CN117989918A - Extreme impact load loading device - Google Patents
Extreme impact load loading device Download PDFInfo
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- CN117989918A CN117989918A CN202410091298.5A CN202410091298A CN117989918A CN 117989918 A CN117989918 A CN 117989918A CN 202410091298 A CN202410091298 A CN 202410091298A CN 117989918 A CN117989918 A CN 117989918A
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- gas
- impact load
- pressure
- load loading
- extreme impact
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- 230000001052 transient effect Effects 0.000 claims abstract description 8
- 239000003721 gunpowder Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 12
- 239000004449 solid propellant Substances 0.000 claims description 10
- 238000000418 atomic force spectrum Methods 0.000 claims description 9
- 239000003380 propellant Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000006757 chemical reactions by type Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 52
- 238000012360 testing method Methods 0.000 description 22
- 239000002737 fuel gas Substances 0.000 description 13
- 239000007787 solid Substances 0.000 description 10
- 238000010304 firing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000012795 verification Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012942 design verification Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41A—FUNCTIONAL FEATURES OR DETAILS COMMON TO BOTH SMALLARMS AND ORDNANCE, e.g. CANNONS; MOUNTINGS FOR SMALLARMS OR ORDNANCE
- F41A31/00—Testing arrangements
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an extreme impact load loading device, comprising: the gas-sealed latch body is arranged at the bottom of the gas chamber, the charging structure is arranged in the gas chamber and is adjacent to the gas-sealed latch body, the driving force generating device is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector is arranged in the gas chamber and is connected with the tested stress device through the load loading connector, and the extreme impact load is transmitted to the tested device according to the required load loading direction.
Description
Technical Field
The invention belongs to the technical field of gun-launched impact load, and particularly relates to an extreme impact load loading device.
Background
When the gun is launched, the gunpowder gas acts on the projectile to push the projectile to move at a high speed, and simultaneously, the resultant force of the bore of the reaction of the gunpowder gas acts on the gun body, so that huge impact load is generated on the gun body, and the action process and the rule of the extreme impact load are critical to the structural designs of a cradle, a recoil device, an upper frame, a large frame and the like of the gun, so that the gun is determined to be key to the launching stability, the reliability, the safety and the like of the gun. Therefore, the method and the device for testing the impact load action in the gun firing process, which can be quickly constructed and have low test condition requirements, are an important means for supporting the high-efficiency design and verification of the gun.
The traditional test research method of the gun impact load is mainly to verify by adopting the actual emission of the gun, and the method can truly and accurately verify the action process of the gun extreme impact and the influence of the gun extreme impact on the structure. However, as the device is required to construct a complete gun launching device to carry out corresponding test verification, the device has long construction period and high cost, the device needs to launch the projectile, the test condition is complex, the requirement on a test site is high, the safety risk exists, the requirement on early principle verification is difficult to meet, and particularly, the test verification condition cannot be provided for primary design, so that the optimization design of the gun is restricted.
The hydraulic artificial recoil test system is a simulated artillery recoil test device, and the hydraulic oil cylinder is arranged at the front section of the artillery recoil machine, the recoil rod with the piston in the recoil machine is pushed by high-pressure liquid to move backwards to drive the artillery recoil, when the artillery recoil is at a preset position, the hydraulic system is rapidly unloaded, and the artillery body automatically starts to recoil under the action of compressed gas in the recoil machine. Although the method can enable the artillery to sit back and simulate the re-entry process, the hydraulic loading is adopted, so that the impact load in the process of firing the artillery cannot be simulated, and the method can only be used for the design verification of the re-entry machine.
Disclosure of Invention
The invention provides an extreme impact load loading device, which utilizes the action principle of a muzzle brake, adopts a reversely installed muzzle brake, simulates the resultant force of a bore when an artillery is launched by a high-pressure gunpowder gas action and a reverse muzzle brake, and loads the resultant force on an artillery structure to realize the dynamic loading of the extreme load.
The technical scheme for realizing the purpose of the invention is as follows: an extreme impact load loading device comprising: the gas-sealed latch body is arranged at the bottom of the gas chamber, the charging structure is arranged in the gas chamber and is adjacent to the gas-sealed latch body, the driving force generating device is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector is arranged in the gas chamber and is connected with the tested stress device through the load loading connector, and the extreme impact load is transmitted to the tested device according to the required load loading direction.
