CN109387475A - A kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect - Google Patents
A kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect Download PDFInfo
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- CN109387475A CN109387475A CN201811297597.5A CN201811297597A CN109387475A CN 109387475 A CN109387475 A CN 109387475A CN 201811297597 A CN201811297597 A CN 201811297597A CN 109387475 A CN109387475 A CN 109387475A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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Abstract
The present invention provides a kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect, step includes: that composite solidpropellant test specimen is carried out to natural environment accelerated test, storehouse storage test respectively under same climatic environment；Reaching aging alloted days and year prescribes a time limit, is respectively taking out sample segment, utilize universal testing machine test sample mechanical property；Determine the characteristic parameter of sample bin aging effect, and using gray system theory evaluation natural environment accelerated test to the bin aging performance change trend consistency of storehouse storage test；Using conversion factor method is accelerated, the accelerated ratio that natural environment accelerated test changes over time the characteristic parameter of storehouse storage test bin aging effect is calculated；Using random comparative test t method of inspection, the heat cycle effect equivalence of natural acceleration test and storehouse storage test is determined.The present invention can true, rapidly bin aging performance of equivalent assessment composite solidpropellant under the conditions of storehouse storage test.
Description
Technical field
The present invention relates to a kind of equivalent appraisal procedures of composite solidpropellant open air heat cycle effect.
Background technique
In the combustion chamber of wall-attaching type casting, (including but not limited to three constituent element complex solids promote composite solidpropellant
Agent or four constituent element composite solidpropellants) powder column is both the energy of solid propellant rocket and the knot of solid propellant rocket
Structure material will be subjected to the test of various environment in manufacture, transport, storage and use process, its structural behaviour is not allowed to send out
Raw too big variation, thus composite solidpropellant bin aging performance is proposed and is distinctly claimed, in some sense, composite solid
It is to estimate the most important foundation of Solid Rocket Motor Service Life that body propellant, which stores ageing properties,.
Since the shell of solid propellant rocket is metal material, the humid air in air can be prevented to admittedly well
Body rocket engine internal penetration, therefore influence the master of composite solidpropellant bin aging performance inside solid propellant rocket
Wanting environmental factor is storage environment temperature.At the same time, composite solidpropellant is in land storehouse and warship cabin indoor storage, with
And harsh day and night temperature can be undergone to change when war preparedness is on duty outdoors, fine day, the difference variation in the daytime at cloudy day, rainy day, and
The Seasonal Temperature Difference of spring, summer, autumn and winter changes, and so that composite solidpropellant is expanded and is shunk repeatedly, mechanical property declines rapidly.Therefore,
Composite solidpropellant is with playing in long term storage mainly based on based on the temperature difference aging recycled consecutive days.
In consideration of it, by strengthening solar radiation on daytime fuel factor, promoting examination we have proposed on the basis of recycling consecutive days
Area's environment temperature and day and night temperature are tested, to improve the natural environment accelerated test side of composite solidpropellant heat ageing rate
Method can be quickly obtained composite solidpropellant bin aging performance degradation rule, but how assess natural environment accelerated test
The equivalence between indoor heat cycle effect that the outdoor heat cycle effect and storehouse storage test method that method obtains obtain is still
The method of lacking.
Summary of the invention
The purpose of the present invention is to provide a kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect, the party
Method can true, rapidly bin aging performance of equivalent assessment composite solidpropellant under the conditions of storehouse storage test.
To achieve the goals above, the present invention adopts the following technical scheme that.
A kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect, step include:
Step 1: composite solidpropellant test specimen is carried out into natural environment accelerated test, library respectively under same climatic environment
Room storage test；Wherein, composite solidpropellant test specimen is by Type B tensile sample system in GJB 770B-2005 method 413.1
Sample is stretched at dumb-bell shape, preferably uses 120mm × 25mm × 10mm specification, each detection cycle parallel sample quantity should be no less than 5
Part keeps sample no less than 10 in advance；
Step 2: when reaching natural environment accelerated test aging alloted days and the storehouse storage test aging prescribed number of years, respectively taking
Part composite solidpropellant sample out utilizes universal testing machine test sample mechanical property；
Step 3: using performance degradation as principle, it is preferable to determine the characteristic parameter of composite solidpropellant bin aging effect, and benefit
With gray system theory evaluation natural environment accelerated test to the bin aging performance change trend consistency of storehouse storage test；
Step 4: using conversion factor method is accelerated, calculating natural environment accelerated test to storehouse storage test bin aging effect
The accelerated ratio that characteristic parameter changes over time；
Step 5: utilizing random comparative test t (time) method of inspection, determine that natural acceleration test and the heat of storehouse storage test follow
Toroidal effect equivalence.
