CN105486523B - A kind of mild detonating fuze separator allowance test wire examination method - Google Patents
A kind of mild detonating fuze separator allowance test wire examination method Download PDFInfo
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- CN105486523B CN105486523B CN201410539154.8A CN201410539154A CN105486523B CN 105486523 B CN105486523 B CN 105486523B CN 201410539154 A CN201410539154 A CN 201410539154A CN 105486523 B CN105486523 B CN 105486523B
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Abstract
The invention belongs to spacecraft structure technical field, is related to a kind of allowance test wire examination method for being adapted to primacord separator, and in particular to the test method of mild detonating fuze separator comprehensive assessment separating property nargin and structure fatigue resistance nargin.Structure fatigue resistance allowance test is carried out using the mild detonating fuze containing 120% design dose, the explosion-proof impact property of the remaining structure of protective cover and separation ring under big dose is examined, ensures structural intergrity；Using the testpieces that centering sexual deviation is larger, separating property allowance test is carried out with the mild detonating fuze of 67% design dose, the small pit goaf separation reliability examined under centering sexual deviation.The present invention can fully verify the separating property nargin and structure fatigue resistance nargin of mild detonating fuze separator.
Description
Technical field
The invention belongs to spacecraft structure technical field, is related to a kind of allowance test for being adapted to primacord separator and examines
Kernel method, and in particular to the experiment side of mild detonating fuze separator comprehensive assessment separating property nargin and structure fatigue resistance nargin
Method.
Background technology
Mild detonating fuze separator is with mild detonating fuze (MDF：Mild Detonation Fuse) as separation energy
Source, acted on by detonation wave and high-temperature high-pressure fuel gas, cut off spacecraft structure covering, typical structure is as shown in figure 1, main bag
Include：Separate housing 1 (radius R), mild detonating fuze 2, protective cover 3 and fastener 4, wherein separation thickness are d.Weaken groove 5 one
As be the most weak place of structural bearing intensity, when mild detonating fuze 2 act on weaken groove 5 when, housing along weaken groove 5 at breaks
Split, so as to realize the separation process of structure.
The reliability of mild detonating fuze separator must be based on the determination of Functional Margin.The determination of conventional Functional Margin is
Based on Go/no-Go test, the unique data being collected into be effect or do not act on, but the result is that Functional Margin may it is excessive or
It is too small, and number of trials is larger, and cost is too high.L.J.Bement points out that the Functional Margin of mild detonating fuze can pass through clapboard
Method is examined, and the clapboard made with cut material is placed on mild detonating fuze, then puts pressing plate again, can obtain each hair
The maximum depth of cut of clapboard after fire[1], its Functional Margin can be determined by changing medicine core explosive payload, that is, design explosive payload
With the ratio between minimum explosive payload or the ratio between minimum separation thickness and separate housing design thickness.
According to the classical theory of detonation physics amount, when the axis 7 of Fig. 1 mild detonating fuzes overlaps with weakening the axis 6 of groove
When, detonation wave utilization rate highest, separation reliability improves therewith.By between the axis 6 of the axis 7 of mild detonating fuze and weakening groove
Distance definition is centering sexual deviation x, due in actual production, assembling and operating process, it is difficult to which mild detonating fuze is completely eliminated
Centering sexual deviation, then, the alignment degree x that separator is allowed is bigger, and its Functional Margin is also bigger, it is seen that alignment degree with point
It is closely related from performance margin, however, it is not included in the category of nargin examination by current research scholar.
At present, national military standard (GJB1307A-2004[2]), American army mark (MIL-HDBK-83578[3]、AIAA S-113-2005[4]) etc. standard require that the performance margins of the products such as priming device, explosion propagation device, cumulative blasting device and firer's acting device,
And lack the specification guidance to the nargin wire examination method of mild detonating fuze separator.By taking cumulative blasting device as an example,
GJB1307A-2004 require that the performance of 67% small pit goaf cutting maximum gauge or design dose 1.5 times of maximum gauges of cutting is abundant
Degree, but the examination to structure fatigue resistance nargin under big dose is not carried out clearly, because separator completes separation function
Meanwhile the integrality of structure is also should ensure that, prevent detonation product or separation fragment from entering enclosure interior and destroying interior instrument cable.
