CN110567803A - Low-rigidity tension and compression pad structure for realizing uniform loading of radome - Google Patents
Low-rigidity tension and compression pad structure for realizing uniform loading of radome Download PDFInfo
- Publication number
- CN110567803A CN110567803A CN201910687389.4A CN201910687389A CN110567803A CN 110567803 A CN110567803 A CN 110567803A CN 201910687389 A CN201910687389 A CN 201910687389A CN 110567803 A CN110567803 A CN 110567803A
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- Prior art keywords
- radome
- steel plate
- polyurethane
- loading
- pull
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- Pending
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- 238000007906 compression Methods 0.000 title claims abstract description 19
- 230000006835 compression Effects 0.000 title abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 229920002635 polyurethane Polymers 0.000 claims abstract description 42
- 239000004814 polyurethane Substances 0.000 claims abstract description 42
- 230000007704 transition Effects 0.000 claims abstract description 16
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 3
- 230000000452 restraining effect Effects 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 239000002023 wood Substances 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000004026 adhesive bonding Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Aerials (AREA)
Abstract
The invention belongs to the field of experimental mechanics, and particularly relates to a low-rigidity tension and compression pad structure for realizing uniform loading of a radome, which consists of a plurality of symbol-shaped polyurethane blocks, a transition steel plate and pull rings; the polyurethane block and the pull ring are respectively connected to two surfaces of the transition steel plate; the pull ring is arranged at a resultant force point of the loading subarea, and the resultant force point is superposed with the center of gravity of the steel plate. The structure provided by the invention can solve the problems that the force of the radome is too concentrated when the canvas belt applies load, and the local reinforcement is realized when the wood block/steel plate structure applies load, can ensure the uniform application of the radome load, and can not change the local rigidity of the radome; in addition, this patent design draws pressure pad structure owing to have the less polyurethane piece of a plurality of bonding areas to constitute, and leaves certain clearance between every polyurethane piece, compares in the big polyurethane piece of a monoblock and has good gas permeability, guarantees the bonding quality.
Description
Technical Field
The invention belongs to the field of test mechanics, and particularly relates to a low-rigidity tension and compression pad structure for realizing uniform loading of a radome.
Background
In the static test design of the radome, the pneumatic load in flight needs to be simplified into a plurality of subareas of test load to be applied, and the simplified load is applied in a concentrated force mode. In the prior art, when a load is applied to the radome, a loading canvas belt and a wood block/steel plate combined tension and compression cushion are mostly adopted for load transmission, the loading canvas belt is flexible, sewn and flaky, and the problem that the loading is too concentrated along the canvas belt sewing line in the force application process can be caused, the test application of the radome is too severe, and the problem that the test is influenced by the damage of the canvas belt along the sewing line when the load is too large can also occur; due to the fact that the wood block/steel plate combined tension and compression pad is high in rigidity, when the wood block/steel plate combined tension and compression pad is bonded with a radome to carry out load application, the rigidity is locally enhanced when the radome is loaded, and test results are affected. In order to solve the problems that the loading of a canvas belt is too severe and the loading of a wood block/steel plate combined tension and compression pad is conservative, a tension and compression pad structure which can realize uniform loading on the surface of a radar cover and can not cause rigidity enhancement on the local part of the radar cover needs to be designed to meet the accuracy and reliability of a static test.
Disclosure of Invention
The purpose of the invention is as follows: the problems that the wood block/steel plate combined structure is bonded and falls off and the radar cover is locally layered and damaged in the loading process due to the unsatisfactory character type of the wood block/steel plate combined structure and the radar cover bonding surface when a large load is applied to the surface of the large-curvature radar cover by the traditional wood block/steel plate combined structure are solved; a uniformly loaded low stiffness tension and compression pad structure is presented.
The technical scheme is as follows: a low rigidity tension and compression pad structure for realizing uniform loading of a radome comprises three parts, namely a plurality of symbol-shaped polyurethane blocks, a transition steel plate and a pull ring; the polyurethane block and the pull ring are respectively connected to two sides of the transition steel plate; the pull ring is arranged at the resultant force point of the loading partition.
The polyurethane block and the transition steel plate are bonded into a whole, and the uniform load transfer can be ensured by adopting adhesion.
The adhesive is FN305 adhesive, and the adhesive is high in bonding strength.
The connecting end of the pull ring and the steel plate adopts a ball head connecting form, and loads can be applied in different directions.
