KR102554356B1 - Specimen test system - Google Patents

Abstract

A specimen test system according to an embodiment includes a gas gun assembly that presses and fires a projectile; a specimen fixing device disposed in front of the gas gun assembly and supporting the first specimen at a position where the projectile fired by the gas gun assembly passes through the first specimen when the firing direction of the projectile is forward; a ram simulator disposed in front of the gas gun assembly when the firing direction of the projectile is forward, and transmitting an impact generated by collision of the projectile fired by the gas gun assembly to a second specimen; and a shield assembly preventing fragments of the specimen or fluid contained in the ram simulator from scattering, and the specimen fixing device or the ram simulator may be selectively disposed on a path along which the projectile travels.

Description

Specimen test system {SPECIMEN TEST SYSTEM}

The description below pertains to the specimen test system.

In general, the hydraulic ram test of an aircraft fuel tank is a projectile live-fire penetration test for an aircraft performed at an outdoor test site, and such a large-scale test is a proof test for an aircraft that has been developed, and requires a lot of cost, time, and manpower. Accordingly, it is virtually impossible to evaluate overall battle damage and structural survivability by performing various test conditions and analyzing results. Therefore, it is required to provide an environment that can effectively perform element and component level specimen tests for the evaluation of hydraulic ram damage and survivability of aircraft fuel tank structures with one test equipment.

US Patent Registration No. 4,828,206 (registered on May 9, 1989) discloses a hydraulic ram test apparatus.

The above background art is possessed or acquired by the inventor in the process of deriving the present invention, and cannot necessarily be said to be known art disclosed to the general public prior to filing the present invention.

An object of an embodiment is to provide a specimen testing system capable of performing two types of damage tests on specimens in one device.

A specimen test system according to an embodiment includes a gas gun assembly that presses and fires a projectile; a specimen fixing device disposed in front of the gas gun assembly and supporting the first specimen at a position where the projectile fired by the gas gun assembly passes through the first specimen when the firing direction of the projectile is forward; a ram simulator disposed in front of the gas gun assembly when the firing direction of the projectile is forward, and transmitting an impact generated by collision of the projectile fired by the gas gun assembly to a second specimen; and a shield assembly preventing fragments of the specimen or fluid contained in the ram simulator from scattering, and the specimen fixing device or the ram simulator may be selectively disposed on a path along which the projectile travels.

The specimen test system, (i) when the specimen fixing device is disposed on the path along which the projectile travels, performs an experiment to penetrate the first specimen, and (ii) performs an experiment on the path along which the projectile travels. When the ram simulator is disposed, an experiment may be performed to measure the effect of the impact transmitted to the second specimen.

The gas gun assembly may include: a first gas gun that fires a first projectile so that the first projectile penetrates the first specimen; a second gas gun that fires a second projectile and collides the second projectile with the ram simulator to generate an impact; a gas gun holder for mounting the first gas gun and the second gas gun; and a pressure control device for controlling internal pressures of the first gas gun and the second gas gun, respectively.

Diameters of the first gas gun and the second gas gun may be different from each other.

The first gas gun and the second gas gun may be mounted on or disengaged from the gas gun holder, respectively.

A distance between the first gas gun and the second gas gun may be adjusted.

The gas gun cradle includes a cradle body for mounting the first gas gun and the second gas gun at a launchable height; a sliding part for allowing the first gas gun and the second gas gun to be released from the gas gun holder or installed in the gas gun holder by sliding; and a recoil buffer for absorbing recoil so that the first gas gun and the second gas gun are not separated from the cradle body when the first gas gun and the second gas gun are fired.

The shield assembly may include a tunnel-shaped shield body; a fixing member fastened to the specimen fixing device or the ram simulator; a drain through which the fluid moves; and windows formed of a transparent material on both sides of the shield body.

A specimen test system according to an embodiment includes a gas gun assembly including a first gas gun and a second gas gun that can be mounted and detached and have different diameters, and pressurizes a projectile to fire it; When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly and supports the first specimen at a position where the first projectile fired by the first gas gun penetrates the first specimen. ; and a ram simulator that is disposed in front of the gas gun assembly when the firing direction of the projectile is forward, and transmits an impact generated by the collision of the second projectile fired by the second gas gun to the second specimen, , The first gas gun and the specimen fixing device may be arranged in a line, or the second gas gun and the ram simulator may be arranged in a line.

The specimen fixing device may include a first stopper through which a first projectile fired from the first gas gun passes; a specimen support placed in front of the first stopper and on which the first specimen is mounted; and a second stopper that is disposed in front of the specimen support and stops when the first projectile penetrating the specimen collides with it.

