CN105606650A - Method for testing cylindrical charging near-field energy distribution character - Google Patents
Method for testing cylindrical charging near-field energy distribution character Download PDFInfo
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- CN105606650A CN105606650A CN201610143373.3A CN201610143373A CN105606650A CN 105606650 A CN105606650 A CN 105606650A CN 201610143373 A CN201610143373 A CN 201610143373A CN 105606650 A CN105606650 A CN 105606650A
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- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
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Abstract
The invention discloses a method for testing cylindrical charging near-field energy distribution character for solving the problem that the overpressure and impulse of shock waves of the explosive near field cannot be measured easily in the prior art. The method comprises the following steps: I. arranging a testing apparatus composed of a cylindrical charge (1), aluminum blocks (2), an annular support (3) and an elastic frame (4), wherein the elastic frame (4) is arranged at the center, the cylindrical charge (1) is arranged on the elastic frame (4), the annular support (3) having a certain radius is arranged at the periphery of the cylindrical charge (1), the aluminum blocks (2) are densely distributed on the annular support, and the mass center of the aluminum block (2) and the mass center of the cylindrical charge are positioned on the same horizontal plane; II. checking whether the electrical conduction property of a detonating wire is a good condition by a universal meter and testing whether a detonator is in a good condition by a detonator meter; III. loading a primer detonator for preparation of explosion initiation; IV: initiating explosion; and V, measuring a throwing distance of the aluminum block by a tape measure and carrying out data processing to obtain the cylindrical charging near-field energy distribution law. The method is used for testing cylindrical explosive charging near-field energy distribution law.
Description
Technical field
The invention belongs to blast impulse technical field of measurement and test, relate generally to a kind of cylinder grain near-field energy output point Boot of measuringProperty method, specifically a kind of measurement makes around aluminium block after cylinder grain blast by casting distance and calculates aluminium block kinetic energy distribution and enterAnd obtain the method for cylinder grain regularity of energy distribution.
Background technology
Due to the anti-ballistic warhead of air defense be generally cylindrical, energy in all cases of the research cylinder grain output regularity of distribution,For instructing warhead design, improving explosive energy utilization rate has very large meaning. Defeated to cylindrical explosive loading near-field energy at presentThe experimental study that goes out the regularity of distribution is generally that measuring shock waves superpressure distributes and time integral is obtained to momentum distribution, but due to blastThe adverse circumstances factors such as high light heat radiation, electromagnetic pulse are also followed near field except strong shock wave, and common superpressure sensor can only be measuredThe explode superpressure data near field of middle far field superpressure and can not obtaining, can obtain superpressure data through the sensor of certain protective treatment,But superpressure is measured as kinetic measurement, within a few microsecond to tens microsecond time, superpressure rises to tens to several thousand kPas, to test systemSystem has proposed very high request, and certainly will bring larger error, utilize superpressure-time graph to carry out integration after error further expand,The momentum value accuracy calculating is difficult to ensure.
Summary of the invention
For fear of the problems of measuring shock waves overvoltage test, the present invention has designed a kind of without carrying out kinetic measurement, not being subject toThe blast near field momentum method of testing of the impact such as photo-thermal electromagnetic pulse, can be used for measuring cylindrical explosive loading near-field energy output spyThe property regularity of distribution.
Step 1 of the present invention: arrange experimental rig according to test layout, experimental rig is by cylinder grain [1], aluminium block [2], ringShape support [3], firing mount [4] composition, wherein firing mount [4] centering, it is upper that cylinder grain [1] is placed in firing mount [4], cylinder grain[1] vertically place or horizontal positioned, in the time of vertical placement, can measure the cylinder grain cross section regularity of energy distribution of (circumferentially),In the time of horizontal positioned, can measure the regularity of energy distribution of cylinder grain vertical section, the explosive kind of cylinder grain is not limit, and risesQuick-fried mode is not limit, and explosive payload scope is 1.5kg～3kg, and draw ratio is 1.5～2; Taking cylinder grain [1] center as the center of circle, around360 ° of ring supports [3] of arranging certain radius, ring support [3] radius is 0.5m/kg1/3～1.2m/kg1/3, symmetrical when measuringWhen energy field, can arrange respectively in symmetry axis both sides 180 ° of semi-circular supports of different radii; Aluminium block [2] be of a size of 5cm ×10cm × 10cm, just vertically places the quick-fried heart with the face of 5cm × 10cm, is clouded in ring support [3] upper, adjusts firing mount [4] heightDegree and ring support [3] highly make aluminium block [2] barycenter and cylinder grain [1] barycenter be positioned in same level, and this height should be greater than0.5m/kg1/3To avoid the impact of ground return.
Step 2: with universal meter inspection detonating cord electric conductivity, first connect, then disconnect, repeat two to three times, observe two kinds of shapesUnder state, universal meter shows whether resistance value changes, and detonating cord electric conductivity is good if change; Test detonator with Primer meterWhether intact, method is the same.
Step 3: pack detonating capsule into, withdraw to blindage and prepare to detonate.
Step 4: detonate.
