JPH07267200A - Cosmic dust protection bumper - Google Patents

Abstract

PURPOSE:To provide a bumper to effectively protect a space structure body when low speed cosmic dust collision occurs. CONSTITUTION:A cosmic dust protection bumper 1 installed in a state to surround the outer surface of a space structure body therewith is formed in three layers consisting of a revese bumper 3 stretched on the space structure body side 05; an obverse bumper 2 stretched facing the reverse bumper with a distance between the reverse bumper and the obverse bumper; and a crush layer 8 wherein cell structure is formed in a space between the reverse bumper 3 and the obverse bumper 2 and the cell structure is filled with an LVD explosive. This constitution gasifies or crushes and dissipates cosmic dust, colliding at a low speed of approximate 2-3km/s, by means of explosion energy of an explosive, and suppresses the damage thereof to slightness.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a space dust protection bumper installed to cover the outer surface of a space structure body in outer space to reduce damage to the space structure body due to collision of flying space dust.

[0002]

2. Description of the Related Art When a space structure is launched from the ground and accomplishes a mission in outer space, the speed of the space structure reaches 8 to 10 km / s when the space structure is in the geostationary orbit of the earth. In such a situation, cosmic dust is flying at various speeds on the orbit along which the cosmic structure travels, and the cosmic dust may collide with the cosmic structure at a speed of 1 to 16 km per second.
The damage to the space structure body due to this collision is expected to be large, and in order to minimize the damage to the space structure due to space dust, conventionally, as shown in FIGS. 2 and 3,
A space dust protection bumper was installed on the outer surface of the space structure body. In these figures, 01 is a space structure, 02 is an antenna, 03 is a space dust protection bumper, 04 is a honeycomb structure, 05 is a space structure body, 06 is a solar cell, and 07 is space dust.

As shown in FIG. 3, a space dust protection bumper 03 made of an aluminum material or the like is provided on the outer surface of the space structure body 05 via a honeycomb structure 04, so that space dust 07 flying toward the space structure 01 is provided. First collides with space dust defense bumper 03. At the time of this collision, space dust 0
When the speed of 7 is sufficiently high at about 8 to 16 km / s, the cosmic dust protection bumper 03 at the time of collision and the cosmic dust 07 are in a high temperature and high pressure state and undergo a phase change from a solid state to a liquid state or a gas state. In this way, the space dust protection bumper 03 and the space dust 07 in a gas state are referred to as a debris cloud 012. The debris cloud 012 penetrates the space dust protection bumper 03, spreads in the space in the honeycomb structure 04, and collides with the space structure body 05. However, since the debris cloud 012 is in a gas state, the space structure body due to this collision. The damage of 05 is relatively small. In this way, the conventional space dust protection bumper 03 is
The damage caused by cosmic dust 07 to 5 is minimized.

FIG. 5 shows an analysis example in which the space dust model 011 collides with the space dust defense bumper model 010 and the debris cloud 12 is generated. In the figure, only the upper part of the central axis is modeled and analyzed. As shown in the figure,
The cosmic dust model 011 that has rushed into the cosmic dust protection bumper model 010 made of aluminum goes through the states of FIGS. 5 (A) and 5 (B) to generate a debris cloud 012 as shown in FIG. 5 (C). I understand.

Further, FIG. 6 shows Swift. HL, Barnfor.
d. R and Chen. R., Deiging Dual Plate Meteoroid Shi
elds. A New Analysis, JPL Pudlication 82-39, 1982,
6A, the result of the experiment shown in FIG. 6 is also applied to the space dust protection bumper model 010 of FIG.
As shown in (B), the cosmic dust model 011 collides, and FIG.
As shown in (C), the phenomenon of generating the debris cloud 012 is shown, and the phase change of the above-mentioned cosmic dust 07 to the gas state can be understood from these as well.

As described above, the conventional space dust protection bumper 03
Then, cosmic dust 07 causes space structure 01 at a speed of 8 km / s or more.
Cosmic dust 07 when it collides with Cosmic dust defense bumper 03
The collision energy evaporates together with the space dust protection bumper 03 to form the debris cloud 012, so that damage to the space structure body can be suppressed. However, if the collision speed of cosmic dust 07 is as low as 2-3 km / s,
In a collision between the cosmic dust 07 and the cosmic dust defense bumper 03, a temperature high enough to generate a debris cloud 012
Since there is no collision energy that creates a high pressure state, cosmic dust 07 is maintained in a solid state. When such solid cosmic dust 07 penetrates the cosmic dust protection bumper 03 and collides with the cosmic structure body 05, damage to the cosmic structure body 05 is caused by the cosmic dust 07 and the debris cloud 012 vaporized by the cosmic dust protection bumper 012. Is much larger than when it collides with the space structure body, and the space structure body 05 is significantly damaged.

[0007]

Therefore, the present invention reduces the damage to the space structure body even when space dust collides with the space structure at a low collision speed of about 2 to 3 km / s. The task is to provide a space dust protection bumper that can do this.

[0008]

In order to solve the above problems, the space dust protection bumper of the present invention has the following means.

A front surface bumper forming the outer surface of the space dust protection bumper and a back surface bumper fixed to the outer surface of the space structure body are arranged facing each other with a certain space, and in the space,
A partition having a cell structure was formed, and an explosive was loaded into the cell structure to provide a crush layer, thereby forming a three-layer structure.