The ram simulator includes a cylinder; a plate disposed at one end of the cylinder and colliding with a second projectile fired from the second gas gun; a slip joint disposed between the plate and the cylinder and moving in an entry direction of the second projectile when the second projectile collides with the plate; an inlet through which fluid is injected into the cylinder; a valve disposed on top of the cylinder; and a specimen fixing plate disposed at the other end of the cylinder where the plate is not disposed and fixing the specimen.

A specimen test system according to an embodiment includes a gas gun assembly including two gas guns each capable of being mounted and disengaged and having different diameters, and firing a projectile by applying pressure to the projectile; When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly, supports a first specimen, and is relatively movable with respect to the gas gun assembly; When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly and transmits an impact generated by collision of the projectile fired by the gas gun assembly to the second specimen and moves relative to the gas gun assembly ram simulator available; And it may include a rail disposed on the moving path.

The rail may include a pair of first lanes for guiding the specimen fixing device and the ram simulator to move perpendicularly to a longitudinal direction of the gas gun assembly.

The specimen test system further includes a shield assembly that prevents fragments of the specimen or fluid contained in the ram simulator from scattering and is relatively movable with respect to the gas gun assembly, and the rail includes the shield assembly in the longitudinal direction of the gas gun assembly. It may further include a pair of second lanes for guiding to move in parallel to.

The specimen test system further includes an extension tank that prevents gas ejected from the gas gun assembly from diverging and is relatively movable with respect to the gas gun assembly, and the rail includes the extension tank in a longitudinal direction of the gas gun assembly. It may further include a pair of third lanes for guiding to vertically move with respect to.

The specimen testing system of an embodiment may perform two types of damage tests on specimens within one system.

The specimen test system of an embodiment can control various variables such as types of projectiles, firing speed, specimen shape and material within one system, and efficient use of space because it is not necessary to form a plurality of safety facilities for high-pressure gas. this is possible

1 is a plan view of a specimen testing system according to an embodiment.
2 is a perspective view of a gas gun assembly according to an embodiment.
3 is a perspective view of a specimen fixing device according to an embodiment.
4 is a perspective view of a RAM simulator according to an embodiment.
5 is a perspective view of a shield assembly according to an embodiment.

Hereinafter, embodiments will be described in detail through exemplary drawings. In adding reference numerals to components of each drawing, it should be noted that the same components have the same numerals as much as possible even if they are displayed on different drawings. In addition, in describing the embodiment, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiment, the detailed description will be omitted.

In addition, in describing the components of the embodiment, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term. When an element is described as being “connected,” “coupled to,” or “connected” to another element, that element may be directly connected or connected to the other element, but there may be another element between the elements. It should be understood that may be "connected", "coupled" or "connected".

Components included in one embodiment and components having common functions will be described using the same names in other embodiments. Unless stated to the contrary, descriptions described in one embodiment may be applied to other embodiments, and detailed descriptions will be omitted to the extent of overlap.

1 is a plan view of a specimen testing system according to an embodiment.

Referring to FIG. 1 , since the components of the specimen test system 1 may be moved and their relative positions may be different, experiments on specimens using two types of gas guns may be performed within one system. For example, according to the specimen test system 1, it is possible to implement and evaluate the combat damage of aircraft fuel tanks in two types. The specimen fixing device 12 or the ram simulator 13 may be selectively disposed on a path along which a projectile fired from one of two types of gas guns travels. For example, in order to conduct an experiment in which a projectile fired from one gas gun penetrates a specimen fixed to the specimen holding device 12, the gas gun and the specimen holding device 12 may be arranged in a line, In order for a projectile fired from another gas gun to collide with the ram simulator 13, the corresponding gas gun and the ram simulator 13 may be arranged in a line. That is, using the specimen test system 1, (i) when the specimen fixing device 12 is disposed on the path along which the projectile travels, an experiment is performed to penetrate the first specimen, and (ii) the projectile travels When the ram simulator 13 is placed on the path, an experiment may be performed to measure the effect of the impact transmitted to the second specimen. For example, (i) in the case of the experiment, damage caused by the hydraulic ram pressure that occurs when the projectile penetrates the specimen of the fuel tank containing the fluid, (ii) in the case of the experiment, the configuration of the fuel tank by the hydraulic ram phenomenon Damage occurring to the T-Joint specimen of the fastening part, which is an element, can be simulated. On the other hand, the relative movement of these components may be possible by sliding each of the components on the rail 16 disposed on the moving path. For example, the specimen testing system 1 may include a gas gun assembly 11, a specimen holding device 12, a ram simulator 13, a shield assembly 14, an extension tank 15 and a rail 16. can

When the extension tank 15 is used, a space in which gas is ejected may be secured while a projectile fired from the gas gun assembly 11 moves to the specimen fixing device 12 or the ram simulator 13.