Preferably, the driving force generating device adopts an impact type or reaction type muzzle brake structure, and the front end baffle plate is used for sealing a central bullet hole of the brake, and only a side hole is reserved for generating extreme impact load with transient action under the action of high-pressure gas.
Preferably, the charge structure comprises a cartridge, a solid propellant charge and a pressure release hole, wherein the cartridge is arranged inside the gas chamber and adjacent to the gas-tight latch, the solid propellant charge is arranged inside the cartridge, and the pressure release hole is arranged at one end of the cartridge far away from the gas-tight latch.
Preferably, the desired loading force profile is formed by adjusting the solid propellant charge and the pressure relief orifice.
Preferably, by adjusting the solid propellant charge and the pressure relief orifice, the specific method of forming the desired loading force profile is:
Calculating the relation between the propellant charge combustion ratio and the generated pressure according to the propellant charge combustion equation
Wherein, ψ is the burnt percentage of gunpowder, χ, λ, μ is the shape characteristic quantity of the gunpowder, Z is the burnt relative thickness of the gunpowder, t is time, u 1 is the burning rate constant, p is the gas pressure, n is the burning rate index, e 1 is 1/2 of the initial thickness of the gunpowder;
Controlling the gas pressure by controlling the flow of the powder-filled powder type and the pressure release hole, wherein the gas pressure acts on the powder gas front end baffle plate of the driving force generating device and the acting surface of the brake structure to generate corresponding acting force;
If the total area of the front end baffle and the acting surface of the brake structure is equivalent to the area in the axial direction of the gas chamber as S, the generated impact load is F (t) =p a (t) S, wherein p a (t) is the time-varying value of the mouth pressure of the driving force generating device, and F (t) is the time-varying value of the impact load, namely the loading force curve.
Compared with the prior art, the invention has the remarkable advantages that:
Compared with a real gun shooting test, the extreme impact load loading device provided by the invention does not need to shoot the shot, and has no complex requirements on a test site such as a target lane, shot drop point control, shelter and the like because of no high-speed shot flying from a gun barrel, so that the test tissue difficulty is greatly reduced, the test safety is improved, and the test efficiency is improved.
The explosive loading structure with the pressure release holes on the explosive cartridge can realize the control of the firing process of the propellant and the pressure regulation thereof, and can realize the loading of impact load curves at different polar ends through the regulation of the firing dosage and the size of the pressure release holes.
The driving force generating device provided by the invention is provided with the front end baffle, can directly act with high-pressure gas sprayed by the barrel, greatly increases the acting area of the high-pressure gas, generates larger reverse impact force, greatly increases the acting force compared with the traditional brake, and can solve the problem that the simulated loading peak value of the extreme impact load is difficult to improve.
The load loading connector provided by the invention can be connected with different devices according to the needs, has the advantages of higher flexibility and wider application range compared with a real shooting test or a hydraulic artificial recoil test system and the like, and can be widely applied to simulating the high thrust load effect in different stages of the launching process of a rocket, a missile and the like.
The present invention will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of an extreme load loading device according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an extreme impact load loading test of an artillery anti-squat device according to an embodiment of the present invention.
Fig. 3 is a graph showing the change of the extreme impact load acting force of the anti-recoil device of the gun with time according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The conception of the invention is as follows: an extreme impact load loading device comprises a gas-tight latch body, a cartridge, a solid emission charge, a pressure release hole, a gas chamber, an impulse force generating device and a load loading connector.
The sealed latch body is positioned at the bottom end of the gas chamber, is used for transmitting charge filling when opened, and seals high-pressure gas when closed; the cartridge case, the solid emission charge and the pressure release hole form a charge structure for generating high-pressure fuel gas, the solid emission charge is combusted after firing to generate the high-pressure fuel gas, and the high-pressure fuel gas enters the fuel gas chamber through the pressure release hole to control the flow; the gas chamber is a space where high-pressure gas expands and flows out; the principle of the driving force generating device is the same as that of the gun muzzle brake of the gun, an impact type or reaction type muzzle brake structure can be adopted, a front end baffle plate is used for sealing a central bullet hole of the brake, and only a side hole is reserved for generating extreme impact load with transient action under the action of high-pressure gas; the load loading connector is used for being connected with a tested stress device, and transmitting extreme impact load to the tested device according to the required load loading direction, wherein the acting force direction is the same as the direction of the high-pressure fuel gas outlet.
