CN218765734U - Helicopter aerogun ground recoil test bench and system - Google Patents
Helicopter aerogun ground recoil test bench and system Download PDFInfo
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- CN218765734U CN218765734U CN202223058266.0U CN202223058266U CN218765734U CN 218765734 U CN218765734 U CN 218765734U CN 202223058266 U CN202223058266 U CN 202223058266U CN 218765734 U CN218765734 U CN 218765734U
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Abstract
The utility model relates to a helicopter structural strength design field, in particular to helicopter aerogun ground recoil test bench and system. This laboratory bench includes: the stand main body is used for simulating the dynamic characteristics of a helicopter aerogun loader; the platform main body adopts a truss structure and is divided into a front section and a rear section according to the force transmission path design of the recoil force of the launching of the aerogun; the front section adopts a small box type structure with a supporting rod structure and is used for recoil load diffusion, and an opening below the front section is used as an aerogun interface; the aerogun interface is used for connecting an aerogun; the rear section adopts a large box structure, and an opening at the side rear part is used as a basic interface.
Description
Technical Field
The utility model relates to a helicopter structural strength designs field, in particular to helicopter aerogun ground recoil test bench and system.
Background
Military helicopters are generally equipped with an aerial gun system to improve the hitting capability to enemies, and the instantaneous shock wave at the muzzle launched by the aerial gun can cause the failure and even damage of nearby structures and equipment, which can cause very adverse effects on the normal use and flight safety of the helicopter, so that the problem of compatibility of the aerial gun with the bomb is one of the major risks and difficulties in the development of the helicopter.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: this patent is based on purpose and the requirement of aircraft gun ground recoil test, and is similar based on rigidity and dynamics, has designed a ground recoil test bench of simulation aircraft gun installation, can provide test data and technical support for the aircraft gun development and the scheme optimization of armed helicopter.
The technical scheme of the utility model:
a helicopter aerogun ground recoil test stand comprising: the stand main body is used for simulating the dynamic characteristics of a helicopter aerogun loader;
the platform main body adopts a truss structure and is divided into a front section and a rear section according to the force transmission path design of the recoil force of the launching of the aerogun; the front section adopts a small box type structure and a strut structure for recoil load diffusion, and an opening below the front section is used as an aerogun interface; the aerogun interface is used for connecting an aerogun; the rear section adopts a large box structure, and an opening at the side rear part is used as a basic interface.
The test stand further comprises: frequency modulation balance weight;
the frequency modulation counter weights are installed on four end angles of the small box type structure and used for adjusting the natural frequency of the test bed to the first-order natural frequency of the simulated actual helicopter aerogun loader.
The bench main part adopts steel square pipe welding to form.
The aerogun interface is in butt joint with the aerogun through a bolt.
And connecting lugs are arranged on four end corners of the basic interface.
A helicopter aerogun ground recoil test system comprising: aerogun, helicopter aerogun ground shock wave test bed, ground support;
the lateral mounting surface of the ground support is fixedly butted with the foundation interface of the test bench, the aerial gun interface of the test bench is butted with the aerial gun, and the aerial gun muzzle faces the front.
The utility model has the advantages that: in order to carry out the end of model experiment to the recoil of aircraft gun transmission, the utility model discloses input conditions such as restraint boundary, rigidity, dynamic characteristic based on the true installation of aircraft gun to adopt rigidity and the similar design method of dynamics, designed one kind and satisfied under the experimental load intensity, physical boundary, and natural frequency adjustable aircraft gun ground recoil test bench.
Drawings
FIG. 1 is a schematic structural diagram of a helicopter aerogun ground recoil test bed.
Fig. 2 is a schematic structural diagram of a helicopter aerogun ground recoil test system.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at designing an aerogun ground recoil test bench, rack construction's function is for being used for simulating the rigidity and the dynamic characteristic of helicopter dress aerogun structure to an aerogun ground recoil is experimental, obtains the test result in order to guide the design of helicopter aerogun mounting structure.
The solution of the gantry is shown in fig. 1 and comprises: the structure comprises an aircraft gun interface 1, a rack main body 2, a foundation interface 3, a frequency modulation counterweight 4 and the like, wherein the main body is of a truss structure and is made of Q235 steel square tubes which are all welded, so that the structural efficiency is high and the weight is light;
the platform main body adopts a truss structure and is divided into a front section and a rear section according to the force transmission path design of the recoil force of the launching of the aerogun; the front section adopts a small box type structure and a strut structure for recoil load diffusion, and an opening below the front section is used as an aerogun interface; the aerogun interface is used for connecting an aerogun; the rear section adopts a large box type structure, and an opening at the side and the rear part is used as a basic interface.
