characteristic of a composite damping material on the inherent characteristic test of the structural system and improve the test precision.
2. The thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet can control a structural system under a temperature-changing condition, thereby exploring the influence of the temperature-frequency characteristic of a damping material on the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet and simulating real working conditions.
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 invention;
FIG. 2 is a second schematic structural view of a thermal analysis test bed of the composite damping vibration attenuation scientific experiment cabinet of the invention;
FIG. 3 is a schematic structural diagram of a composite damping vibration attenuation scientific experimental cabinet installed in a thermal analysis test bed of the composite damping vibration attenuation scientific experimental cabinet of the present invention;
FIG. 4 is a schematic diagram of the ignition system of the present invention;
FIG. 5 is a schematic diagram of the thermal insulation test system of the present invention;
FIG. 6 is a schematic structural view of a work fixture according to the present invention;
FIG. 7 is a schematic structural diagram of the composite damping vibration attenuation scientific experimental cabinet of the present invention.
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 more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 3, the thermal analysis test bed for the composite damping vibration attenuation scientific experimental cabinet provided by the invention 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.
In the embodiment of the invention, as shown in fig. 2 and 4, the ignition system a comprises a gas tank 6 and a flame gun 7 connected with the gas tank 6, wherein the flame gun 7 is used for providing a fire source for the closed environment where the composite 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.
In the embodiment of the present invention, as shown in fig. 2, the thermal insulation and temperature measurement system B includes a thermal insulation cover 8 and an infrared thermometer 9 disposed on the thermal insulation cover 8, wherein the thermal insulation cover 8 is disposed outside the composite damping vibration damping scientific experiment cabinet C and connected to the base 1, and the infrared thermometer 9 is used for measuring the temperature inside the thermal insulation cover 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.
In the embodiment of the present invention, as shown in fig. 5, the heat shield 8 is provided with heat shield connecting portions 81 for connecting with the base 1 at both sides of the bottom thereof, and the heat shield connecting portions 81 are provided with connecting holes where the heat shield 8 is connected with the base 1 by bolts, and the heat shield 8 can be moved laterally and longitudinally. 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 invention, 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 test bed can test the composite damping vibration attenuation scientific experiment cabinet at constant temperature, can test the inherent characteristics of the composite damping vibration attenuation scientific experiment cabinet in an environment with uneven temperature distribution, simulates the real experiment working condition, and provides vibration input force through external excitation in the whole experiment process.
In the implementation of the invention, the ignition system A adopts a Robinham 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. Considering that the mechanical property of the damping material changes along with the temperature, the invention not only can test the composite damping vibration attenuation scientific experiment cabinet at constant temperature, but also can test the inherent property of the composite damping vibration attenuation scientific experiment cabinet in the environment of uneven temperature distribution, and simulate the real experiment working condition.
The above description is only an 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 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010395800.3A CN111473985A (en) | 2020-05-12 | 2020-05-12 | Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet |
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| CN202010395800.3A CN111473985A (en) | 2020-05-12 | 2020-05-12 | Thermal analysis test bed of composite damping vibration attenuation scientific experiment cabinet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112461678A (en) * | 2020-11-23 | 2021-03-09 | 北京空间机电研究所 | Spacecraft thin-wall structure thermal strength test device and test method |
| CN113899512A (en) * | 2021-11-15 | 2022-01-07 | 东北大学 | A fixture device for space station science experiment cabinet vibration test |
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2020
- 2020-05-12 CN CN202010395800.3A patent/CN111473985A/en active Pending
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