The other end of the pull ring is provided with a switching ring, the inner wall of the switching ring is provided with a groove, and the groove is used for restraining a load transmission steel wire rope during loading, so that the sliding of the steel wire rope in the switching ring during high load is avoided, and the loading direction is ensured.
the distance between the polyurethane blocks is 2-10mm, so that rigidity transmission is avoided while the polyurethane blocks are in contact in the loading process.
The number of the polyurethane blocks and the distance between the polyurethane blocks are obtained by rigidity simulation optimization; the influence of the polyurethane block on the test result is reduced, and the surface loading of the radar cover is simulated more truly.
The resultant force point is superposed with the center of gravity of the steel plate, so that the uniform stress is ensured, and the local stress damage of the radome is avoided.
The charpy polyurethane blocks are combined with the transition steel plate in an adhering mode, the pull ring is connected in the transition steel plate in a threaded mode, a plurality of charpy polyurethane blocks are arranged according to a certain gap in the test process, one side of the charpy polyurethane blocks, which is connected with the steel plate, is adhered with the steel plate, one side of the charpy polyurethane blocks, which is adhered with the radar cover, and the pull ring is used for connecting the steel wire rope with the loading system to conduct the test. After bonding is completed, a low-rigidity tension and compression pad suitable for uniform loading of the radome is manufactured.
The beneficial technical effects are as follows: the structure provided by the invention can solve the problems that the force of the radome is too concentrated when the canvas belt applies load, and the local reinforcement is realized when the wood block/steel plate structure applies load, can ensure the uniform application of the radome load, and can not change the local rigidity of the radome; in addition, this patent design draws pressure pad structure owing to have the less polyurethane piece of a plurality of bonding areas to constitute, and leaves certain clearance between every polyurethane piece, compares in the big polyurethane piece of a monoblock and has good gas permeability, guarantees the bonding quality.
Drawings
Figure 1 is a schematic view of a structure of a tension-compression pad,
Figure 2 is a top view of the tension and compression pad structure,
Wherein, the steel plate comprises 1-pull ring, 2-transition steel plate and 3-polyurethane block.
Detailed Description
Referring to the attached drawings 1 and 2, the low-rigidity tension and compression pad structure for realizing uniform loading of the radome comprises three parts, namely a plurality of symbol-shaped polyurethane blocks, a transition steel plate and a pull ring; the polyurethane block and the pull ring are respectively connected to two sides of the transition steel plate; the pull ring is arranged at the resultant force point of the loading partition; the resultant force point is superposed with the center of gravity of the steel plate, so that the uniform stress is ensured, and the local stress damage of the radome is avoided. On the basis of the structural design, the practical application environment and requirements can be further improved in the specific implementation process, and the specific improvements are as follows:
In this draw and press pad structure, the polyurethane piece bonds as an organic wholely with the transition steel sheet, adopts the gluing of gluing agent can guarantee that the load transfer is even. The adhesive is FN305 adhesive, and the adhesive is high in bonding strength.
In order to implement loading tests in different directions, the connecting ends of the pull rings and the steel plates are in a ball head connection mode, and loads can be applied in different directions. The other end of the pull ring is provided with a switching ring, the inner wall of the switching ring is provided with a groove, and the groove is used for restraining a load transmission steel wire rope during loading, so that the sliding of the steel wire rope in the switching ring during high load is avoided, and the loading direction is ensured.
In the tension and compression pad structure, the distance between the polyurethane blocks is 2-10mm, so that rigidity transmission is avoided while the polyurethane blocks are in contact in the loading process. The number of the polyurethane blocks and the distance between the polyurethane blocks are obtained by rigidity simulation optimization; the influence of the polyurethane block on the test result is reduced, and the surface loading of the radar cover is simulated more truly.
The charm polyurethane block is combined with the transition steel plate by bonding, the pull ring is screwed in the transition steel plate, and the specific structure of the tension and compression pad is shown in figure 1. During the test, a plurality of symbol-shaped polyurethane blocks are arranged according to a certain gap, one surface of the symbol-shaped polyurethane blocks and the steel plate are bonded, one surface of the symbol-shaped polyurethane blocks and the radar cover are bonded, and the steel wire rope and the loading system are connected by utilizing the pull ring to perform the test. After bonding is completed, a low-rigidity tension and compression pad suitable for uniform loading of the radome is manufactured.
The structure provided by the invention can solve the problems that the force of the radome is too concentrated when the canvas belt applies load, and the local reinforcement is realized when the wood block/steel plate structure applies load, can ensure the uniform application of the radome load, and can not change the local rigidity of the radome; in addition, this patent design draws pressure pad structure owing to have the less polyurethane piece of a plurality of bonding areas to constitute, and leaves certain clearance between every polyurethane piece, compares in the big polyurethane piece of a monoblock and has good gas permeability, guarantees the bonding quality.