The frequency modulation counter weights are installed on four end angles of the small box type structure and used for adjusting the natural frequency of the test bed to the first-order natural frequency of the simulated actual helicopter aerogun loader.
The bench main part adopts steel square pipe welding to form.
The aerogun interface is in butt joint with the aerogun through a bolt.
And connecting lugs are arranged on four end corners of the basic interface.
Based on structural optimization, the three-dimensional rigidity design of aerogun installation is realized, the overall anisotropic initial-order modal frequency simulates the real installation condition, and the design is adjustable;
the design of a hexagonal butt joint surface is adopted, and the joint assembly with the aerogun seat ring is realized;
based on dynamic response analysis, the structural strength meets the durability requirement under single-shot and continuous-shot test loads;
the basic interface is designed into a plane, so that the assembly with a ground support rack is convenient.
The utility model provides a helicopter aerogun ground recoil test system, include: the test bed comprises an aircraft gun 6, a helicopter aircraft gun ground shock wave test bed 2 and a ground support 7;
the lateral mounting surface of the ground support is fixedly butted with the foundation interface of the test bench, the aerial gun interface of the test bench is butted with the aerial gun, and the aerial gun muzzle faces the front.
The recoil test comprises four parts of frequency modulation, load calibration, recoil test and data processing
Carrying out a dynamic characteristic test of installation of a recoil rack assembly aerial gun before launching the aerial gun to obtain course and lateral first-order modal frequency, and adjusting the weight of four balancing weights to carry out frequency modulation according to a test result to ensure that the modal frequency is consistent with the corresponding modal frequency of a helicopter aerial gun assembly;
applying unit static load along the direction of the gun barrel of the aircraft gun, testing a strain value under the applied unit static load through a strain gauge 5 arranged on a rack framework, and establishing a recoil-strain corresponding relation, namely a load calibration matrix;
respectively carrying out single shot and continuous shot tests of the aerogun, and testing a strain data time domain curve of the strain gauge 5 on the rack framework;
processing and analyzing the actually measured strain data by adopting a load calibration matrix, and calculating to obtain a recoil curve of single shot and continuous shot of the aerogun;
and replacing the firing angle of the aerogun, and repeating the steps of frequency modulation, load calibration, recoil force test and data processing to realize the test of the recoil force of the launching of the aerogun at different firing angles.
The utility model discloses a key point:
(1) The utility model designs a ground test bed structure for simulating the physical boundary conditions of the actual installation of the aircraft gun based on the similar design of rigidity and dynamics and by adopting the structural form of a truss;
(2) Based on response analysis under the test load, the utility model discloses a durability design and the structural optimization of test bench
The above description is only for the specific embodiments of the present invention, and the present invention is described in detail, and the detailed description is not the conventional technology. However, the scope of the present invention 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 invention are also included in the scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a helicopter aerogun ground recoil test bench which characterized in that includes: the stand main body is used for simulating the dynamic characteristics of a helicopter aerogun loader;
the platform main body adopts a truss structure and is divided into a front section and a rear section according to the force transmission path design of the recoil force of the launching of the aerogun; the front section adopts a small box type structure and a strut structure for recoil load diffusion, and an opening below the front section is used as an aerogun interface; the aerogun interface is used for connecting an aerogun; the rear section adopts a large box structure, and an opening at the side rear part is used as a basic interface.
2. The test rig of claim 1, further comprising: a frequency-modulated counterweight (3);
the frequency modulation counter weights (3) are arranged on four end angles of the small box type structure and are used for adjusting the natural frequency of the test bed to the first-order natural frequency of the simulated actual helicopter aerogun.
3. The test bench of claim 1, wherein the bench body is welded from steel square tubes.
4. The test rig of claim 2, wherein the aerial gun interface interfaces with the aerial gun via a bolt.
5. The test rig according to claim 2, wherein the base interface is provided with attachment tabs at four corners of the base interface.
6. The utility model provides a helicopter aerogun ground recoil test system which characterized in that includes: an aircraft gun, a helicopter aircraft gun ground shock wave test stand, a ground support of any of claims 1-4;
the lateral mounting surface of the ground support is fixedly butted with the foundation interface of the test bench, the aerial gun interface of the test bench is butted with the aerial gun, and the aerial gun muzzle faces the front.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223058266.0U CN218765734U (en) | 2022-11-17 | 2022-11-17 | Helicopter aerogun ground recoil test bench and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223058266.0U CN218765734U (en) | 2022-11-17 | 2022-11-17 | Helicopter aerogun ground recoil test bench and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218765734U true CN218765734U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223058266.0U Active CN218765734U (en) | 2022-11-17 | 2022-11-17 | Helicopter aerogun ground recoil test bench and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218765734U (en) |
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2022
- 2022-11-17 CN CN202223058266.0U patent/CN218765734U/en active Active
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