CN102358396B - Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment - Google Patents
Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment Download PDFInfo
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- CN102358396B CN102358396B CN 201110161915 CN201110161915A CN102358396B CN 102358396 B CN102358396 B CN 102358396B CN 201110161915 CN201110161915 CN 201110161915 CN 201110161915 A CN201110161915 A CN 201110161915A CN 102358396 B CN102358396 B CN 102358396B
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- jet flow
- bubble
- turbogrid plates
- rope
- turbogrid
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Abstract
The invention provides a device for eliminating influences of a bubble jet flow in a cabin-section underwater explosion experiment. The device comprises a turbogrid plate, ropes and euphroes; the turbogrid plate is a quadrate composite plate with each side length of 2Rm, Rm is a maximal radius of each bubble, the first layer of the turbogrid plate is a rubber layer, a second layer of the turbogrid plate is a steel plate layer, the rubber layer and the steel plate layer are same in thickness, grids are uniform in size, and the area of the grids accounts for 1/2 of the total area; four corners of the turbogrid plate are respectively provided with a rope, and each rope is provided with one euphroe; and the turbogrid plate is fixed at a position D(D=0.4Rm) away from an explosion center below the explosion center by using the ropes. The device provided by the invention has the characteristics that: firstly the turbogrid plate can be used for attracting the bubbles so as to reduce the influences of the jet flow; secondly, by means of the transmission effect of the grids to a shock wave, the turbogrid plate can be used for greatly reducing the reflected shock wave so as to maximally lower the interferences of the reflected shock wave to a normal incident shock wave; and finally, the advantages of lower method cost, simplicity for workpiece processing, convenience for operation and better effect are achieved.
Description
Technical field
What the present invention relates to is a kind of underwater blast experimental installation, and specifically a kind of bubble jet flow of eliminating is on the cabin section underwater blast experimental installation of works impact.
Background technology
Carrying out mock-up cabin section when experiment, consider the restriction of cartridge bag quality and experimental site, want to reach the close effect of injuring in the real ship blast, the distance of cartridge bag and model is very little, and quick-fried distance may be less than the maximum radius of bubble.The bubble that this moment blast produces will be attracted by body structure surface consumingly in the stage of caving in, and will form one jet in bubble inside, and this strand jet generation is in the one side away from body structure surface, and pass bubble at a high speed, until it strikes the another side of walls.Thereby bubble jet flow will affect the effect of testing to the effect of structure, be unfavorable for observing separately shock wave on the impact of cabin segment model.Therefore need a kind of bubble jet flow of eliminating on the device of works impact, carry out cabin section underwater blast experiment on the basis of this device.
Summary of the invention
The object of the present invention is to provide that a kind of equipment investment is few, simple to operate, the device of bubble jet flow impact in the elimination cabin section underwater blast experiment of successful.
The object of the present invention is achieved like this:
Comprise Turbogrid plates, rope and boomer; Described Turbogrid plates are that the length of side is 2R
mSquare composite board, R wherein
mBe the maximum radius of bubble, the ground floor of Turbogrid plates is that rubber layer, the second layer are the steel plate layer, and two-layer thickness equates that grid size is even, and the area of grid accounts for 1/2 of the gross area; On four angles of Turbogrid plates a rope is installed respectively, a boomer is set on the every rope; It is the position of D that Turbogrid plates are fixed on the quick-fried heart of distance below the quick-fried heart by rope, D=0.4R
m
The present invention can also comprise:
1, there is cavity structure described rubber layer inside.
2, described cavity structure is staggered truncated cone-shaped chamber.
3, on four of Turbogrid plates angles an iron hoop is arranged respectively, there is hook at the two ends of rope.
4, described bubble maximum radius
Wherein W is that dose, H are the initial depth of the quick-fried heart.
The present invention is a kind of device that utilizes Turbogrid plates to eliminate bubble jet flow impact in the section underwater blast experiment of cabin.In the model underwater blast experiment, mainly examine the effect of shock wave, but consider cartridge bag quality and experimental site restriction, the quick-fried distance of cartridge bag may be less than the bubble maximum radius, so the existence of jet causes the result inaccurate interference experiment.The present invention is take the Bjerknes effect as the basis, employing (with the buoyancy opposite sense) below quick-fried some position arranges the method for Turbogrid plates, in the hope of reducing works to the Bjerknes power of bubble, so that change has occured in the jet direction of bubble, to eliminate bubble jet flow to the impact of experiment effect.This device has following advantage: at first Turbogrid plates can attract bubble, reduce the impact of jet; Secondly Turbogrid plates greatly reduce the shock wave of reflection by the transmission effect of grid shock wave, reduce to greatest extent the interference that return shock aligns incident blast wave; Last the method expense is low, workpiece processing is simple, easy to operate, effect is better.Solved when the investigation shock wave destroys works in the section underwater blast experiment of cabin, bubble jet flow disturbs large problem.
Description of drawings
Fig. 1 is Turbogrid plates shape scheme drawing;
Fig. 2 is the A-A section-drawing of Fig. 1, reflection be the Turbogrid plates lamination layer structures;
Fig. 3 is the B-B section-drawing of Fig. 2;
Fig. 4 is that rope, boomer and hook are connected sequential schematic;
Fig. 5 is use view of the present invention.