[0010]

According to the space dust protection bumper of the present invention, when the speed of the space dust that collides with the space structure is high by the above-mentioned means, the collision energy with the space dust protection bumper causes the space dust to gas from the solid after passing through the space dust protection bumper. In addition to reducing the damage that cosmic dust gives to the body of the space structure by changing to the phase change to, the surface bumper is The explosive energy of the explosive charged in the cell structure provided between the rear surface bumper and the back bumper vaporizes or crushes / dissipates cosmic dust to reduce damage to the space structure body.

Further, since the explosive is dispersed and filled in the partition of the cell structure, the explosion stays in a small section in the vicinity where the space dust collides and propagates to a position away from the collision position,
It does not cause extra explosions and the associated damage to the space structure itself.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the space dust protection bumper of the present invention will be described below with reference to the drawings. Similarly to the conventional space dust protection bumper, the space dust protection bumper of the present embodiment also surrounds the outer surface of the space structure body 05 as shown in FIG. 1 is a partial sectional view and a perspective view of FIG. 2 showing an embodiment of the space dust protection bumper of the present invention.

As shown in the partial sectional view of FIG. 1 (A), a space dust protection bumper 1 is installed on the outer surface of the space structure body 05 via a honeycomb structure 4. The space dust protection bumper 1 includes a front surface bumper 2 forming an outer surface and a rear surface bumper 3 facing and arranged with a space between the front surface bumper 2 and the front surface bumper 2.
And a crush layer 8 between the front bumper 2 and the back bumper 3 have a three-layer structure. The front bumper 2 and the back bumper 3 are made of a low melting point metal such as an aluminum alloy and are positively vaporized when the space dust 7 collides.

The crush layer 8 is for partitioning a space sandwiched between the front bumper 2 and the front bumper 3 into a cell structure 11 of a small partition, and a partition plate 10 and a cell shown in a perspective view in FIG. 1 (B). It consists of explosive 9 which is filled in structure 11. The cell structure 11 is a partition plate 10 made of an aluminum alloy having a thickness of about 3 m / m, and is formed in a size of 50 m / m in length × 50 m / m in width × 30 m / m in height. It is designed to occur only near the collision area. Therefore, the partition plate 11 forming the cell structure 11 may be formed of a lightweight and high-strength material such as a magnesium alloy or FRP in addition to the aluminum alloy described above.

As the explosive 9, it is preferable to use an LVD (Low Velocity Detonation) explosive having a slow explosion speed and a slow reaction.

Since the space dust protection bumper 1 of the present embodiment is constructed as described above, when the flying space dust 7 collides with the space structure 1, even if the collision speed is as high as 8 to 16 km / s, 2 Even when it is as small as ˜3 km / s, the cosmic dust 7 that has penetrated the cosmic dust defense bumper 1 is vaporized by the collision energy and the explosive energy of the explosive 9 and becomes a debris cloud or is crushed and disappears. This makes it possible to reduce damage caused by the collision of the space structure body 05 with the space dust 7. Moreover, the explosion of the explosive 9 caused by the collision of the cosmic dust 7 is also caused by the cell structure 1 near the collision of the cosmic dust 7.
Since it is limited to the blast within 1 and does not spread to other positions, damage due to this can also be prevented.

The present invention is not limited to the above-described embodiment. For example, the partition plate 11 provided on the crush layer 8 is a honeycomb provided on the outer surface of the space structure body 05 for installing the space dust protection bumper 1. It is possible to extend the structure 4 outward and replace it.

Further, the application destination is not limited to the space dust protection, and the effect can be obtained by applying it to the armor plate structure of an armored vehicle.

[0019]

As described above, according to the space dust protection bumper of the present invention, the space dust protection bumper 2
Even when cosmic dust collides with a space structure at a low velocity of about 3 km / s, the cosmic dust is forcibly vaporized or crushed / dissipated by the explosive energy of explosives interposed between the front and rear bumpers. Therefore, the damage of the space structure body due to the collision of space dust can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of a space dust protection bumper of the present invention, FIG. 1 (A) is a cross-sectional view, and FIG. 1 (B) is a perspective view of a cell structure forming the crushing layer of FIG.

FIG. 2 is a perspective view showing a part of the space structure as a whole with a partially broken surface.

FIG. 3 is a cross-sectional view showing an example of a conventional space dust protection bumper.

FIG. 4 is a cross-sectional view showing a debris cloud behavior in a conventional space dust protection bumper.

FIG. 5 is an example of analysis when the cosmic dust model collides with the cosmic dust defense bumper model.

FIG. 6 shows an example of an experiment when the cosmic dust model collides with a cosmic dust defense bumper model.

[Explanation of symbols]

 1 Space Dust Protection Bumper 2 Front Bumper 3 Back Bumper 4 Honeycomb Structure 15 Space Structure Main Body 7 Space Dust 8 Crush Layer 9 Explosive 10 Partition Plate 11 Cell Structure

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Claims (1)

[Claims] 1. In a space dust protection bumper surrounding a space structure body to reduce damage to the space structure body due to collision of flying space dust, a back surface fixed to an outer surface of the space structure body. A bumper, a front bumper spaced apart from the back bumper and opposed to each other, and a crush layer filled with explosives to form a cell structure between the back bumper and the front bumper. A space dust defense bumper.