Step 5: taking the quick-fried heart as initial point, taking cylinder grain symmetry axis as datum line, with the each aluminium block of tape measure by the distance of throwingFrom si. Aluminium block does the movement of falling object after by throwing, and the speed of aluminium block is
vi＝(si-R)/(2H/g)1/2
Wherein, R and H are respectively initial radium (being ring support radius) and the height of aluminium block barycenter; G is acceleration of gravity,g＝9.8m/s2。
The kinetic energy of aluminium block is
Ei＝mvi 2/2
Wherein, m is aluminium block quality.
Can obtain the cylinder grain near-field energy regularity of distribution by the regularity of distribution of aluminium block kinetic energy. From computational process, errorDerive from the measurement of distance, measure test compared to superpressure, this error is less.
Realization of the present invention is also: aluminium block is of a size of 5cm × 10cm × 10cm, and the aluminium block of this shape lands rear difficult turning overRoll, thereby affect the accuracy of measurement of casting distance. For measuring aluminium block casting distance, the necessary smooth softness in test site ground,When aluminium block is landed, do not overturn, affect the measurement of casting distance.
The present invention measures test than positive pressure of shock wave, has following advantage: 1. near field of light heat radiation and electromagnetism arteries and veins are not explodedThe impacts such as punching; 2. do not need to carry out kinetic measurement, only need to measure static data, error is less, and it is convenient to measure.
Brief description of the drawings:
Fig. 1 is the device schematic diagram of measuring cylinder grain vertical section regularity of energy distribution under symmetrical detonation mode, and a is top view,B is vertical section, 1-cylinder grain, 2-aluminium block, 3-ring support, 4-firing mount.
Fig. 2 is the device schematic diagram (top view) of measuring cylinder grain cross section regularity of energy distribution under eccentric detonation mode, 1-Cylinder grain, 2-aluminium block, 3-ring support, 4-firing mount.
Detailed description of the invention:
The invention will be further described by the following examples, but the present invention is not subject to the restriction of the following example.
Embodiment 1:
For measuring one end point cylinder grain vertical section regularity of energy distribution in situation that detonates, test procedure is as follows:
Step 1: carry out target range layout according to schematic diagram. As shown in Figure 1, cylindrical naked powder column is B explosive to test layout, closeDegree is 1.65g/cm3, radius is 55mm, and length is 180mm, and draw ratio is 1.64, and quality is 2.8kg. Cylinder grainBe disposed across on firing mount. Taking cylinder grain symmetry axis as line of demarcation, at two lateral extent cylinder grain center 0.8m (0.57m/kg1/3) and 1.2m (be 0.85m/kg1/3) locate to place respectively 180 ° of semi-circular supports. Aluminium block size be 5cm × 10cm ×10cm, just vertically places the quick-fried heart with the face of 5cm × 10cm, is clouded on two semi-circular supports. Utilize laser levelCalibration makes cylinder grain barycenter and aluminium block barycenter in sustained height, is highly 1.2m.
Step 2: check that with universal meter whether detonating cord electric conductivity is intact, whether intact with Primer meter test detonator.
Step 3: pack detonating capsule at cylinder grain one end face, confirm that errorless recession detonates from preparing to blindage.
Step 4: detonate.
Step 5: taking the quick-fried heart as initial point, taking cylinder grain symmetry axis as datum line, with the each aluminium block of tape measure by the distance of throwingFrom si. Calculate speed and the kinetic energy of each aluminium block according to distance, cylinder grain vertical section Energy distribution rule when obtaining one end point and detonatingRule, when known one end point detonates, front end face center energy is the highest, and center, powder charge side energy is also higher, is secondly initiation endsFace center, powder charge side and end face intersection minimum energy.
Embodiment 2:
For the measuring center point cylinder grain vertical section regularity of energy distribution in situation that detonates, test procedure is as follows:
Step 1: carry out target range layout according to schematic diagram. As shown in Figure 1, cylindrical naked powder column is TNT to test schematic layout patternExplosive, density is 1.65g/cm3, radius is 45mm, and length is 180mm, and draw ratio is 2, and quality is 1.9kg. CylindricalPowder charge is disposed across on firing mount. Taking cylinder grain symmetry axis as line of demarcation, at two lateral extent cylinder grain center 0.62m (0.5m/kg1/3) and 1.5m (be 1.2m/kg1/3) locate to place respectively 180 ° of semi-circular supports. Aluminium block size be 5cm × 10cm ×10cm, just vertically places the quick-fried heart with the face of 5cm × 10cm, is clouded on two semi-circular supports. Utilize laser levelCalibration makes cylinder grain barycenter and aluminium block barycenter in sustained height, is highly 1.5m.
Whether step 2 checks that with universal meter whether detonating cord electric conductivity is intact, intact with Primer meter test detonator.
Step 3: pack central tube and detonating capsule into, confirm that errorless recession detonates from preparing to blindage.
Step 4: detonate.
Step 5: taking the quick-fried heart as initial point, taking cylinder grain symmetry axis as datum line, with the each aluminium block of tape measure by the distance of throwingFrom si. Calculate speed and the kinetic energy of each aluminium block according to distance, cylinder grain vertical section Energy distribution rule when obtaining central point and detonatingRule, when known central point detonates, two end face center energy are the highest, center, powder charge side energy is also higher, powder charge side andEnd face intersection minimum energy.