Preferably, natural environment accelerated test aging alloted days are respectively 0 day, 19 days, 34 days, 55 in step 2
It, 76 days, 124 days, be limited to 0 year, 0.25,0.5 year, 1 year, 1.5 years, 2 years in corresponding storehouse storage test aging year.
Preferably, above-mentioned composite solidpropellant is that three constituent element composite solidpropellants or four constituent element complex solids promote
Agent.
Preferably, in the equivalent appraisal procedure step, using fracture elongation as the characteristic parameter.
The invention has the following advantages: the present invention is suitable for three constituent elements and four constituent element composite solidpropellants in nature
Bin aging effect equivalence assessment under environmental accelerated test, storehouse storage test, the storehouse with existing pertinent literature report
Storage test method is compared with the bin aging effect equivalence evaluation method of laboratory accelerated aging test method, the present invention from
The bin aging effect that two kinds of test methods obtain is evaluated in terms of simulation, acceleration, otherness three, and two kinds of test methods are equal
On the basis of the bin aging effect of consecutive days circulation, it can more realistically assess outdoor heat cycle effect and storehouse stores thermal cycle
The equivalence of effect.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, but the explanation of following embodiment is only used
The principle of the present invention and its core concept are understood in help, not limiting the scope of the present invention.It should be pointed out that for this
For the those of ordinary skill of technical field, without departing from the principle of the present invention, the improvement carried out for the present invention
It falls into the protection scope of the claims in the present invention.
Embodiment
A kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect, this method follow the steps below:
Step 1: 120mm × 25mm × 10mm dumb-bell shape is made in a certain composite solidpropellant and stretches sample, by the composite solid
Body propellant test sample carries out natural environment accelerated test, storehouse storage examination respectively under same tropical marine climate environment
It tests；
Step 2: old in natural environment accelerated test aging 0 day, 19 days, 34 days, 55 days, 76 days, 124 days and storehouse storage test
When changing 0 year, 0.25,0.5 year, 1 year, 1.5 years, 2 years, 5 composite solidpropellant samples, sharp day universal material are respectively taken out
The maximum tensile strength of testing machine test sample, maximum extension rate, breaking strength, fracture elongation；
Step 3: since fracture elongation shows as degradation trend under the conditions of two kinds of test methods, preferably fracture elongation is made
For the characteristic parameter of composite solidpropellant bin aging effect, nondimensionalization processing (i.e. extension is made to fracture elongation
Rate retention rate), wherein natural environment accelerated test, storehouse storage test fracture elongation retention rate be shown in Table 1,
The fracture elongation retention rate of table 1 composite solidpropellant, two kinds of test methods
| Ageing time (a) | Storehouse storage test (%) | Ageing time (d) | Natural environment accelerated test (%) |
| 0 | 100.00 | 0 | 100.00 |
| 0.25 | 98.65 | 19 | 99.22 |
| 0.5 | 95.38 | 34 | 95.98 |
| 1 | 96.66 | 55 | 96.59 |
| 1.5 | 92.82 | 76 | 94.75 |
| 2 | 95.51 | 124 | 95.41 |
For data in table 1, using gray system theory, (I) calculates storehouse storage test according to the following formula, natural environment accelerates examination
The difference series tested:
Δ (k)=| x0(k)-x1(k) |, k=1,2 ... n (I)
Poor series calculated result is as follows:
Δ k=(0,0.57,0.6,0.07,1.93,0.1)
Wherein, the maximum difference and lowest difference of vector are respectively 1.93,0 in difference series, according to formula (II) calculate correlation coefficient ξ:
In formula: ρ is resolution ratio, and ρ is smaller, and resolving power is bigger, generally in [0,1] section value, often takes 0.5, then
ξ (k)=(1,0.63,0.62,0.93,0.33,0.91)
(III) calculating correlation according to the following formula:
In formula: the more serial degree of association to reference series of r-；ξ (k)-more serial is k component to reference serial number
Incidence coefficient；Data group number in n-series；
Natural acceleration test is 0.74 to storehouse storage test degree of association r as a result, illustrates that natural environment accelerated test and storehouse are store
The bin aging performance change trend consistency for depositing test is preferable.