The powder charging structure comprising a cartridge, a solid emission powder charge and a pressure release hole takes the powder charge as an energy source, and the emission powder charge burns to generate high-pressure fuel gas after firing.
When high-pressure gas enters the driving force generating device through the gas chamber, the cross section in the device is larger than that of the connecting part of the gas chamber, and the side surface of the device is provided with a flow guide through hole, so that the gas is accelerated to expand. One part of the air flows out forwards to act on the front baffle plate to generate acting force for the movement of the pushing device, the other part of the air changes the flow direction to enter the side hole and is discharged through the flow guide surface, and the acting force for the movement of the pushing device is also generated and combined to generate extreme impact load.
The law of extreme impact loads can be adjusted by adjusting the solid propellant charge and the pressure relief orifice to form the desired loading force profile. The relation between the propellant combustion ratio and the generated pressure can be calculated according to the propellant combustion equation
Wherein, ψ is the burnt percentage of gunpowder, χ, λ, μ is the shape characteristic quantity of the gunpowder, Z is the burnt relative thickness of the gunpowder, t is time, u 1 is the burning rate constant, p is the gas pressure, n is the burning rate index, e 1 is the initial thickness of 1/2 of the gunpowder. The gas pressure can be controlled by the flow of the powder type and the pressure release hole, and the gas pressure acts on the powder gas front end baffle plate of the driving force generating device and the acting surface of the brake structure to generate corresponding acting force. Assuming that the total area of the front end baffle plate and the acting surface of the brake structure is equivalent to the area in the axial direction of the gas chamber as S, the impact load generated by the front end baffle plate and the brake structure is F (t) =p a (t) S, wherein p a (t) is a time-varying value of the mouth pressure of the driving force generating device, and F (t) is a time-varying value of the impact load, namely a loading force curve.
The load loading connector is used for being connected with the stress device, the flowing direction of the high-pressure fuel gas in the fuel gas chamber is the acting force direction, and the load loading direction of the stress device is kept parallel to the axial direction of the fuel gas chamber during connection, so that a loading test can be performed after fastening connection.
The working principle of the invention is that the rocket engine with multiple stages connected in parallel is used as power, the resultant force of the bore of the artillery during the firing of the artillery is simulated by controlling the thrust of the rocket engine, and the rocket engine is loaded on the artillery structure to provide verification conditions for the structural design of the artillery.
Examples
An extreme impact load loading device is shown in figure 1, and comprises a gas-tight latch body 1, a cartridge 2, a solid propellant charge 3, a pressure release hole 4, a gas chamber 5, an impulse force generating device 6 and a load loading connector 7. The airtight latch body 1 is positioned at the bottom end of the gas chamber 5, and is used for transmitting and filling the charges when opened and sealing high-pressure gas when closed; the cartridge 2 is arranged in the gas chamber 5, the solid emission charge 3 is arranged in the gas chamber 5, the pressure release hole 4 is arranged at one end of the cartridge 2 far away from the sealed latch body 1, the pushing force generating device 6 is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector 7 is arranged in the gas chamber 5 and is connected with a tested stress device through the load loading connector 7, the extreme impact load is transmitted to the tested device according to the required load loading direction, and the acting force direction of the extreme impact load is the same as the direction of a high-pressure gas outlet.
Further, the cartridge 2, the solid emission charge 3 and the pressure release hole 4 form a charge structure for generating high-pressure fuel gas, the solid emission charge 3 burns to generate high-pressure fuel gas after firing, and the high-pressure fuel gas enters the fuel gas chamber 5 through the pressure release hole 4 by controlling the flow; the gas chamber 5 is a space where high-pressure gas pressure expands and flows out; the principle of the driving force generating device 6 is the same as that of an artillery muzzle brake, an impact type or reaction type muzzle brake structure can be adopted, a front end baffle plate is used for sealing a central bullet hole of the brake, and only a side hole is reserved for generating extreme impact load with transient action under the action of high-pressure gas.
This embodiment provides an example of the use of an extreme impact load loading device for an artillery anti-squat apparatus test, as shown in fig. 2. The gun is firmly restrained on the ground by a fixed bracket 10, a load loading connector 7 is tightly hooped at the front end of a gun barrel 8, extreme impact load is transmitted to a recoil device 9 through the barrel and a supporting structure thereof for test loading, and in order to ensure the stability of the barrel during test, a supporting device 11 can be additionally arranged at the front end of the barrel.