Claims (8)
1. The utility model provides a realize radome uniform loading's low rigidity and draw pressure pad structure which characterized in that: the structure consists of a plurality of symbol polyurethane blocks, a transition steel plate and a pull ring; the polyurethane block and the pull ring are respectively connected to two surfaces of the transition steel plate; the pull ring is arranged at a resultant force point of the loading subarea, and the resultant force point is superposed with the center of gravity of the steel plate.
2. The structure of claim 1, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the polyurethane block and the transition steel plate are bonded into a whole by adopting an adhesive.
3. The structure of claim 2, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the adhesive is FN305 adhesive.
4. the structure of claim 1, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the connecting end of the pull ring and the transition steel plate adopts a ball head connecting form.
5. the structure of the low-rigidity tension-compression pad for realizing the uniform loading of the radome, which is characterized in that: and the other end of the pull ring is provided with a switching ring.
6. The structure of claim 5, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the inner wall of the adapter ring is provided with a groove, and the groove is used for restraining a load transmission steel wire rope during loading.
7. The structure of claim 1, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the polyurethane blocks are arranged at intervals of 2-10 mm.
8. The structure of claim 7, wherein the low rigidity pull-press pad structure for realizing uniform loading of the radome is characterized in that: the number of polyurethane blocks and the distance between the polyurethane blocks are obtained by rigidity simulation optimization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687389.4A CN110567803A (en) | 2019-07-26 | 2019-07-26 | Low-rigidity tension and compression pad structure for realizing uniform loading of radome |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910687389.4A CN110567803A (en) | 2019-07-26 | 2019-07-26 | Low-rigidity tension and compression pad structure for realizing uniform loading of radome |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110567803A true CN110567803A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910687389.4A Pending CN110567803A (en) | 2019-07-26 | 2019-07-26 | Low-rigidity tension and compression pad structure for realizing uniform loading of radome |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110567803A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740172A (en) * | 2021-09-14 | 2021-12-03 | 中建八局第一建设有限公司 | Steel constructs combination column loading test device |
| CN114960785A (en) * | 2022-07-11 | 2022-08-30 | 重庆科技学院 | Flexible bearing plate for foundation load test |
| CN117054199A (en) * | 2023-10-11 | 2023-11-14 | 沈阳市中飞机械厂有限公司 | Radome mechanical test tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132825A (en) * | 1975-05-30 | 1979-01-02 | Messerschmitt-Bolkow-Blohm Gmbh | Composite structural member, especially for dynamic loads |
| CN207050968U (en) * | 2017-07-14 | 2018-02-27 | 中国航空工业集团公司济南特种结构研究所 | A kind of antenna house slow test biaxial loadings device |
| CN109459299A (en) * | 2018-12-07 | 2019-03-12 | 中国航空工业集团公司济南特种结构研究所 | Load loading method is drawn in composite element slow test under a kind of big load |
-
2019
- 2019-07-26 CN CN201910687389.4A patent/CN110567803A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132825A (en) * | 1975-05-30 | 1979-01-02 | Messerschmitt-Bolkow-Blohm Gmbh | Composite structural member, especially for dynamic loads |
| CN207050968U (en) * | 2017-07-14 | 2018-02-27 | 中国航空工业集团公司济南特种结构研究所 | A kind of antenna house slow test biaxial loadings device |
| CN109459299A (en) * | 2018-12-07 | 2019-03-12 | 中国航空工业集团公司济南特种结构研究所 | Load loading method is drawn in composite element slow test under a kind of big load |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113740172A (en) * | 2021-09-14 | 2021-12-03 | 中建八局第一建设有限公司 | Steel constructs combination column loading test device |
| CN113740172B (en) * | 2021-09-14 | 2024-04-30 | 中建八局第一建设有限公司 | Steel constructs composite column loading test device |
| CN114960785A (en) * | 2022-07-11 | 2022-08-30 | 重庆科技学院 | Flexible bearing plate for foundation load test |
| CN114960785B (en) * | 2022-07-11 | 2023-05-12 | 重庆科技学院 | A flexible bearing plate for foundation load test |
| CN117054199A (en) * | 2023-10-11 | 2023-11-14 | 沈阳市中飞机械厂有限公司 | Radome mechanical test tool |
| CN117054199B (en) * | 2023-10-11 | 2023-12-22 | 沈阳市中飞机械厂有限公司 | Radome mechanical test tool |
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Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |