CN112595477A - Excitation clamping device for arc-shaped air inlet pipe vibration test - Google Patents
Excitation clamping device for arc-shaped air inlet pipe vibration test Download PDFInfo
- Publication number
- CN112595477A CN112595477A CN202011242225.XA CN202011242225A CN112595477A CN 112595477 A CN112595477 A CN 112595477A CN 202011242225 A CN202011242225 A CN 202011242225A CN 112595477 A CN112595477 A CN 112595477A
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- Prior art keywords
- excitation
- excitation rod
- rod
- air inlet
- inlet pipe
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- 230000005284 excitation Effects 0.000 title claims abstract description 96
- 238000000034 method Methods 0.000 abstract description 9
- 238000004088 simulation Methods 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000006467 substitution reaction 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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/027—Specimen mounting arrangements, e.g. table head adapters
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The application belongs to the technical field of aviation strength tests, and particularly relates to an excitation clamping device for an arc-shaped air inlet pipe vibration test. The method comprises the following steps: the first excitation rod, the second excitation rod and the cushion block. The cross section of the first excitation rod is L-shaped, and a first contact surface matched with the outer wall surface of the air inlet pipe is arranged at the first end of the first excitation rod; the cross section of the second excitation rod is Z-shaped, a second contact surface matched with the inner wall surface of the air inlet pipe is arranged at the first end of the second excitation rod, and the second contact surface corresponds to the first contact surface; the cushion block is arranged between the first excitation rod and the second excitation rod, and the first excitation rod, the cushion block and the second excitation rod are sequentially connected through fasteners. This application can make the excitation rod closely laminate with the test piece at excitation point target location, and the test piece can not produce the damage at the centre gripping in-process simultaneously, makes intake pipe vibration test can the real pneumatic load of simulation test piece.
Description
Technical Field
The application belongs to the technical field of aviation strength tests, and particularly relates to an excitation clamping device for an arc-shaped air inlet pipe vibration test.
Background
In the use process of a certain airplane, the phenomenon of rivet looseness, skin tearing and air inlet pipe crack occurs at the part of the inner side of the vertical tail, which is connected with the air inlet pipe, the phenomenon may be caused by the excitation of the air inlet pipe by the pneumatic load of the airplane during high-speed flight, and the vibration test needs to be carried out on the air inlet pipe on a vibration table in order to find out the fault reason and find out the improved scheme. The test control point and the excitation point of the test are both arranged on the arc-shaped air inlet pipeline, the shape of the test piece is complex, the wallboard at the excitation point is weak, and how to realize the effective connection of the excitation rod and the test piece is a technical difficulty, and the traditional clamping method is difficult to realize.
Accordingly, a technical solution is desired to overcome or at least alleviate at least one of the above-mentioned drawbacks of the prior art.
Disclosure of Invention
The application aims at providing an excitation clamping device for an arc-shaped air inlet pipe vibration test, and at least one problem existing in the prior art is solved.
The technical scheme of the application is as follows:
an excitation clamping device for an arc-shaped air inlet pipe vibration test comprises:
the cross section of the first excitation rod is L-shaped, and a first contact surface matched with the outer wall surface of the air inlet pipe is arranged at the first end of the first excitation rod;
the cross section of the second excitation rod is Z-shaped, a second contact surface matched with the inner wall surface of the air inlet pipe is arranged at the first end of the second excitation rod, and the second contact surface corresponds to the first contact surface;
the cushion block is arranged between the first excitation rod and the second excitation rod and sequentially connects the first excitation rod, the cushion block and the second excitation rod through fasteners.
Optionally, the first contact surface and the second contact surface are obtained by wire cutting.
Optionally, a first gap is formed between the first excitation rod and the pad block, and the first gap is 5 μm to 10 μm.
Optionally, a second gap is formed between the second excitation rod and the pad block, and the second gap is 5 μm to 10 μm.
Optionally, the fastener is a bolt.
Optionally, the second end of the first excitation rod and the second end of the second excitation rod are both connected with the vibration table through a test fixture.
The invention has at least the following beneficial technical effects:
the utility model provides an excitation clamping device for arc intake pipe vibration test can make the excitation rod closely laminate at excitation point target location with the test piece, and the test piece can not produce the damage at the centre gripping in-process simultaneously, and can not produce the slip at excitation in-process excitation rod to make vibration load can stably transmit effectively to the test piece through the excitation rod on, make intake pipe vibration test can true simulation test piece aerodynamic load.
Drawings
FIG. 1 is a schematic illustration of a target location for an arc intake pipe excitation point according to an embodiment of the present application;
FIG. 2 is an overall assembly view of an excitation clamping device for a vibration test of an arc-shaped air inlet pipe according to an embodiment of the application;
FIG. 3 is a schematic view of an excitation clamping device for a vibration test of an arc-shaped air inlet pipe according to an embodiment of the application;
fig. 4 is a schematic diagram of a spacer block of an excitation clamping device for a vibration test of an arc-shaped air inlet pipe according to an embodiment of the application.
Wherein:
1-a first excitation rod; 2-a first contact surface; 3-cushion block; 4-a second contact surface; 5-a second excitation rod; 6-bolt; 7-air inlet pipe.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are a subset of the embodiments in the present application and not all embodiments in the present application. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present application and for simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the scope of the present application.
The present application is described in further detail below with reference to fig. 1 to 4.
The application provides an excitation clamping device for arc intake pipe vibration test includes: a first actuating lever 1, a second actuating lever 5 and a spacer 3.
The application discloses an excitation clamping device for arc intake pipe vibration test for to for example in the arc intake pipe vibration test of aircraft vertical fin, carry out the centre gripping to the testpieces, realize the load transfer effectively. In one embodiment of the present application, the excitation point target location is as shown in FIG. 1.
Specifically, as shown in fig. 2, the cross section of the first excitation rod 1 is L-shaped, the first end of the first excitation rod 1 is provided with a first contact surface 2, and the first contact surface 2 is matched with the outer wall surface of the air inlet pipe 7 at the target position of the excitation point and has the same shape; the cross section of the second excitation rod 5 is Z-shaped, a second contact surface 4 is arranged at the first end of the second excitation rod 5, the second contact surface 4 is matched with the inner wall surface of the air inlet pipe 7 at the target position of the excitation point, the second contact surface 4 has the same shape, and the second contact surface 4 corresponds to the first contact surface 2; the cushion block 3 is disposed between the first excitation lever 1 and the second excitation lever 5, and the first excitation lever 1, the cushion block 3, and the second excitation lever 5 are connected in this order by a fastener 6.
In one embodiment of the present application, a complete aluminum block is preferably made into three parts, i.e., the first actuating rod 1, the second actuating rod 5 and the spacer 3, by wire cutting. In this embodiment, the first contact surface 2 of the first excitation rod 1 and the tube wall of the air inlet tube 7, and the second contact surface 4 of the second excitation rod 5 and the tube wall of the air inlet tube 7 are obtained by wire cutting, so that the first excitation rod and the second excitation rod can be completely attached to the tube wall of the air inlet tube 7. When the first contact surface 2 and the second contact surface 4 are completely attached to the pipe wall 7 by controlling the machining precision, a first gap is formed between the first excitation rod 1 and the cushion block 3, the first gap is 5-10 micrometers, a second gap is formed between the second excitation rod 5 and the cushion block 3, and the second gap is 5-10 micrometers.
In an embodiment of the present application, the fastening member 6 is a bolt, and when the first excitation rod 1 and the second excitation rod 5 are pressed against the cushion block 3 through the bolt 6, the pretightening force of the bolt 6 enables the first contact surface 2 and the second contact surface 4 to be tightly attached to the pipe wall of the air inlet pipe 7, so that the excitation force can be transmitted from the excitation rods to the pipe wall of the air inlet pipe 7.
In one embodiment of the present application, the second end of the first excitation rod 1 and the second end of the second excitation rod 5 are both connected to the vibration table through a test fixture. The first exciting rod 1 and the second exciting rod 5 are respectively connected with a test fixture through bolts, and the exciting force of the vibration table is transmitted to the exciting rods through the test fixture.
The utility model provides an excitation clamping device for arc intake pipe vibration test can make the excitation rod closely laminate at excitation point target location with the test piece, and the test piece can not produce the damage at the centre gripping in-process simultaneously, and can not produce the slip at excitation in-process excitation rod to make vibration load can stably transmit effectively to the test piece through the excitation rod on, make intake pipe vibration test can true simulation test piece aerodynamic load. The problem that the traditional excitation rod clamping method is difficult to realize reliable clamping of the test piece is solved, and a new thought is provided for clamping of the test piece.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides an excitation clamping device for arc intake pipe vibration test which characterized in that includes:
the cross section of the first excitation rod (1) is L-shaped, and a first contact surface (2) matched with the outer wall surface of the air inlet pipe (7) is arranged at the first end of the first excitation rod (1);
the cross section of the second excitation rod (5) is Z-shaped, a second contact surface (4) matched with the inner wall surface of the air inlet pipe (7) is arranged at the first end of the second excitation rod (5), and the second contact surface (4) corresponds to the first contact surface (2);
the cushion block (3) is arranged between the first excitation rod (1) and the second excitation rod (5), and the first excitation rod (1), the cushion block (3) and the second excitation rod (5) are sequentially connected through a fastener (6).