Also, for the weakening groove design for mild detonating fuze separator, it will change while changing 1.5 times of maximum gauges multiple
Whether the thickness of separation parameter, such as crack arrest slot thickness, protective cover, a series of this change can be finally reflected real 1.5 times most
Big thickness nargin is difficult of proof, therefore mild detonating fuze separator is not suitable for designing dose 1.5 times of maximum gauges of cutting, and
Need a kind of more reasonably structure fatigue resistance nargin wire examination method of design.
In the life cycle management of product, various mechanics, nature and thermal environment condition will be actually undergone.Conventional nargin is examined
Nuclear test is only conceived to the determination of effect propety nargin, does not consider the combined influence by environmental condition, and various undergoing
Nargin examination after mechanics, nature and thermal environmental test, it will can more reflect that the actual nargin of product is horizontal.
Bibliography
1、Laurence J.Bement.Determination of Pyrotechnic Functional Margin
[R],N93-20134.
2nd, Space Pyrotechnics Devices general specification [S] .GJB 1307A-2004.
3、Criteria for Explosive Systems and Devices Used on Space Vehicles
[S].MIL-HDBK-83578(1999).
4、Criteria for Explosive Systems and Devices on Space and Launch
Vehicles[S].AIAA S-113-2005.
The content of the invention
The present invention lacks grinding for centering sexual deviation, structure fatigue resistance and environmental condition examination for current allowance test method
Study carefully present situation, propose a kind of allowance test method for being adapted to mild detonating fuze separator, it is therefore an objective to which fully checking flexibility is led quick-fried
The separating property nargin and structure fatigue resistance nargin of rope separator.
The technical solution used in the present invention is：
A kind of mild detonating fuze separator allowance test wire examination method, this method are as follows：
Mild detonating fuze separator is using local 1:1 separation ring carries out allowance test, and is entered using upper and lower side mount structure
Row bound designs, and allowance test part structure includes separation ring, mild detonating fuze, protective cover, fastener, upper end frame and lower end frame；
Mild detonating fuze is arranged in protective cover, is connected by fastener with separating ring；The upper end of separation ring passes through fastener and upper end
Frame connects；The lower end of separation ring is connected by fastener with lower end frame；Centering sexual deviation is surveyed, chooses the smaller of centering sexual deviation
It is worth and is examined for structure fatigue resistance nargin, the higher value of centering sexual deviation is examined for separating property nargin；
Structure fatigue resistance allowance test is carried out using the mild detonating fuze containing 120% design dose, examined under big dose
The explosion-proof impact property of the remaining structure of protective cover and separation ring, ensures structural intergrity；
Using the testpieces that centering sexual deviation is larger, separating property nargin is carried out with the mild detonating fuze of 67% design dose
Experiment, the small pit goaf separation reliability examined under centering sexual deviation.
The acceptable criterion of this test method is：
(1) when taking 120% or higher situation of design dose to be examined, mild detonating fuze separator should be reliable
Separation function is completed, in addition to separate housing weakens groove location fracture, protective cover and the equal structural integrity of fastener, no fifth wheel fly
Go out；
(2) when taking 67% or lower situation of design dose to be examined, mild detonating fuze separator should be reliable
Complete separation function；
(3) above-mentioned (1) and (2) allowance test after various environmental conditions are undergone, mild detonating fuze separator are equal
Separation function should be reliably completed, structural integrity is answered in the case of the 120% or higher of dose is designed.
After all kinds of natural environments and dynamic environmental test are completed in the allowance test part series connection, carry out high and low, normal temperature and be under fire
Experiment；During combining environmental experiment examination, selection is using the separator of the mild detonating fuze containing 120% design dose in high temperature
Firing test is carried out after insulation 1h；The separator of the mild detonating fuze of the design dose of selection 67% is carried out after low-temperature insulation 1h
Firing test.
The natural environment includes temperature cycles；The dynamic environmental test includes sine sweep, random vibration.