Embodiment 3:
For measuring the bias ± 45 ° two-wire cylinder grain cross section regularity of energy distribution in situation that detonates, test procedure is as follows:
Step 1: carry out target range layout according to schematic diagram. As shown in Figure 2, cylindrical naked powder column is B explosive to test layout, closeDegree is 1.65g/cm3, radius is 46mm, and length is 138mm, and draw ratio is 1.5, and quality is 1.5kg. Cylinder grain is perpendicularBe placed on firing mount. (be 1.05m/kg apart from cylinder grain center 1.2m1/3) locate to place 360 ° of ring supports. Aluminium block sizeFor 5cm × 10cm × 10cm, just the quick-fried heart is vertically placed with the face of 5cm × 10cm, be clouded on ring support. Utilize and swashThe calibration of light level makes cylinder grain barycenter and aluminium block barycenter in sustained height, is highly 1.2m.
Whether step 2 checks that with universal meter whether detonating cord electric conductivity is intact, intact with Primer meter test detonator.
Step 3: pack initiation net and detonating capsule into, confirm that errorless recession detonates from preparing to blindage.
Step 4: detonate.
Step 5: taking the quick-fried heart as initial point, taking cylinder grain symmetry axis as datum line, with the each aluminium block of tape measure by the distance of throwingFrom si. Calculate speed and the kinetic energy of each aluminium block according to distance, cylinder grain cross section Energy distribution when obtaining eccentric two-wire and detonatingRule is circumferentially lower the closer to fire point energy along powder charge when known bias is detonated, more higher away from fire point energy.
Claims (1)
1. a cylinder grain near-field energy distribution character method of testing, is characterized in that, comprises the steps:
Step 1: arrange experimental rig according to test layout, experimental rig is by cylinder grain [1], aluminium block [2], ring support[3], firing mount [4] composition, described firing mount [4] centering, it is upper that cylinder grain [1] is placed in firing mount [4], vertically places or level is putPut, in the time of vertical placement, can measure the cylinder grain cross section regularity of energy distribution of (circumferentially), can in the time of horizontal positionedThe regularity of energy distribution of measuring cylinder grain vertical section, the explosive kind of cylinder grain is not limit, and detonation mode is not limit, powder chargeWeight range is 2kg～3kg, and draw ratio is 1.5～2; Taking cylinder grain [1] center as the center of circle, arrange certain radius around 360 °Ring support [3], ring support radius is 0.5m/kg1/3～1.2m/kg1/3(this is scaled distance, and distance is divided by charging quality1/3 power), in the time measuring symmetry energy field, can arrange respectively in symmetry axis both sides 180 ° of semi-circular supports of different radii,To measure the Energy distribution at different distance place; Aluminium block [2] is of a size of 5cm × 10cm × 10cm, just right with the face of 5cm × 10cmThe quick-fried heart is vertically placed, and is clouded in ring support [3] upper, adjust firing mount [4] height and ring support [3] highly make aluminium block [2] barycenter andCylinder grain [1] barycenter is positioned in same level, and this height should be greater than 0.5m/kg1/3To avoid the impact of ground return.
Step 2: check that with universal meter whether detonating cord electric conductivity is intact, first connect, then disconnect, repeat two to three times, seeExamine universal meter under two states and show whether resistance value changes, and detonating cord electric conductivity is good if change; Use Primer meterWhether test detonator is intact, and method is the same;
Step 3: pack detonating capsule into, personnel withdraw to blindage and prepare to detonate;
Step 4: detonate;
Step 5: with the horizontal range s at each piece aluminium block distance test (DT) device center of tape measurei, aluminium block does freedom after by throwingFalling, the speed of aluminium block is vi＝(si-R)/(2H/g)1/2, wherein R and H are respectively initial radium and the height of aluminium block barycenterDegree, g is acceleration of gravity, g=9.8m/s2, the kinetic energy of aluminium block is Ei＝mvi 2/ 2, wherein m is aluminium block quality, by aluminium block kinetic energyThe regularity of distribution can obtain the cylinder grain near-field energy regularity of distribution.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2662722C1 (en) * | 2017-10-11 | 2018-07-27 | Федеральное казенное предприятие "Научно-исследовательский институт "Геодезия" (ФКП "НИИ "Геодезия") | Device for determining explosive charge / ammunition explosion pulse in the near zone |
| CN114544706A (en) * | 2022-01-18 | 2022-05-27 | 中国矿业大学(北京) | Experimental system and method for measuring explosive product energy distribution proportion relation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2662722C1 (en) * | 2017-10-11 | 2018-07-27 | Федеральное казенное предприятие "Научно-исследовательский институт "Геодезия" (ФКП "НИИ "Геодезия") | Device for determining explosive charge / ammunition explosion pulse in the near zone |
| CN114544706A (en) * | 2022-01-18 | 2022-05-27 | 中国矿业大学(北京) | Experimental system and method for measuring explosive product energy distribution proportion relation |
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