The rail 16 may be disposed in the moving path of the components of the specimen testing system 1 . For example, the rail 16 may include a first lane 161 , a second lane 162 , and a third lane 163 .

The first lane 161 is formed as a pair, and may guide the specimen fixing device 12 and the ram simulator 13 to move vertically with respect to the longitudinal direction of the gas gun assembly 11 .

The second lanes 162 are formed as a pair and may guide the shield assembly 14 to move parallel to the longitudinal direction of the gas gun assembly 11 .

The third lane 163 is formed as a pair and may guide the extension tank 15 to move vertically with respect to the longitudinal direction of the gas gun assembly 11 .

2 is a perspective view of a gas gun assembly according to an embodiment.

Referring to FIG. 2 , the gas gun assembly 11 may fire a projectile by applying pressure to the projectile. For example, the gas gun assembly 11 may include a first gas gun 111 , a second gas gun 112 , a gas gun holder 113 and a pressure control device 114 .

The first gas gun 111 may fire a projectile to penetrate the first specimen. For example, the first gas gun 111 may include a first gas gun body 1111, a first gas gun loading part 1112, and a first breech 1113.

The first gas gun body 1111 may guide a direction in which a projectile is propelled.

A projectile may be loaded into the first gas gun loading unit 1112 .

The first breech 1113 may load the projectile into the first gas gun loading unit 1112 while moving forward.

The second gas gun 112 may launch a projectile and collide with the ram simulator 13 to generate an impact. For example, the diameters of the first gas gun 111 and the second gas gun 112 may be different depending on the type of projectile. The first gas gun 111 may be a 25mm gas gun, and the second gas gun may be a 120mm gas gun. For example, the second gas gun 112 may include a second gas gun body 1121 , a second gas gun loading part 1122 and a second breach 1123 . Here, the functions performed by the second gas gun body 1121, the second gas gun loading part 1122, and the second breach 1123 are the first gas gun body 1111, the first gas gun loading part 1112, and the first breach ( breech) 1113 may correspond to the function performed.

The gas gun holder 113 can mount the first gas gun 111 and the second gas gun 112 . The first gas gun 111 and the second gas gun 112 may be mounted on or disengaged from the gas gun holder 113, respectively. For example, the gas gun holder 113 may include a holder body 1131, a sliding part 1132, and a recoil buffer 1133.

The cradle body 1131 can mount the first gas gun 111 and the second gas gun 112 at a launchable height.

The sliding part 1132 can be released from the gas gun holder 113 or mounted on the gas gun holder 113 by sliding the first gas gun 111 and the second gas gun 112 . According to this configuration, the distance between the first gas gun 111 and the second gas gun 112 can be adjusted. For example, the relative distance between the first gas gun 111 and the second gas gun 112 may be adjusted by sliding either one of the first gas gun 111 and the second gas gun 112 .

The recoil buffer 1133 may buffer recoil so that the first gas gun 111 and the second gas gun 112 are not separated from the cradle body 1131 when they are fired. For example, the recoil buffer 1133 may absorb a percussion generated when the first gas gun 111 and the second gas gun 112 are engaged.

The pressure control device 114 can control the internal pressure of the first gas gun 111 and the second gas gun 112 . For example, the pressure control device 114 may be remotely controlled so that preset pressures are formed inside the first gas gun 111 and the second gas gun 112 according to experimental conditions.

Hereinafter, when the relative positions of components are defined as front and rear, the firing direction of the projectile is referred to as forward.

3 is a perspective view of a specimen fixing device according to an embodiment.

Referring to FIG. 3 , the specimen fixing device 12 is disposed in front of the gas gun assembly 11 and supports the first specimen at a position where a projectile fired by the gas gun assembly 11 penetrates the first specimen. can For example, the specimen fixing device 12 may include a first stopper 121, a specimen support 122, a second stopper 123, a table 124, and a fixing device moving means 125. .

A projectile fired from the first gas gun 111 may pass through the first stopper 121 . For example, a hole may be formed in the first stopper 121 through which a projectile or a part of the projectile may pass. For example, the first stopper 121 may be a sabot stopper.

The specimen support 122 is disposed in front of the first stopper 121, and a first specimen may be mounted thereon. For example, the specimen support 122 may conveniently mount or replace the first specimen according to the shape of the first specimen.