In dynamic environmental test, allowance test part is directly anchored on testing stand, sine sweep and random vibration test
It is controlled using three control sensors, using triadic mean control method：Control point is arranged on the lower end of allowance test part
On frame, while for the acceleration magnitude at the frame of monitoring test part upper end, it is provided with monitoring sensor.
The allowance test part installation method is：According to the circumferential cloth hole of mild detonating fuze separator upper end frame to folder
Tool with beating, be then connected using M10 bolts with fixture；By the butt hole connecting hoisting device of lower end frame, test specimen is risen
Hang on shake table, separator is fixed on shaking platform；Boom hoisting utilizes mild detonating fuze separator upper end frame
Butt hole, mild detonating fuze separator is hung up, from placing 100~200mm with a distance from protector on the ground；Detonation
Point is connected by cable with electric initiating instrument；When electric initiating instrument is to fire point input current 3A, the flexibility in the separator that detonates
After fuse arming test experiment initiation, cutting separation is completed in lateral detonation wave caused by the work of explosive core and combustion gas to shell structure.
Calculate Functional Margin method be：
Having the beneficial effect that acquired by the present invention：
(1) testing program being combined using 67% small pit goaf and centering sexual deviation, mild detonating fuze separator is examined
Separating property nargin；
(2) using 120% design dose testing program, the structure fatigue resistance nargin of examination mild detonating fuze separator.
(2) the sequential examination of environmental test, the separating property nargin and knot of comprehensive assessment mild detonating fuze separator are passed through
Structure fatigue resistance nargin.
Brief description of the drawings
Fig. 1 is mild detonating fuze separator typical structure schematic diagram；
Fig. 2 is allowance test part structural representation；
Fig. 3 is the sequential flow chart of typical environment；
In figure：1st, separate housing；2nd, mild detonating fuze；3rd, protective cover；4th, fastener；5th, groove is weakened；6th, the axle of groove is weakened
Line；7th, the axis of mild detonating fuze；8th, ring is separated；9th, upper end frame；10th, lower end frame；11st, centering sexual deviation；12nd, control point；13、
Monitor sensor.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples.
Mild detonating fuze separator allowance test wire examination method of the present invention is as follows：
For simulation actual products as far as possible, mild detonating fuze separator is using local 1:1 separation ring carries out allowance test, and
Using upper and lower side mount structure carry out boundary design, allowance test part structure as shown in Fig. 2 including：Separate ring 8, mild detonating fuze
2nd, protective cover 3, fastener 4, upper end frame 9 and lower end frame 10；Mild detonating fuze 2 is arranged in protective cover 3, by fastener 4 with
Separation ring 8 connects；The upper end of separation ring 8 is connected by fastener 4 with upper end frame 9；Separate ring 8 lower end by fastener 4 with
Lower end frame 10 connects；
Centering sexual deviation 11 (absolute value) is surveyed by non-destructive detecting device, the smaller value for choosing centering sexual deviation 11 is used for
Structure fatigue resistance nargin is examined, and the higher value of centering sexual deviation 11 is examined for separating property nargin.
(1) priming system assembles
Structure fatigue resistance allowance test is carried out using the mild detonating fuze 2 containing 120% design dose, examined under big dose
The explosion-proof impact property of the remaining structure of protective cover 3 and separation ring 8, ensures structural intergrity.
Using the testpieces that centering sexual deviation 11 is larger, separating property is carried out with the mild detonating fuze 2 of 67% design dose
Allowance test, the small pit goaf separation reliability examined under centering sexual deviation.
(2) experiment process
After all kinds of natural environments and dynamic environmental test are completed in the series connection of allowance test part, high and low, normal temperature ignition examination is carried out
Test.
During combining environmental experiment examination, because the output power of mild detonating fuze 2 under the high temperature conditions typically can be slightly higher, because
, to add tight checking construction fatigue resistance nargin, selection is existed using the separator of the mild detonating fuze 2 containing 120% design dose for this
Firing test is carried out after soak 1h；Because the output power of mild detonating fuze 2 under cryogenic typically can be slightly lower, to add
Tight examination separating property nargin, the separator of the mild detonating fuze 2 of 67% design dose is selected to be carried out after low-temperature insulation 1h
Firing test.