During test loading, a charging structure consisting of a cartridge 2, a solid emission charging 3 and a pressure release hole 4 is used as an energy source, the charging structure is filled into the rear end of a gas cavity 5, a closed latch body 1 is closed, then the solid emission charging 3 is triggered, the solid emission charging 3 is burnt to generate high-pressure gas, and in order to enable the high-pressure gas to act on a thrust generation device 6 at proper pressure and flow rate, a group of pressure release holes 4 are designed at the front end of the cartridge 2 and used for controlling gas flow so as to achieve the purpose of controlling the pressure of the gas cavity.
When high-pressure gas enters the driving force generating device 6 through the gas chamber 5, the cross section in the device is larger than that of the connecting part of the gas chamber, and the side surface of the device is provided with a flow guide through hole, so that the gas is accelerated to expand. One part of the air flows out forwards to act on the front baffle plate to generate acting force for the movement of the pushing device, the other part of the air changes the flow direction to enter the side hole and is discharged through the flow guide surface, and the acting force for the movement of the pushing device is also generated and combined to generate extreme impact load.
The law of extreme impact loading can be tuned by the solid propellant charge and the pressure relief orifice to form a loading force profile as shown in figure 3.
The foregoing has outlined a detailed description of an extreme impact load loading device according to the present invention, wherein specific examples are provided herein to illustrate the principles and embodiments of the present invention, the above examples being provided only to assist in understanding the method of the present invention and its core concepts; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (5)
1. An extreme impact load loading device, comprising: the gas-sealed latch body is arranged at the bottom of the gas chamber, the charging structure is arranged in the gas chamber and is adjacent to the gas-sealed latch body, the driving force generating device is used for generating extreme impact load with transient action under the action of high-pressure gas, the load loading connector is arranged in the gas chamber and is connected with the tested stress device through the load loading connector, and the extreme impact load is transmitted to the tested device according to the required load loading direction.
2. The extreme impact load loading device according to claim 1, wherein the driving force generating device adopts an impact type or reaction type muzzle brake structure, and a front end baffle plate is used for sealing a central bullet hole of the brake, and only a side hole is reserved for generating extreme impact load with transient action under the action of high-pressure gas.
3. The extreme impact load loading device of claim 1, wherein the charge structure comprises a cartridge disposed within the gas chamber adjacent the gas-tight latch, a solid propellant charge disposed within the cartridge, and a pressure relief aperture disposed at an end of the cartridge remote from the gas-tight latch.
4. The extreme impact load loading device of claim 1 wherein the desired loading force profile is created by adjusting the solid propellant charge and the pressure relief orifice.
5. The extreme impact load loading device of claim 1 wherein the specific method of creating the desired loading force profile by adjusting the solid propellant charge and the pressure relief orifice is:
Calculating the relation between the propellant charge combustion ratio and the generated pressure according to the propellant charge combustion equation
Wherein, ψ is the burnt percentage of gunpowder, χ, λ, μ is the shape characteristic quantity of the gunpowder, Z is the burnt relative thickness of the gunpowder, t is time, u 1 is the burning rate constant, p is the gas pressure, n is the burning rate index, e 1 is 1/2 of the initial thickness of the gunpowder;
Controlling the gas pressure by controlling the flow of the powder-filled powder type and the pressure release hole, wherein the gas pressure acts on the powder gas front end baffle plate of the driving force generating device and the acting surface of the brake structure to generate corresponding acting force;
If the total area of the front end baffle and the acting surface of the brake structure is equivalent to the area in the axial direction of the gas chamber as S, the generated impact load is F (t) =p a (t) S, wherein p a (t) is the time-varying value of the mouth pressure of the driving force generating device, and F (t) is the time-varying value of the impact load, namely the loading force curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091298.5A CN117989918A (en) | 2024-01-23 | 2024-01-23 | Extreme impact load loading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410091298.5A CN117989918A (en) | 2024-01-23 | 2024-01-23 | Extreme impact load loading device |
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| Publication Number | Publication Date |
|---|---|
| CN117989918A true CN117989918A (en) | 2024-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410091298.5A Pending CN117989918A (en) | 2024-01-23 | 2024-01-23 | Extreme impact load loading device |
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| Country | Link |
|---|---|
| CN (1) | CN117989918A (en) |
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- 2024-01-23 CN CN202410091298.5A patent/CN117989918A/en active Pending
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