The second stopper 123 is disposed in front of the specimen support 122 and can stop a projectile that has passed through the first specimen by colliding with it.

A first stopper 121, a specimen support 122, and a second stopper 123 may be disposed on the table 124, and may absorb shock caused by collision of a projectile and breakage of the first specimen.

The fixture moving means 125 slides along the first lane 161 to move the specimen holder 12 so that it is disposed in front of the gas assembly 11 or not aligned with the gas assembly 11. can

4 is a perspective view of a RAM simulator according to an embodiment.

Referring to FIG. 4 , the ram simulator 13 is disposed in front of the gas gun assembly 11 and can transmit an impact generated by the collision of the projectile fired by the gas gun assembly 11 to the second specimen. For example, it is possible to analyze the size and tendency of damage caused by transferring the hydraulic ram pressure generated when a projectile fired from a 120 mm gas gun collides with the plate 131 to the second specimen, which is a T-Joint fastening part. For example, the ram simulator 13 includes a cylinder 133, a plate 131, a slip joint 132, an inlet 136, a valve 134, a specimen fixing plate 135, and a ram simulator moving means 138. can include

Fluid is accommodated in the cylinder 133, and an impact generated on one side of the cylinder 133 can be transferred to the other side through the fluid.

The plate 131 is disposed at one end of the cylinder 133 and a projectile fired from the second gas gun 112 may collide therewith.

The slip joint 132 is disposed in contact with the plate 131 and the cylinder 133 and may move in the entry direction of the projectile when the projectile collides with the plate 131 . Since the slip joint 132 serves to maximally remove or delay disturbance due to vibration due to collision and other factors, it can help to distinguish between hydraulic wrap pressure and pressure due to impact. For example, the slip joint 132 may be airtightly formed between the plate 131 and the cylinder 133 to seal the flow of fluid.

A fluid may be injected into the cylinder 133 through the inlet 136 .

A valve 134 may be disposed at the top of the cylinder 133. Fluid may be injected until it fills the inside of the cylinder 133 and flows out through the valve 134.

The specimen fixing plate 135 may be disposed at the other end of the cylinder 133 on which the plate 131 is not disposed and fix the second specimen. For example, the second specimen may be a T-Joint specimen simulating a fuel tank joint. The specimen fixing plate 135 fixes the second specimen, may have a window for discharging fluid and the damaged specimen, and may be blocked by a diaphragm. Here, the diaphragm may play a role in preventing fluid from leaking in the ram simulator 13 before the test, and may tear without transmitting the load at the moment the projectile collides.

The ram simulator moving means 138 slides along the first lane 161 so that the ram simulator 13 is disposed in front of the gas assembly 11 or not aligned with the gas assembly 11. there is.

5 is a perspective view of a shield assembly according to an embodiment.

Referring to FIG. 5 , the shield assembly 14 may prevent fragments of the specimen or fluid contained in the ram simulator 13 from scattering. For example, the shield assembly 14 may include a shield body 141, a fixing member 142, a drain 143, a window 144, an inspection window 145, and a shield assembly moving unit 146. there is.

The shield body 141 may be formed in a tunnel shape, and may block specimens or fluids scattering inside the shield body 141 .

The fixing member 142 may be fastened to the specimen fixing device 12 or the ram simulator 13 .

Fluid scattered from the ram simulator 13 may move through the drain 143 .

The windows 144 may be formed of a transparent material on both sides of the shield body 141 . Through the window 144, a test scene may be photographed through a high-speed camera installed outside the shield assembly 14 and lighting.

Through the inspection window 145, the sensor wires installed in the first specimen, the second specimen, and the RAM simulator 13 may come out and be connected to the data acquisition device.

The shield assembly moving means 146 slides along the second lane 162 so that the shield body 141 covers the specimen fixing device 12 or the ram simulator 13 disposed in front of the gas assembly 11. can be moved

As described above, although the embodiments have been described with limited drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques may be performed in an order different from the described method, and/or components of the described structure, device, etc. may be combined or combined in a different form from the described method, or other components or equivalents may be used. Appropriate results can be achieved even if substituted or substituted by

Claims (15)