(3) measuring point is arranged
In dynamic environmental test, allowance test part is directly anchored on testing stand, and inner circumferential uniformly installs 3 sensings
Device is controlled as experiment input control point using triadic mean.
(4) acceptable criterion
The acceptable criterion of this test method is：
(1) when taking 120% or higher situation of design dose to be examined, mild detonating fuze separator should be reliable
Separation function is completed, in addition to separate housing 1 weakens the fracture of the position of groove 5,4 equal structural integrity of protective cover 3 and fastener, without unnecessary
Thing flies out；
(2) when taking 67% or lower situation of design dose to be examined, mild detonating fuze separator should be reliable
Complete separation function；
(3) above-mentioned (1) and (2) allowance test after various environmental conditions are undergone, mild detonating fuze separator are equal
Separation function should be reliably completed, structural integrity is answered in the case of the 120% or higher of dose is designed.
Allowance test example：
The first step is allowance test part and border structure design.
Allowance test part structure described in the present embodiment is as shown in Fig. 2 the maximum of centering sexual deviation 11 is 2mm, minimum value
For 0.2mm；Mild detonating fuze design dose is 2.2g/m.
Support is hung up by cable wire by ring 8 is separated, and reduces influence of the boundary effect to separating property.
Second step is priming system assembling.Because 120% design dose is 2.6g/m, 67% design dose is 1.4g/m, because
The testpieces that this centering sexual deviation 11 is 2mm assembles 1.4g/m mild detonating fuzes 2.
3rd step is to determine experiment process.The sequential flow of typical environment described in the present embodiment as shown in Figure 3, complete by series connection
Temperature cycles, sine sweep, random vibration, finally carry out high and low, normal temperature insulation after-fire experiment.
4th step is arrangement measuring point.Sine sweep and random vibration test are controlled using three control sensors, are adopted
With triadic mean control method.Fig. 2 is shown in sensor installation signal described in the present embodiment, and control point 12 is arranged under testpieces
Hold on frame 10, while for the acceleration magnitude at monitoring test part upper end frame 9, be provided with monitoring sensor 13.
5th step is testpieces installation.
Fixture is carried out with beating, then using M10 spiral shells according to the circumferential cloth hole of mild detonating fuze separator upper end frame 9
Bolt is connected with fixture；By the butt hole connecting hoisting device of lower end frame 10, test specimen is lifted on shake table, by separator
It is fixed on shaking platform.
Boom hoisting utilizes the butt hole of mild detonating fuze separator upper end frame 9, and mild detonating fuze separator is hanged
Hang up, from placing (100~200) mm with a distance from protector on the ground.Fire point is connected by cable with electric initiating instrument.When
When electric initiating instrument is to fire point input current 3A, after the mild detonating fuze 2 in the separator that detonates detonates, explosive core, which is propagated, to be produced
Lateral detonation wave and combustion gas to shell structure be done directly cutting separation.
6th step is to calculate Functional Margin.
I.e. the small pit goaf nargin of the mild detonating fuze separator is 1.57, and centering sexual deviation nargin is 10, and structure is dynamic strong
It is 1.2 to spend nargin.
Claims (7)
- A kind of 1. mild detonating fuze separator allowance test wire examination method, it is characterised in that：This method is as follows：Mild detonating fuze separator is using local 1:1 separation ring carries out allowance test, and carries out side using upper and lower side mount structure Boundary designs, and allowance test part structure includes separation ring (8), mild detonating fuze (2), protective cover (3), fastener (4), upper end frame And lower end frame (10) (9)；Mild detonating fuze (2) is arranged in protective cover (3), is connected by fastener (4) with separating ring (8)； The upper end of separation ring (8) is connected by fastener (4) with upper end frame (9)；The lower end of separation ring (8) is by fastener (4) with Hold frame (10) connection；It is centering sexual deviation by distance definition between the axis of the axis of mild detonating fuze and weakening groove, actual measurement pair Neutral bias (11), the smaller value for choosing centering sexual deviation (11) is examined for structure fatigue resistance nargin, by centering sexual deviation (11) higher value is examined for separating property nargin；Structure fatigue resistance allowance test is carried out using the mild detonating fuze (2) containing 120% design dose, examines under big dose and protects The explosion-proof impact property of the remaining structure of shield (3) and separation ring (8), ensures structural intergrity；Using the testpieces that centering sexual deviation (11) is larger, separating property is carried out with the mild detonating fuze (2) of 67% design dose Allowance test, the small pit goaf separation reliability examined under centering sexual deviation.