The specific embodiment
For example the present invention is done more detailed description below in conjunction with accompanying drawing:
In conjunction with Fig. 1-Fig. 4.The device of bubble jet flow impact mainly comprises Turbogrid plates, rope 7 and boomer 6 in the section underwater blast experiment of elimination of the present invention cabin; Described Turbogrid plates are that the length of side is 2R
mSquare composite board, R wherein
mBe the maximum radius of bubble, the ground floor of Turbogrid plates is that rubber layer 4, the second layer are steel plate layer 3, and two-layer thickness equates, is 2cm respectively, and grid size is even, and the area of grid accounts for 1/2 of the gross area; On four angles of Turbogrid plates a rope is installed respectively, a boomer is set on the every rope; In conjunction with Fig. 5, it is the position of D that Turbogrid plates are fixed on the quick-fried heart of distance below the quick-fried heart by rope, D=0.4R
mThere is cavity structure 1 rubber layer inside.Cavity structure is staggered truncated cone-shaped chamber.On four angles of Turbogrid plates an iron hoop is arranged respectively, there is hook 5 at the two ends of rope.Described bubble maximum radius
Wherein W is that dose, H are the initial depth of the quick-fried heart.
Rubber layer is composited by elastomeric material, will produce distortion and absorbed energy when internal cavities is subject to explosion wave, reduces and impacts reflection of wave.
The length of 4 nylon ropes is decided according to experiment condition, and nylon rope can cushion blast load to the impact effect of Turbogrid plates.
Determine distance B=0.4R between Turbogrid plates and the quick-fried heart by numerical modelling
mThe time, Turbogrid plates will alleviate bubble jet flow to greatest extent to the destruction of works.In test, with four angles of nylon rope connection Turbogrid plates, Turbogrid plates being lifted and are fixed on the quick-fried heart of distance below the quick-fried heart is the position of D.
Claims (6)
1. a device of eliminating bubble jet flow impact in the section underwater blast experiment of cabin is characterized in that: comprise Turbogrid plates, rope and boomer; Described Turbogrid plates are that the length of side is 2R
mSquare composite board, R wherein
mBe the maximum radius of bubble, the ground floor of Turbogrid plates is that rubber layer, the second layer are the steel plate layer, and two-layer thickness equates that grid size is even, the gross area of grid account for Turbogrid plates the gross area 1/2; On four angles of Turbogrid plates a rope is installed respectively, a boomer is set on the every rope; It is the position of D that Turbogrid plates are fixed on the quick-fried heart of distance below the quick-fried heart by rope, D=0.4R
m
2. the device that bubble jet flow affects in the elimination cabin section underwater blast experiment according to claim 1, it is characterized in that: there is cavity structure described rubber layer inside.
3. the device that bubble jet flow affects in the elimination cabin section underwater blast experiment according to claim 2, it is characterized in that: described cavity structure is staggered truncated cone-shaped chamber.
4. according to claim 1, the device of bubble jet flow impact in the 2 or 3 described elimination cabin section underwater blasts experiment, it is characterized in that: on four angles of Turbogrid plates an iron hoop is arranged respectively, there is hook at the two ends of rope.
5. according to claim 1, the device of bubble jet flow impact in the 2 or 3 described elimination cabin section underwater blasts experiment, it is characterized in that: described bubble maximum radius
Wherein W is that dose, H are the initial depth of the quick-fried heart.
6. the device of bubble jet flow impact in the elimination cabin section underwater blast experiment according to claim 4 is characterized in that: described bubble maximum radius
Wherein W is that dose, H are the initial depth of the quick-fried heart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110161915 CN102358396B (en) | 2011-06-16 | 2011-06-16 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110161915 CN102358396B (en) | 2011-06-16 | 2011-06-16 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102358396A CN102358396A (en) | 2012-02-22 |
| CN102358396B true CN102358396B (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110161915 Expired - Fee Related CN102358396B (en) | 2011-06-16 | 2011-06-16 | Device for eliminating influences of bubble jet flow in cabin-section underwater explosion experiment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106759157B (en) * | 2016-12-12 | 2018-12-14 | 武汉大学 | It is a kind of to call in person the protective device of anti-underwater contact explosion for concrete gravity dam dam |
| CN106679523B (en) * | 2016-12-29 | 2017-12-26 | 武汉大学 | A kind of air buffer device for being used to eliminate underwater close-in blasting shock wave |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5114140A (en) * | 1991-02-20 | 1992-05-19 | Universal City Studios, Inc. | Explosion simulator |
| CN1665715A (en) * | 2002-05-28 | 2005-09-07 | 荷兰应用科学研究会(Tno) | Underwater shock protection device |
| CN201429624Y (en) * | 2009-04-20 | 2010-03-24 | 昆明理工大学 | Device for testing underwater explosion velocity of explosive |
| CN102042787A (en) * | 2010-12-27 | 2011-05-04 | 浙江大学 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
-
2011
- 2011-06-16 CN CN 201110161915 patent/CN102358396B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5114140A (en) * | 1991-02-20 | 1992-05-19 | Universal City Studios, Inc. | Explosion simulator |
| CN1665715A (en) * | 2002-05-28 | 2005-09-07 | 荷兰应用科学研究会(Tno) | Underwater shock protection device |
| CN201429624Y (en) * | 2009-04-20 | 2010-03-24 | 昆明理工大学 | Device for testing underwater explosion velocity of explosive |
| CN102042787A (en) * | 2010-12-27 | 2011-05-04 | 浙江大学 | Flexible composite air-curtain shock absorption protective device for underwater explosion |
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|---|---|
| CN102358396A (en) | 2012-02-22 |
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Granted publication date: 20131030 Termination date: 20200616 |