A gas gun assembly that fires a projectile by applying pressure;
a specimen fixing device disposed in front of the gas gun assembly and supporting the first specimen at a position where the projectile fired by the gas gun assembly passes through the first specimen when the firing direction of the projectile is forward;
a ram simulator disposed in front of the gas gun assembly when the firing direction of the projectile is forward, and transmitting an impact generated by collision of the projectile fired by the gas gun assembly to a second specimen; and
A shield assembly preventing fragments of the specimen or the fluid contained in the ram simulator from scattering;
The specimen fixing device or the ram simulator is selectively disposed on the path of the projectile,
The gas gun assembly,
a first gas gun that fires a first projectile so that the first projectile penetrates the first specimen;
a second gas gun that fires a second projectile and collides the second projectile with the ram simulator to generate an impact;
a gas gun holder for mounting the first gas gun and the second gas gun; and
A pressure control device for controlling internal pressures of the first gas gun and the second gas gun, respectively;
The test specimen test system, characterized in that the first gas gun and the second gas gun can be attached to or detached from the gas gun cradle, respectively.
According to claim 1,
(i) when the specimen fixing device is disposed on the path along which the projectile travels, an experiment penetrating the first specimen is performed, and (ii) when the ram simulator is disposed on the path along which the projectile travels , Specimen test system, characterized in that for performing an experiment to measure the effect of the impact transmitted to the second specimen.
delete According to claim 1,
Specimen test system, characterized in that the diameters of the first gas gun and the second gas gun are different from each other.
delete According to claim 1,
Specimen test system, characterized in that the spaced distance of the first gas gun and the second gas gun can be adjusted.
According to claim 1,
The gas gun holder,
a cradle body for mounting the first gas gun and the second gas gun at a launchable height;
a sliding part for allowing the first gas gun and the second gas gun to be released from the gas gun holder or installed in the gas gun holder by sliding; and
A test specimen test system comprising a recoil buffer for absorbing recoil so that the first gas gun and the second gas gun do not escape from the cradle body when they are fired.
According to claim 1,
The shield assembly,
a tunnel-shaped shield body;
a fixing member fastened to the specimen fixing device or the ram simulator;
a drain through which the fluid moves; and
Specimen test system including windows formed of a transparent material on both sides of the shield body.
a gas gun assembly including a first gas gun and a second gas gun each capable of being mounted and disengaged and having different diameters, and firing the projectile by applying pressure to the projectile;
When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly and supports the first specimen at a position where the first projectile fired by the first gas gun penetrates the first specimen. ; and
When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly and transmits an impact generated by the collision of the second projectile fired by the second gas gun to the second specimen. And a ram simulator,
Specimen test system, characterized in that the first gas gun and the specimen fixing device are arranged in a line, or the second gas gun and the ram simulator are arranged in a line.
According to claim 9,
The specimen fixing device,
a first stopper through which a first projectile fired from the first gas gun passes;
a specimen support placed in front of the first stopper and on which the first specimen is mounted; and
A specimen test system comprising a second stopper disposed in front of the specimen support and stopped by colliding with a first projectile penetrating the first specimen.
According to claim 9,
The RAM simulator,
cylinder;
a plate disposed at one end of the cylinder and colliding with a second projectile fired from the second gas gun;
a slip joint disposed between the plate and the cylinder and moving in an entry direction of the second projectile when the second projectile collides with the plate;
an inlet through which fluid is injected into the cylinder;
a valve disposed on top of the cylinder; and
A specimen test system comprising a specimen fixing plate disposed at the other end of the cylinder where the plate is not disposed and fixing the second specimen.
A gas gun assembly including two gas guns each capable of being mounted and disengaged and having different diameters, and firing a projectile by applying pressure to the projectile;
When the firing direction of the projectile is referred to as forward, the specimen fixing device is disposed in front of the gas gun assembly, supports the first specimen, and is relatively movable with respect to the gas gun assembly;
When the firing direction of the projectile is forward, it is disposed in front of the gas gun assembly and transmits an impact generated by collision of the projectile fired by the gas gun assembly to the second specimen and moves relative to the gas gun assembly ram simulator available; and
Specimen test system with rails placed in the travel path.
According to claim 12,
the rail,
A specimen test system comprising a pair of first lanes for guiding the specimen fixing device and the ram simulator to move vertically with respect to the longitudinal direction of the gas gun assembly.
According to claim 12,
Further comprising a shield assembly that prevents fragments of the specimen or the fluid contained in the ram simulator from scattering and is relatively movable with respect to the gas gun assembly;
the rail,
The specimen test system further comprises a pair of second lanes for guiding the shield assembly to move in parallel to the longitudinal direction of the gas gun assembly.
According to claim 12,
Further comprising an extension tank that prevents the gas ejected from the gas gun assembly from diverging and is relatively movable with respect to the gas gun assembly,
the rail,
The specimen test system further comprises a pair of third lanes for guiding the extension tank to move vertically with respect to the longitudinal direction of the gas gun assembly.

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