Step 4: for composite solidpropellant storehouse storage test, the reserved elongation at break data of natural acceleration test,
Data fitting is carried out using exponential model:
PStorehouse=98.668e-0.00007t
PAccelerate=98.960e-0.0004t
According to matched curve, the time for reaching identical reserved elongation at break in two kinds of test methods is calculated, is shown in Table 2,
2 composite solidpropellant of table reaches the test period of identical reserved elongation at break
Using the 2 natural acceleration test time of table as abscissa, to reach the storehouse storage test of identical elongation at break and add naturally
The ratio T/t of speed test is ordinate mapping, obtains accelerated ratio with the changing rule of natural acceleration test:
ASF=5.71-39.366/tAccelerate
It follows that accelerated ratio gradually tends to 5.71 times as the natural acceleration test time extends,
Step 5: for composite solidpropellant storehouse storage test, the reserved elongation at break data of natural acceleration test,
Using random comparative test t (time) method of inspection, (IV) determines that the complex solid that two kinds of test methods obtain promotes according to the following formula
Otherness between developing agent storage aging effect:
In formula:--- the average value of storehouse storage test, natural acceleration test；
x1i, x2i--- storehouse storage test, i-th of data of natural acceleration test；
N1, N2--- the data amount check of storehouse storage test, natural acceleration test；
Being computed t value is 0.36, is less than t0.1,10(1.81), illustrate when confidence level is 90%, storehouse storage test adds naturally
Speed test that is to say outdoor heat cycle effect and storehouse heat cycle effect to composite solidpropellant bin aging performance indifference
It is equivalent.
Claims (4)
1. a kind of equivalent appraisal procedure of composite solidpropellant open air heat cycle effect, it is characterised in that step includes:
Step 1: composite solidpropellant test specimen is carried out into natural environment accelerated test, library respectively under same climatic environment
Room storage test；
Step 2: when reaching natural environment accelerated test aging alloted days and the storehouse storage test aging prescribed number of years, respectively taking
Part composite solidpropellant sample out utilizes universal testing machine test sample mechanical property；
Step 3: using performance degradation as principle, it is preferable to determine the characteristic parameter of composite solidpropellant bin aging effect, and benefit
With gray system theory evaluation natural environment accelerated test to the bin aging performance change trend consistency of storehouse storage test；
Step 4: using conversion factor method is accelerated, calculating natural environment accelerated test to storehouse storage test bin aging effect
The accelerated ratio that characteristic parameter changes over time；
Step 5: utilizing random comparative test time check method, determine that the thermal cycle of natural acceleration test and storehouse storage test is imitated
Answer equivalence.
2. equivalent appraisal procedure according to claim 1, it is characterised in that: in step 2, natural environment accelerated test aging
Alloted days are respectively 0 day, 19 days, 34 days, 55 days, 76 days, 124 days, are limited to 0 in corresponding storehouse storage test aging year
Year, 0.5 year, 1 year, 1.5 years, 2 years in 0.25.
3. equivalent appraisal procedure according to claim 2, it is characterised in that: composite solidpropellant is three constituent element composite solids
Body propellant or four constituent element composite solidpropellants.
4. equivalent appraisal procedure according to claim 1,2 or 3, it is characterised in that: using described in fracture elongation conduct
Characteristic parameter.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082384A (en) * | 2019-05-15 | 2019-08-02 | 湖北航天化学技术研究所 | Flow Behavior of Solid High Energy Propellant column produces gas and generates hole or cracking time prediction technique |
| CN110927050A (en) * | 2019-09-25 | 2020-03-27 | 中国电器科学研究院股份有限公司 | Method for predicting service life of polystyrene material by utilizing sun tracking light condensation accelerated aging test |
| CN112504029A (en) * | 2020-11-30 | 2021-03-16 | 西安航天动力研究所 | Accelerated storage life evaluation method for solid double-base propellant small rocket |
| CN114414463A (en) * | 2021-12-28 | 2022-04-29 | 北京遥感设备研究所 | Long-term storage stability verification method for aluminum-based composite material optical system |
-
2018
- 2018-11-01 CN CN201811297597.5A patent/CN109387475A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082384A (en) * | 2019-05-15 | 2019-08-02 | 湖北航天化学技术研究所 | Flow Behavior of Solid High Energy Propellant column produces gas and generates hole or cracking time prediction technique |
| CN110082384B (en) * | 2019-05-15 | 2021-07-23 | 湖北航天化学技术研究所 | Method for predicting time for generating holes or cracks by high-energy solid propellant grains through gas generation |
| CN110927050A (en) * | 2019-09-25 | 2020-03-27 | 中国电器科学研究院股份有限公司 | Method for predicting service life of polystyrene material by utilizing sun tracking light condensation accelerated aging test |
| CN112504029A (en) * | 2020-11-30 | 2021-03-16 | 西安航天动力研究所 | Accelerated storage life evaluation method for solid double-base propellant small rocket |
| CN112504029B (en) * | 2020-11-30 | 2022-11-18 | 西安航天动力研究所 | Accelerated storage life evaluation method for solid double-base propellant small rocket |
| CN114414463A (en) * | 2021-12-28 | 2022-04-29 | 北京遥感设备研究所 | Long-term storage stability verification method for aluminum-based composite material optical system |
| CN114414463B (en) * | 2021-12-28 | 2023-11-14 | 北京遥感设备研究所 | Long-term storage stability verification method for aluminum-based composite material optical system |
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