2. The excitation clamping device for the arc-shaped air inlet pipe vibration test is characterized in that the first contact surface (2) and the second contact surface (4) are obtained by wire cutting.
3. The excitation clamping device for the arc-shaped air inlet pipe vibration test is characterized in that a first clearance is formed between the first excitation rod (1) and the cushion block (3), and the first clearance is 5-10 μm.
4. The excitation clamping device for the arc-shaped air inlet pipe vibration test is characterized in that a second gap is formed between the second excitation rod (5) and the cushion block (3), and the second gap is 5-10 μm.
5. The excitation clamping device for the arc-shaped air inlet pipe vibration test is characterized in that the fastening piece (6) is a bolt.
6. The excitation clamping device for the arc-shaped air inlet pipe vibration test is characterized in that the second end of the first excitation rod (1) and the second end of the second excitation rod (5) are connected with a vibration table through test clamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011242225.XA CN112595477A (en) | 2020-11-09 | 2020-11-09 | Excitation clamping device for arc-shaped air inlet pipe vibration test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011242225.XA CN112595477A (en) | 2020-11-09 | 2020-11-09 | Excitation clamping device for arc-shaped air inlet pipe vibration test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112595477A true CN112595477A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011242225.XA Pending CN112595477A (en) | 2020-11-09 | 2020-11-09 | Excitation clamping device for arc-shaped air inlet pipe vibration test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112595477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264445A (en) * | 2021-11-26 | 2022-04-01 | 中电科芜湖通用航空产业技术研究院有限公司 | Flutter test flight excitation device and method |
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|---|---|---|---|---|
| US20130276543A1 (en) * | 2012-04-20 | 2013-10-24 | The Regents Of The University Of Michigan | Virtual noncontact excitation |
| CN204314040U (en) * | 2014-12-26 | 2015-05-06 | 曼胡默尔滤清器（上海）有限公司 | A kind of novel vibrating fixture for inlet manifold vibration test |
| CN106482953A (en) * | 2016-11-25 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aeroengine pipeline vibration-testing apparatus and method |
| CN207439631U (en) * | 2017-11-29 | 2018-06-01 | 北京汽车研究总院有限公司 | A kind of vibration test fixture component |
| CN207724162U (en) * | 2017-11-20 | 2018-08-14 | 广西科技大学 | A kind of fixture for automobile exhaust pipe vibration experiment |
| CN109269748A (en) * | 2018-10-31 | 2019-01-25 | 中海油能源发展股份有限公司 | Pipeline detection vibration equipment fixture |
| CN210051506U (en) * | 2019-06-25 | 2020-02-11 | 上海航空材料结构检测股份有限公司 | Bending vibration fatigue test device of flat plate type test piece |
| CN111780957A (en) * | 2020-07-01 | 2020-10-16 | 中国航发沈阳发动机研究所 | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine |
-
2020
- 2020-11-09 CN CN202011242225.XA patent/CN112595477A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130276543A1 (en) * | 2012-04-20 | 2013-10-24 | The Regents Of The University Of Michigan | Virtual noncontact excitation |
| CN204314040U (en) * | 2014-12-26 | 2015-05-06 | 曼胡默尔滤清器（上海）有限公司 | A kind of novel vibrating fixture for inlet manifold vibration test |
| CN106482953A (en) * | 2016-11-25 | 2017-03-08 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of aeroengine pipeline vibration-testing apparatus and method |
| CN207724162U (en) * | 2017-11-20 | 2018-08-14 | 广西科技大学 | A kind of fixture for automobile exhaust pipe vibration experiment |
| CN207439631U (en) * | 2017-11-29 | 2018-06-01 | 北京汽车研究总院有限公司 | A kind of vibration test fixture component |
| CN109269748A (en) * | 2018-10-31 | 2019-01-25 | 中海油能源发展股份有限公司 | Pipeline detection vibration equipment fixture |
| CN210051506U (en) * | 2019-06-25 | 2020-02-11 | 上海航空材料结构检测股份有限公司 | Bending vibration fatigue test device of flat plate type test piece |
| CN111780957A (en) * | 2020-07-01 | 2020-10-16 | 中国航发沈阳发动机研究所 | Test platform for testing static and dynamic mechanical properties of L-shaped pipeline of aircraft engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114264445A (en) * | 2021-11-26 | 2022-04-01 | 中电科芜湖通用航空产业技术研究院有限公司 | Flutter test flight excitation device and method |
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Application publication date: 20210402 |