- 2. mild detonating fuze separator allowance test wire examination method according to claim 1, it is characterised in that：This experiment The acceptable criterion of method is：(1) when taking 120% or higher situation of design dose to be examined, mild detonating fuze separator should be reliably completed Separation function, in addition to separation ring weakens groove location fracture, protective cover (3) and fastener (4) equal structural integrity, no fifth wheel fly Go out；(2) when taking 67% or lower situation of design dose to be examined, mild detonating fuze separator should be reliably completed Separation function；(3) above-mentioned (1) and (2) allowance test after various environmental conditions are undergone, mild detonating fuze separator all should can By completing separation function, structural integrity is answered in the case of the 120% or higher of dose is designed.
- 3. mild detonating fuze separator allowance test wire examination method according to claim 1, it is characterised in that：It is described abundant After spending all kinds of natural environments of testpieces series connection completion and dynamic environmental test, high and low, normal temperature Firing test is carried out；Combining environmental During experiment examination, selection is laggard in soak 1h using the separator of the mild detonating fuze (2) containing 120% design dose Row Firing test；The separator of the mild detonating fuze (2) of the design dose of selection 67% carries out ignition examination after low-temperature insulation 1h Test.
- 4. mild detonating fuze separator allowance test wire examination method according to claim 3, it is characterised in that：It is described from Right environment includes temperature cycles；The dynamic environmental test includes sine sweep, random vibration.
- 5. mild detonating fuze separator allowance test wire examination method according to claim 4, it is characterised in that：In mechanics In environmental test, allowance test part is directly anchored on testing stand, and sine sweep and random vibration test are passed using three controls Sensor is controlled, using triadic mean control method：Control point (12) is arranged on the lower end frame (10) of allowance test part, together When for the acceleration magnitude at monitoring test part upper end frame (9) place, be provided with monitoring sensor (13).
- 6. mild detonating fuze separator allowance test wire examination method according to claim 1, it is characterised in that：It is described abundant Spending testpieces installation method is：Circumferential cloth hole according to mild detonating fuze separator upper end frame (9), which to fixture match somebody with somebody, beats, Then it is connected using M10 bolts with fixture；By the butt hole connecting hoisting device of lower end frame (10), test specimen is lifted to vibration On platform, separator is fixed on shaking platform；Boom hoisting utilizes the docking of mild detonating fuze separator upper end frame (9) Hole, mild detonating fuze separator is hung up, from placing 100~200mm with a distance from protector on the ground；Fire point leads to Cable is crossed to be connected with electric initiating instrument；When electric initiating instrument is to fire point input current 3A, the flexibility in the separator that detonates is led quick-fried After rope (2) detonation, cutting separation is completed in lateral detonation wave caused by the work of explosive core and combustion gas to shell structure.
- 7. mild detonating fuze separator allowance test wire examination method according to claim 1, it is characterised in that：Calculate and make It is with the method for nargin：
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| CN112325712B (en) * | 2020-10-12 | 2022-08-09 | 中国运载火箭技术研究院 | Testing device for flexible detonating cord |
| CN112455728A (en) * | 2020-10-30 | 2021-03-09 | 中国运载火箭技术研究院 | Separation device for an aerospace vehicle |
| CN112298621A (en) * | 2020-10-30 | 2021-02-02 | 中国运载火箭技术研究院 | Separation shell of spacecraft separation device |
| CN115655770B (en) * | 2022-12-12 | 2023-03-14 | 四川航天川南火工技术有限公司 | Quantifiable energy-gathering cutting cable separation performance acceptance device and method |
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